Pub Date : 2025-12-05DOI: 10.1016/j.colsurfa.2025.139170
Xiaohui Li , Zhengwei Peng , Tao Xu , Zixuan Wang , Yaxin Dong , Fan Liu , Jiejun Ren , Liangjun Chen
Stretchable conductors are essential components of wearable electronics and soft robotics. However, their performance is often limited by conductivity degradation and structural failure under cyclic deformation, primarily arising from interfacial mismatch and the poor mechanical integrity of dispersed conductive nanomaterials. A continuous conductive film was formed on a pre-stretched latex balloon by spraying silver nanowire (AgNWs) ink, with hydroxypropyl methylcellulose (HPMC) acting as a film-forming agent and adhesive. Controlled shrinkage then produced flexible electrodes with hierarchically oriented ridge structures. Benefiting from the integrated film and layered ridge architecture, the resulting electrodes exhibit remarkable resistance stability, maintaining an ultralow gauge factor (GF) of 2.786 × 10−2 over a strain range of 0–150 %. Through cyclic tensile testing, filtering algorithms, microscopic morphology analysis, and Finite element analysis (FEA), we elucidated how the layered microstructures regulate stress distribution, enhance interfacial stability, and maintain conductive pathways under cyclic strain, thereby significantly reducing baseline drift (after 550 cycles at 100 % strain and 0.38 Hz, the baseline drifts remain only 7.63 %). When applied as heaters, the electrodes demonstrate excellent electrothermal stability and uniform temperature distribution under strain, underscoring their potential for next-generation flexible devices.
{"title":"Silver nanowire-based oriented multi-generation ridges for ultrastable stretchable flexible electrodes","authors":"Xiaohui Li , Zhengwei Peng , Tao Xu , Zixuan Wang , Yaxin Dong , Fan Liu , Jiejun Ren , Liangjun Chen","doi":"10.1016/j.colsurfa.2025.139170","DOIUrl":"10.1016/j.colsurfa.2025.139170","url":null,"abstract":"<div><div>Stretchable conductors are essential components of wearable electronics and soft robotics. However, their performance is often limited by conductivity degradation and structural failure under cyclic deformation, primarily arising from interfacial mismatch and the poor mechanical integrity of dispersed conductive nanomaterials. A continuous conductive film was formed on a pre-stretched latex balloon by spraying silver nanowire (AgNWs) ink, with hydroxypropyl methylcellulose (HPMC) acting as a film-forming agent and adhesive. Controlled shrinkage then produced flexible electrodes with hierarchically oriented ridge structures. Benefiting from the integrated film and layered ridge architecture, the resulting electrodes exhibit remarkable resistance stability, maintaining an ultralow gauge factor (GF) of 2.786 × 10<sup>−2</sup> over a strain range of 0–150 %. Through cyclic tensile testing, filtering algorithms, microscopic morphology analysis, and Finite element analysis (FEA), we elucidated how the layered microstructures regulate stress distribution, enhance interfacial stability, and maintain conductive pathways under cyclic strain, thereby significantly reducing baseline drift (after 550 cycles at 100 % strain and 0.38 Hz, the baseline drifts remain only 7.63 %). When applied as heaters, the electrodes demonstrate excellent electrothermal stability and uniform temperature distribution under strain, underscoring their potential for next-generation flexible devices.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139170"},"PeriodicalIF":5.4,"publicationDate":"2025-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-05DOI: 10.1016/j.colsurfa.2025.139150
Tomislav Vukovic , Jostein Røstad , Thomas Luxbacher , Jan Vinogradov , Umer Farooq , Ole Torsæter , Antje van der Net
Most zeta potential data for consolidated porous samples are obtained using an in-house-built apparatus for streaming potential measurements, without an established benchmarking procedure. It is demonstrated that a commonly used method of result comparison with available literature is unreliable. Therefore, zeta potential measurements were conducted on porous soda lime glass bead packs using two experimental setups: an in-house system and a commercial electrokinetic analyzer. The experiments evaluated the influence of measurement configuration and bead size on electrokinetic responses in sodium chloride solutions. Results show that nominally identical solid–liquid systems can yield distinct zeta potential values depending on the experimental setup, highlighting the importance of measurement configuration and system size in comparative studies. Benchmarking across bead sizes revealed an increase in zeta potential magnitude with decreasing bead radius, contradicting predictions from the modified Helmholtz–Smoluchowski equation for porous media. Additional comparisons with glass plates of similar composition indicate that smaller beads exhibit apparent zeta potential overestimation due to surface reactivity and pH variation. The findings emphasize the coupled effects of surface reactivity and system configuration, supported by a simplified capillary bundle model that, for the first time, captures the experimentally observed trends.
{"title":"Zeta potential of glass bead packs — Streaming potential apparatus bench-marking and search for a reference value","authors":"Tomislav Vukovic , Jostein Røstad , Thomas Luxbacher , Jan Vinogradov , Umer Farooq , Ole Torsæter , Antje van der Net","doi":"10.1016/j.colsurfa.2025.139150","DOIUrl":"10.1016/j.colsurfa.2025.139150","url":null,"abstract":"<div><div>Most zeta potential data for consolidated porous samples are obtained using an in-house-built apparatus for streaming potential measurements, without an established benchmarking procedure. It is demonstrated that a commonly used method of result comparison with available literature is unreliable. Therefore, zeta potential measurements were conducted on porous soda lime glass bead packs using two experimental setups: an in-house system and a commercial electrokinetic analyzer. The experiments evaluated the influence of measurement configuration and bead size on electrokinetic responses in sodium chloride solutions. Results show that nominally identical solid–liquid systems can yield distinct zeta potential values depending on the experimental setup, highlighting the importance of measurement configuration and system size in comparative studies. Benchmarking across bead sizes revealed an increase in zeta potential magnitude with decreasing bead radius, contradicting predictions from the modified Helmholtz–Smoluchowski equation for porous media. Additional comparisons with glass plates of similar composition indicate that smaller beads exhibit apparent zeta potential overestimation due to surface reactivity and pH variation. The findings emphasize the coupled effects of surface reactivity and system configuration, supported by a simplified capillary bundle model that, for the first time, captures the experimentally observed trends.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139150"},"PeriodicalIF":5.4,"publicationDate":"2025-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-04DOI: 10.1016/j.colsurfa.2025.139173
Qiongyi Huang , Wenjing Xie , Peiyao Liu , Qingwei Yu , Jingying Li , Xinyu Wei , Chunying Jiang , Peixuan Tan , Ding Cao , Ying Tang
Green synthetized Ag nanoparticles are increasingly used as antimicrobial agents topically applied to human skin for sanitization and medical purposes. Despite the widespread use, little was known on their antibiofilm efficacy and dermocompatibility. This study reports a systematic investigation into the impacts of green synthetized 0–3D Ag nanostructures, including 0D nanospheres, 1D nanowires, 2D nanoprisms and 3D nanoflowers as well as Ag nanospheres modified by different phytochemicals, on anti-biofilm efficacy and biocompatibility at the nano-skin interface. It was revealed that varying the Ag morphology induces distinct effects on two established polyspecies models consisting of skin-borne microbes (S. aureus-S. epidermidis and S. aureus-C. albicans). Ag nanospheres and nanowires are advantageous in inhibiting the formation of early biofilms (47–61 %) while Ag nanoprisms and nanoflowers are more effective in destroying mature biofilms (68–70 %). ROS-mediated oxidative stress, physical damage to cell membrane integrity, “contact killing” of microbial cells and suppression of adhesion-related gene expression are mechanisms involved in the anti-biofilm actions of these green synthetized Ag nanostructures. Furthermore, the dermocompatibility assessments were performed in reconstructed human epidermis. Although all exposed epidermis models remained > 50 % tissue viability, more Ag nanospheres were transdermally adsorbed than other morphologies while Ag nanoprisms were shown to be more cytotoxic. These findings provide insights into the impacts of 0–3D green synthetized Ag nanostructures on skin-borne polyspecies biofilms and dermocompatibility at the nano-skin interface, highlighting the importance of taking morphology and phytochemical modification into consideration for the rational design of sustainable Ag-based antimicrobials tailored for topical applications.
{"title":"The impacts of green synthetized 0-to 3-dimentional Ag nanostructures on polyspecies microbial biofilms and dermocompatibility","authors":"Qiongyi Huang , Wenjing Xie , Peiyao Liu , Qingwei Yu , Jingying Li , Xinyu Wei , Chunying Jiang , Peixuan Tan , Ding Cao , Ying Tang","doi":"10.1016/j.colsurfa.2025.139173","DOIUrl":"10.1016/j.colsurfa.2025.139173","url":null,"abstract":"<div><div>Green synthetized Ag nanoparticles are increasingly used as antimicrobial agents topically applied to human skin for sanitization and medical purposes. Despite the widespread use, little was known on their antibiofilm efficacy and dermocompatibility. This study reports a systematic investigation into the impacts of green synthetized 0–3D Ag nanostructures, including 0D nanospheres, 1D nanowires, 2D nanoprisms and 3D nanoflowers as well as Ag nanospheres modified by different phytochemicals, on anti-biofilm efficacy and biocompatibility at the nano-skin interface. It was revealed that varying the Ag morphology induces distinct effects on two established polyspecies models consisting of skin-borne microbes (<em>S. aureus-S. epidermidis</em> and <em>S. aureus-C. albicans</em>). Ag nanospheres and nanowires are advantageous in inhibiting the formation of early biofilms (47–61 %) while Ag nanoprisms and nanoflowers are more effective in destroying mature biofilms (68–70 %). ROS-mediated oxidative stress, physical damage to cell membrane integrity, “contact killing” of microbial cells and suppression of adhesion-related gene expression are mechanisms involved in the anti-biofilm actions of these green synthetized Ag nanostructures. Furthermore, the dermocompatibility assessments were performed in reconstructed human epidermis. Although all exposed epidermis models remained > 50 % tissue viability, more Ag nanospheres were transdermally adsorbed than other morphologies while Ag nanoprisms were shown to be more cytotoxic. These findings provide insights into the impacts of 0–3D green synthetized Ag nanostructures on skin-borne polyspecies biofilms and dermocompatibility at the nano-skin interface, highlighting the importance of taking morphology and phytochemical modification into consideration for the rational design of sustainable Ag-based antimicrobials tailored for topical applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139173"},"PeriodicalIF":5.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-04DOI: 10.1016/j.colsurfa.2025.139169
Shenghao Yue , Jixing Bai , Qi Cao , Miao Jiang , Xiangzhou Yuan
Carbon-based electromagnetic wave (EMW) absorbers possess advantageous properties such as low density, tunable conductivity, and excellent environmental stability. However, their EMW absorption capabilities are typically limited due to inherent insufficient loss mechanisms. Morphology optimization represents a promising approach for overcoming this limitation by tuning microstructures to enhance electromagnetic attenuation. Herein, we propose a cost-effective interfacial self-assembly strategy, utilizing interfacial tension among lignin, tetrahydrofuran and water molecules to fabricate spherical carbon-based EMW absorbers. Employing lignin as an abundant and renewable carbon precursor, the resulting microspheres exhibit improved dielectric properties owing to their structural refinement. Control of the rotational speed of stirring during self-assembly further improves sphere size distribution, thereby remarkably enhancing the EMW absorption performance. Specifically, the optimal sample achieves strong reflection loss of −44.28 dB at a thickness as thin as 1.8 mm and effective absorption bandwidth of 3.9 GHz, verifying the considerable performance enhancement by uniform spherical morphology. Radar cross-section simulations additionally confirm its superior far-field EMW absorption capability, further demonstrating the potential of this approach for developing renewable, low-cost and morphology-optimized carbon-based EMW absorbers.
{"title":"Lignin-derived porous carbon microspheres via interfacial self-assembly for superior electromagnetic wave absorption","authors":"Shenghao Yue , Jixing Bai , Qi Cao , Miao Jiang , Xiangzhou Yuan","doi":"10.1016/j.colsurfa.2025.139169","DOIUrl":"10.1016/j.colsurfa.2025.139169","url":null,"abstract":"<div><div>Carbon-based electromagnetic wave (EMW) absorbers possess advantageous properties such as low density, tunable conductivity, and excellent environmental stability. However, their EMW absorption capabilities are typically limited due to inherent insufficient loss mechanisms. Morphology optimization represents a promising approach for overcoming this limitation by tuning microstructures to enhance electromagnetic attenuation. Herein, we propose a cost-effective interfacial self-assembly strategy, utilizing interfacial tension among lignin, tetrahydrofuran and water molecules to fabricate spherical carbon-based EMW absorbers. Employing lignin as an abundant and renewable carbon precursor, the resulting microspheres exhibit improved dielectric properties owing to their structural refinement. Control of the rotational speed of stirring during self-assembly further improves sphere size distribution, thereby remarkably enhancing the EMW absorption performance. Specifically, the optimal sample achieves strong reflection loss of −44.28 dB at a thickness as thin as 1.8 mm and effective absorption bandwidth of 3.9 GHz, verifying the considerable performance enhancement by uniform spherical morphology. Radar cross-section simulations additionally confirm its superior far-field EMW absorption capability, further demonstrating the potential of this approach for developing renewable, low-cost and morphology-optimized carbon-based EMW absorbers.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139169"},"PeriodicalIF":5.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-04DOI: 10.1016/j.colsurfa.2025.139164
Menemşe Gümüşderelioğlu , Murat Şimşek , Derya Kalelioğlu , Anıl Sera Çakmak , Sema Coşkun , Farzin Sana
Effective osseointegration and infection prevention remain critical challenges for metallic implants. In this study, we developed a facile and dual-functional coating strategy by electrospun poly(ethylene oxide) (PEO) fibers incorporated with nano-hydroxyapatite (HA) particles onto pretreated titanium (Ti) surfaces. The HA particles were synthesized via biomimetic precipitation from concentrated simulated body fluid (10 × SBF) under three different conditions: (i) at room temperature (R-HA), (ii) using microwave energy (M-HA), and (iii) in the presence of boric acid (B-HA). Crosslinking with pentaerythritol triacrylate (PETA) under UV irradiation ensured stable fiber coatings. In vitro analyses using MC3T3-E1 pre-osteoblasts and Staphylococcus epidermidis (both biofilm-forming and non-forming strains) strains revealed that while pristine PEO reduced cell attachment, HA incorporation restored proliferation and enhanced osteogenic differentiation, with B-HA showing the highest osteogenic marker expression. Meanwhile, R-HA/PEO coatings exhibited the strongest anti-adhesive effect against bacterial colonization. These results demonstrate that the combination of electrospun PEO fibers with HA—particularly boron-substituted HA—provides a synergistic approach to simultaneously promote bone integration and inhibit bacterial adhesion. This work lays the groundwork for developing smart, long-term implant coatings and highlights the potential for future in vivo studies to validate extended clinical efficacy.
{"title":"Electrospun PEO-based composite coatings containing three varieties of nano-hydroxyapatite for titanium implants: A multifunctional approach to enhancing osteointegration and antibacterial activity","authors":"Menemşe Gümüşderelioğlu , Murat Şimşek , Derya Kalelioğlu , Anıl Sera Çakmak , Sema Coşkun , Farzin Sana","doi":"10.1016/j.colsurfa.2025.139164","DOIUrl":"10.1016/j.colsurfa.2025.139164","url":null,"abstract":"<div><div>Effective osseointegration and infection prevention remain critical challenges for metallic implants. In this study, we developed a facile and dual-functional coating strategy by electrospun poly(ethylene oxide) (PEO) fibers incorporated with nano-hydroxyapatite (HA) particles onto pretreated titanium (Ti) surfaces. The HA particles were synthesized via biomimetic precipitation from concentrated simulated body fluid (10 × SBF) under three different conditions: (i) at room temperature (R-HA), (ii) using microwave energy (M-HA), and (iii) in the presence of boric acid (B-HA). Crosslinking with pentaerythritol triacrylate (PETA) under UV irradiation ensured stable fiber coatings. <em>In vitro</em> analyses using MC3T3-E1 pre-osteoblasts and <em>Staphylococcus epidermidis</em> (both biofilm-forming and non-forming strains) strains revealed that while pristine PEO reduced cell attachment, HA incorporation restored proliferation and enhanced osteogenic differentiation, with B-HA showing the highest osteogenic marker expression. Meanwhile, R-HA/PEO coatings exhibited the strongest anti-adhesive effect against bacterial colonization. These results demonstrate that the combination of electrospun PEO fibers with HA—particularly boron-substituted HA—provides a synergistic approach to simultaneously promote bone integration and inhibit bacterial adhesion. This work lays the groundwork for developing smart, long-term implant coatings and highlights the potential for future <em>in vivo</em> studies to validate extended clinical efficacy.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139164"},"PeriodicalIF":5.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The development of low-cost, durable trifunctional electrocatalysts was critical for advancing microbial fuel cell and electrolysis cell (MFC/MEC) technology. Such catalysts needed to simultaneously optimize oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), and oxygen evolution reaction (OER) activities to enhance system performance. In this study, a series of cobalt-aluminum layered double hydroxide@zirconium metal–organic framework (CoAl-LDH@Zr-MOF) were synthesized via a hydrothermal method, with CoAl-LDH adsorbed onto Zr-MOF. Specifically, CoAl-LDH@Zr-MOF-4 exhibited a unique ‘layered-framework’ heterostructure, where Zr-MOF was either intercalated into the pores of CoAl-LDH or coated on its surface. The heterostructure increased active site availability while reducing ion diffusion resistance. This dual effect stemmed from the combined utilization of LDH interlayers for rapid ion exchange and MOF pores for directional transport. Electrochemical tests revealed outstanding ORR kinetics for CoAl-LDH@Zr-MOF-4, reflected by a low Tafel slope of 34.2 mV/dec and high stability. In a 1 M KOH, CoAl-LDH@Zr-MOF-4 also exhibited outstanding bifunctional electrocatalytic activity for both HER and OER. Under 10 mA/cm², the overpotential for the HER was only 111 mV, and the overpotential for the OER was 205 mV, both of which were much lower than those of single CoAl-LDH and Zr-MOF. Even at a high current density of 100 mA/cm², the HER overpotential was only 242 mV, and the Tafel slope for HER was as low as 60.0 mV/dec. Furthermore, chronoamperometric testing confirmed that CoAl-LDH@Zr-MOF-4 sustained stable catalytic performance over 33 h of continuous operation. These good characteristics fully indicated that CoAl-LDH@Zr-MOF-4 was a very promising trifunctional electrocatalyst.
{"title":"Integration of cobalt-aluminum layered double hydroxide with a zirconium metal-organic framework for oxygen reduction, evolution and hydrogen evolution reaction","authors":"Feng Lan, Jiahui Sun, Jingru Zhang, Yuchen Cao, Renjun Wang, Junfeng Chen","doi":"10.1016/j.colsurfa.2025.139166","DOIUrl":"10.1016/j.colsurfa.2025.139166","url":null,"abstract":"<div><div>The development of low-cost, durable trifunctional electrocatalysts was critical for advancing microbial fuel cell and electrolysis cell (MFC/MEC) technology. Such catalysts needed to simultaneously optimize oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), and oxygen evolution reaction (OER) activities to enhance system performance. In this study, a series of cobalt-aluminum layered double hydroxide@zirconium metal–organic framework (CoAl-LDH@Zr-MOF) were synthesized via a hydrothermal method, with CoAl-LDH adsorbed onto Zr-MOF. Specifically, CoAl-LDH@Zr-MOF-4 exhibited a unique ‘layered-framework’ heterostructure, where Zr-MOF was either intercalated into the pores of CoAl-LDH or coated on its surface. The heterostructure increased active site availability while reducing ion diffusion resistance. This dual effect stemmed from the combined utilization of LDH interlayers for rapid ion exchange and MOF pores for directional transport. Electrochemical tests revealed outstanding ORR kinetics for CoAl-LDH@Zr-MOF-4, reflected by a low Tafel slope of 34.2 mV/dec and high stability. In a 1 M KOH, CoAl-LDH@Zr-MOF-4 also exhibited outstanding bifunctional electrocatalytic activity for both HER and OER. Under 10 mA/cm², the overpotential for the HER was only 111 mV, and the overpotential for the OER was 205 mV, both of which were much lower than those of single CoAl-LDH and Zr-MOF. Even at a high current density of 100 mA/cm², the HER overpotential was only 242 mV, and the Tafel slope for HER was as low as 60.0 mV/dec. Furthermore, chronoamperometric testing confirmed that CoAl-LDH@Zr-MOF-4 sustained stable catalytic performance over 33 h of continuous operation. These good characteristics fully indicated that CoAl-LDH@Zr-MOF-4 was a very promising trifunctional electrocatalyst.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139166"},"PeriodicalIF":5.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-04DOI: 10.1016/j.colsurfa.2025.139135
Yong Liu , Yejun Deng , Pujun Xie , Xiang Wang , Caihong Zhang , Lixin Huang
While inorganic copper-based fungicides effectively control citrus canker, their poor leaf adhesion and deposition lead to significant waste and copper pollution. To address this issue, we developed a novel, natural, and efficient antibacterial agent, Gleditsia sinensis Lam. saponin-copper chelate (GSS-Cu). The physicochemical properties of GSS-Cu were characterized by EDS, FTIR, XRD, TG, DSC, and pH stability tests. Results revealed that GSS primarily chelates Cu2 + via hydroxyl groups, forming an amorphous complex with enhanced stability in alkaline conditions (85.16 ± 2.35 % solubility at pH 10 compared to 0.70 ± 0.084 % for CuSO4). Molecular docking further revealed hydrogen bonding between saponin and Cu2+, providing the first evidence for metal ion chelation by saponins. GSS-Cu also exhibited good wettability on citrus leaves, with a contact angle of 45.63°±0.29°, significantly lower than CuSO4 (80.67°±0.51°) and Bordeaux mixture (BM) (85.64°±0.58°). GSS-Cu achieved higher copper deposition (18.40 ± 1.63 μg/cm2) and rainfastness (43.10 ± 2.59 %) than CuSO4 (10.83 ± 0.92 μg/cm2, 20.61 ± 2.50 %) and BM (17.34 ± 0.98 μg/cm2, 32.05 ± 4.31 %), attributed to its ability to wet hydrophobic citrus leaves effectively and form a durable, rainfastness protective layer. In antibacterial tests against Xanthomonas citri subsp. citri, GSS-Cu showed an EC50 of 31.54 ± 6.11 μg/mL, 3.4 and 4.0 times more potent than CuSO4 (106.46 ± 14.43 μg/mL) and BM (124.92 ± 1.55 μg/mL), respectively. Its efficacy is linked to the induction of reactive oxygen species. Additionally, GSS-Cu caused no phytotoxicity to citrus leaves and was rapidly adsorbed by soil (>75 % within 4 h), indicating favorable environmental compatibility. With its lower copper usage, good wettability, adhesion, antimicrobial activity, and eco-friendly profile, GSS-Cu represents a promising agrochemical.
{"title":"A novel copper-based fungicide with enhanced hydrophobic leaf deposition and antimicrobial activities","authors":"Yong Liu , Yejun Deng , Pujun Xie , Xiang Wang , Caihong Zhang , Lixin Huang","doi":"10.1016/j.colsurfa.2025.139135","DOIUrl":"10.1016/j.colsurfa.2025.139135","url":null,"abstract":"<div><div>While inorganic copper-based fungicides effectively control citrus canker, their poor leaf adhesion and deposition lead to significant waste and copper pollution. To address this issue, we developed a novel, natural, and efficient antibacterial agent, <em>Gleditsia sinensis</em> Lam. saponin-copper chelate (GSS-Cu). The physicochemical properties of GSS-Cu were characterized by EDS, FTIR, XRD, TG, DSC, and pH stability tests. Results revealed that GSS primarily chelates Cu<sup>2 +</sup> via hydroxyl groups, forming an amorphous complex with enhanced stability in alkaline conditions (85.16 ± 2.35 % solubility at pH 10 compared to 0.70 ± 0.084 % for CuSO<sub>4</sub>). Molecular docking further revealed hydrogen bonding between saponin and Cu<sup>2+</sup>, providing the first evidence for metal ion chelation by saponins. GSS-Cu also exhibited good wettability on citrus leaves, with a contact angle of 45.63<sup>°</sup>±0.29<sup>°</sup>, significantly lower than CuSO<sub>4</sub> (80.67<sup>°</sup>±0.51<sup>°</sup>) and Bordeaux mixture (BM) (85.64<sup>°</sup>±0.58<sup>°</sup>). GSS-Cu achieved higher copper deposition (18.40 ± 1.63 μg/cm<sup>2</sup>) and rainfastness (43.10 ± 2.59 %) than CuSO<sub>4</sub> (10.83 ± 0.92 μg/cm<sup>2</sup>, 20.61 ± 2.50 %) and BM (17.34 ± 0.98 μg/cm<sup>2</sup>, 32.05 ± 4.31 %), attributed to its ability to wet hydrophobic citrus leaves effectively and form a durable, rainfastness protective layer. In antibacterial tests against <em>Xanthomonas citri subsp. citri</em>, GSS-Cu showed an EC<sub>50</sub> of 31.54 ± 6.11 μg/mL, 3.4 and 4.0 times more potent than CuSO<sub>4</sub> (106.46 ± 14.43 μg/mL) and BM (124.92 ± 1.55 μg/mL), respectively. Its efficacy is linked to the induction of reactive oxygen species. Additionally, GSS-Cu caused no phytotoxicity to citrus leaves and was rapidly adsorbed by soil (>75 % within 4 h), indicating favorable environmental compatibility. With its lower copper usage, good wettability, adhesion, antimicrobial activity, and eco-friendly profile, GSS-Cu represents a promising agrochemical.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139135"},"PeriodicalIF":5.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Leelamine (LLA) is a natural diterpene alkaloid with promising anticancer activity, particularly against aggressive cancers such as triple-negative breast cancer. However, its therapeutic potential is limited by poor aqueous solubility, instability, and reduced bioavailability, which hinder its clinical translation. Complexation of LLA with β-Cyclodextrin (BCD) is therefore a necessary strategy to overcome these limitations, enhance its biocompatibility, and potentially augment its anticancer effects. A potentially active water-soluble anti-cancer with biocompatible material from the LLA has been produced in the presence of BCD by the sonication method, and their formation was thoroughly validated using complementary analytical techniques. 1H NMR and ROESY provided direct evidence of complexation, showing that LLA primarily interacts with the outer rim of the BCD cavity rather than achieving complete encapsulation. This observation was further supported by IR, Raman, and NMR analyses, which collectively confirmed the stability of the inclusion complexes (ICs). Surface characterization revealed notable changes in morphology and surface roughness following complex formation. In vitro assays demonstrated that LLA:BCD ICs effectively induced apoptotic cell death in MDA-MB231 triple-negative breast cancer cells, while exhibiting minimal cytotoxicity in normal lung fibroblast cells (MRC-5).
{"title":"Exploring the complexation by β-cyclodextrin for improving the anticancer potential of leelamine: Experimental and computational approach","authors":"Rajaram Rajamohan , Eswaran Kamaraj , Perumal Muthuraja , Sekar Ashokkumar , Kuppusamy Murugavel , Seho Sun","doi":"10.1016/j.colsurfa.2025.139128","DOIUrl":"10.1016/j.colsurfa.2025.139128","url":null,"abstract":"<div><div>Leelamine (LLA) is a natural diterpene alkaloid with promising anticancer activity, particularly against aggressive cancers such as triple-negative breast cancer. However, its therapeutic potential is limited by poor aqueous solubility, instability, and reduced bioavailability, which hinder its clinical translation. Complexation of LLA with β-Cyclodextrin (BCD) is therefore a necessary strategy to overcome these limitations, enhance its biocompatibility, and potentially augment its anticancer effects. A potentially active water-soluble anti-cancer with biocompatible material from the LLA has been produced in the presence of BCD by the sonication method, and their formation was thoroughly validated using complementary analytical techniques. <sup>1</sup>H NMR and ROESY provided direct evidence of complexation, showing that LLA primarily interacts with the outer rim of the BCD cavity rather than achieving complete encapsulation. This observation was further supported by IR, Raman, and NMR analyses, which collectively confirmed the stability of the inclusion complexes (ICs). Surface characterization revealed notable changes in morphology and surface roughness following complex formation. In vitro assays demonstrated that LLA:BCD ICs effectively induced apoptotic cell death in MDA-MB231 triple-negative breast cancer cells, while exhibiting minimal cytotoxicity in normal lung fibroblast cells (MRC-5).</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139128"},"PeriodicalIF":5.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-04DOI: 10.1016/j.colsurfa.2025.139174
Bo Guo , Yushi Yang , Jiaqi Meng , Wu Xiong , Xiaona Liu
A nano-zero-valent iron-loaded Al-based metal-organic framework (nZVI@Al-MOF) was synthesized to remove phosphate and nitrate from water, and its performance under different operating conditions was evaluated. The material exhibited excellent removal efficiency over a broad pH range (3.0–11.0). For sole phosphate removal, the efficiency exceeded 99.5 % at pH 3.0–9.0 and remained 94.8 % even at pH 11.0. For synchronous removal, phosphate and nitrate efficiencies reached over 99.0 % and 96.9 % at pH 7.0, respectively. These superior performances were attributed to the synergy between Fe and Al in nZVI@Al-MOF. Furthermore, the phosphate adsorption process under different conditions was accurately described by the pseudo-second-order adsorption model (R²=0.9969–0.9990), indicating a chemically controlled process. Thermodynamic analysis revealed that this adsorption process was spontaneous, endothermic, and entropy-increasing. DFT calculations revealed that negative/positive electrostatic potentials were concentrated near AlO₆ moieties (Al-MOF) and Fe clusters, respectively. Fe/Al active sites transferred more electrons to PO₄³ ⁻ (1.22 e/1.13 e) than to NO₃⁻ (0.33 e/0.31 e), and adsorption energies (Ead) showed Al sites preferred phosphate (-3.87 eV vs. −1.87 eV for nitrate) while Fe clusters favored nitrate (-4.00 eV vs. −1.91 eV for phosphate). Combined with scanning electron microscope (SEM), Fourier transform infrared spectrometer (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) characterizations, phosphate removal was proposed as coordinate bond-controlled chemical adsorption (driven by Al’s strong coordination and Fe’s electrostatic interaction), whereas nitrate removal was a Fe cluster-controlled reduction reaction (via strong adsorption and electron transfer). Moreover, removals of 98.7 % phosphate and 92.1 % nitrate from Fenhe Park surface water were simultaneously achieved, and nZVI@Al-MOF exhibited good reusability in consecutive adsorption-desorption cycles. It demonstrates that nZVI@Al-MOF is a more efficient adsorbent for alleviating the eutrophication of water.
{"title":"A nano-Fe0-loaded Al-MOF for the removal of phosphate and nitrate over a wide pH range from water: Performance, mechanism and theoretical calculations","authors":"Bo Guo , Yushi Yang , Jiaqi Meng , Wu Xiong , Xiaona Liu","doi":"10.1016/j.colsurfa.2025.139174","DOIUrl":"10.1016/j.colsurfa.2025.139174","url":null,"abstract":"<div><div>A nano-zero-valent iron-loaded Al-based metal-organic framework (nZVI@Al-MOF) was synthesized to remove phosphate and nitrate from water, and its performance under different operating conditions was evaluated. The material exhibited excellent removal efficiency over a broad pH range (3.0–11.0). For sole phosphate removal, the efficiency exceeded 99.5 % at pH 3.0–9.0 and remained 94.8 % even at pH 11.0. For synchronous removal, phosphate and nitrate efficiencies reached over 99.0 % and 96.9 % at pH 7.0, respectively. These superior performances were attributed to the synergy between Fe and Al in nZVI@Al-MOF. Furthermore, the phosphate adsorption process under different conditions was accurately described by the pseudo-second-order adsorption model (R²=0.9969–0.9990), indicating a chemically controlled process. Thermodynamic analysis revealed that this adsorption process was spontaneous, endothermic, and entropy-increasing. DFT calculations revealed that negative/positive electrostatic potentials were concentrated near AlO₆ moieties (Al-MOF) and Fe clusters, respectively. Fe/Al active sites transferred more electrons to PO₄³ ⁻ (1.22 e/1.13 e) than to NO₃⁻ (0.33 e/0.31 e), and adsorption energies (E<sub>ad</sub>) showed Al sites preferred phosphate (-3.87 eV vs. −1.87 eV for nitrate) while Fe clusters favored nitrate (-4.00 eV vs. −1.91 eV for phosphate). Combined with scanning electron microscope (SEM), Fourier transform infrared spectrometer (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) characterizations, phosphate removal was proposed as coordinate bond-controlled chemical adsorption (driven by Al’s strong coordination and Fe’s electrostatic interaction), whereas nitrate removal was a Fe cluster-controlled reduction reaction (via strong adsorption and electron transfer). Moreover, removals of 98.7 % phosphate and 92.1 % nitrate from Fenhe Park surface water were simultaneously achieved, and nZVI@Al-MOF exhibited good reusability in consecutive adsorption-desorption cycles. It demonstrates that nZVI@Al-MOF is a more efficient adsorbent for alleviating the eutrophication of water.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139174"},"PeriodicalIF":5.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-04DOI: 10.1016/j.colsurfa.2025.139139
Muhammad Imran Jamil , Sawera Ayyaz , Waqar Ahmed , Fazal Haq , Muhammad Yousaf , Tahir Iqbal , Sahid Mehmood , Farman Ullah Khan
Organic contaminants such as dyes, drugs, phenol, and oily effluents of the textile sector, pharmaceuticals, and oil spills are the main causes of water pollution. Superhydrophobic coatings are being used for wastewater treatment but possess some drawbacks, such as poor stability in different environmental conditions, reduced absorption capacities, incapability to reuse, and high fabrication cost. In this work, a durable, reusable, self-cleaning, large surface area and low-cost superhydrophobic coating is developed by depositing the candle soot nanoparticles into room temperature vulcanizing silicone binder. Candle soot coated superhydrophobic polyurethane sponge showed a 97 % absorption efficiency for various oils and 96 % for high-viscosity oils in normal and super-cold water. The bare candle soot nanoparticles showed 66.6 %, 77 %, and 60 % adsorption for methylene blue dye, paracetamol, and phenol, respectively which was verified by calculating the interaction energies through density functional theory. Reduced density gradient analysis (RDG) was also performed to figure out the nature of the non-bonding interactions. The soot coated substrate showed increased adsorption 98 %, 91 %, and 94 % for methylene blue dye, paracetamol, and phenol due to its larger contact surface area. The developed soot coating maintained its superhydrophobicity and adsorption capability after five liquid nitrogen-water cycles and contaminants adsorption/desorption cycles. Moreover, the soot coated substrate exhibited a load-bearing capacity greater than that of the bare substrate. The soot coated superhydrophobic sponge maintained the water contact angle 165° and oil contact angle 0° even after immersion in acidic, basic medium, pond water, lake water, super-cold water, artificial sea water, and the fire retardance test. Thus, the developed candle soot coated superhydrophobic surfaces are multifunctional, environment-friendly, reusable, durable, and suitable for large-scale applications even at subzero temperatures.
{"title":"Sustainable carbon soot coatings for efficient oil-water separation and organic pollutants adsorption","authors":"Muhammad Imran Jamil , Sawera Ayyaz , Waqar Ahmed , Fazal Haq , Muhammad Yousaf , Tahir Iqbal , Sahid Mehmood , Farman Ullah Khan","doi":"10.1016/j.colsurfa.2025.139139","DOIUrl":"10.1016/j.colsurfa.2025.139139","url":null,"abstract":"<div><div>Organic contaminants such as dyes, drugs, phenol, and oily effluents of the textile sector, pharmaceuticals, and oil spills are the main causes of water pollution. Superhydrophobic coatings are being used for wastewater treatment but possess some drawbacks, such as poor stability in different environmental conditions, reduced absorption capacities, incapability to reuse, and high fabrication cost. In this work, a durable, reusable, self-cleaning, large surface area and low-cost superhydrophobic coating is developed by depositing the candle soot nanoparticles into room temperature vulcanizing silicone binder. Candle soot coated superhydrophobic polyurethane sponge showed a 97 % absorption efficiency for various oils and 96 % for high-viscosity oils in normal and super-cold water. The bare candle soot nanoparticles showed 66.6 %, 77 %, and 60 % adsorption for methylene blue dye, paracetamol, and phenol, respectively which was verified by calculating the interaction energies through density functional theory. Reduced density gradient analysis (RDG) was also performed to figure out the nature of the non-bonding interactions. The soot coated substrate showed increased adsorption 98 %, 91 %, and 94 % for methylene blue dye, paracetamol, and phenol due to its larger contact surface area. The developed soot coating maintained its superhydrophobicity and adsorption capability after five liquid nitrogen-water cycles and contaminants adsorption/desorption cycles. Moreover, the soot coated substrate exhibited a load-bearing capacity greater than that of the bare substrate. The soot coated superhydrophobic sponge maintained the water contact angle 165° and oil contact angle 0° even after immersion in acidic, basic medium, pond water, lake water, super-cold water, artificial sea water, and the fire retardance test. Thus, the developed candle soot coated superhydrophobic surfaces are multifunctional, environment-friendly, reusable, durable, and suitable for large-scale applications even at subzero temperatures.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"732 ","pages":"Article 139139"},"PeriodicalIF":5.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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