Pub Date : 2026-02-04DOI: 10.1016/j.matchemphys.2026.132183
Musa Çadırcı , Yasemin Gündoğdu Kabakcı , Hamdi Şükür Kılıç
In this study, nonlinear optical (NLO) properties of CsPb(Cl/Br)3 perovskite quantum dots (PQDs) and Zn doped CsPb(Cl/Br)3 PQDs was systematically investigated, discovering its potential for advanced NLO devices. Initially samples were synthesized and characterised using UV-Vis, photoluminescence (PL), and TEM method. Next, open and closed aperture Z-scan experiments and optical limiting evaluations were carried out under varying excitation conditions. We measured that nonlinear absorption (β), nonlinear refractive (n2) indices and third-order nonlinear susceptibility (χ3) for CsPb(Cl/Br)3 PQDs to be on the orders of 10−11 cm/W, 10−16 cm2/W and 10−14 esu, respectively. Interestingly, it has been observed that the NLO properties of Zn -doped samples beings prominent considerably compared to undoped samples, with the rate of increasing as the Zn content. The results show that CsPb(Cl/Br)3 PQDs are remarkable material for applications on the next-generation NLO devices.
{"title":"Zn doped CsPb(Br/Cl)3 nonlinear optical limiting response BY FS laser Z-scanning","authors":"Musa Çadırcı , Yasemin Gündoğdu Kabakcı , Hamdi Şükür Kılıç","doi":"10.1016/j.matchemphys.2026.132183","DOIUrl":"10.1016/j.matchemphys.2026.132183","url":null,"abstract":"<div><div>In this study, nonlinear optical (NLO) properties of CsPb(Cl/Br)<sub>3</sub> perovskite quantum dots (PQDs) and Zn doped CsPb(Cl/Br)<sub>3</sub> PQDs was systematically investigated, discovering its potential for advanced NLO devices. Initially samples were synthesized and characterised using UV-Vis, photoluminescence (PL), and TEM method. Next, open and closed aperture Z-scan experiments and optical limiting evaluations were carried out under varying excitation conditions. We measured that nonlinear absorption (β), nonlinear refractive (n<sub>2</sub>) indices and third-order nonlinear susceptibility (χ<sup>3</sup>) for CsPb(Cl/Br)<sub>3</sub> PQDs to be on the orders of 10<sup>−11</sup> cm/W, 10<sup>−16</sup> cm<sup>2</sup>/W and 10<sup>−14</sup> esu, respectively. Interestingly, it has been observed that the NLO properties of Zn -doped samples beings prominent considerably compared to undoped samples, with the rate of increasing as the Zn content. The results show that CsPb(Cl/Br)<sub>3</sub> PQDs are remarkable material for applications on the next-generation NLO devices.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132183"},"PeriodicalIF":4.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-04DOI: 10.1016/j.matchemphys.2026.132186
Ali Mahmoud, Rahul Gajbhiye, Salaheldin Elkatatny
The exploration of high-pressure and high-temperature (HPHT) hydrocarbon reservoirs requires drilling fluids with high thermal stability, controlled rheology, and effective fluid-loss mitigation. Oil-based drilling fluids (OBDFs) are commonly employed under such conditions; however, maintaining consistent performance at elevated temperature and pressure remains challenging. This study provides a structure–function interpretation of an OBDF system formulated using an equal-ratio blend of two commercially available organoclays (OCs), Claytone-3 (illite based) and Claytone-IMG 400 (montmorillonite based), selected for their contrasting mineralogical compositions and particle morphologies.
The OCs were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), and particle size distribution (PSD) analysis. The 1:1 OC blend was evaluated alongside the individual OCs and a commercial reference formulation (MC-TONE) through laboratory testing, including measurements of density, electrical stability, sag tendency, rheological and viscoelastic properties, and HPHT filtration behavior. The blended system consistently exhibited improved performance relative to the individual OCs, including a 19% increase in electrical stability, a 21% reduction in dynamic sag, a 13% increase in plastic viscosity, a 40% increase in yield point, and reductions in fluid loss (6.5%) and filter cake thickness (12%).
These performance trends are interpreted in terms of complementary structure–function contributions from the illite- and montmorillonite-rich components. The results suggest that mineralogical complementarity is an effective design variable for enhancing OBDF performance under HPHT conditions. This interpretation-driven approach provides practical insight for rational drilling fluid formulation aimed at improving wellbore stability in technically challenging environments.
{"title":"Structure–function analysis of an illite–montmorillonite organoclay blend for HPHT oil-based drilling fluids","authors":"Ali Mahmoud, Rahul Gajbhiye, Salaheldin Elkatatny","doi":"10.1016/j.matchemphys.2026.132186","DOIUrl":"10.1016/j.matchemphys.2026.132186","url":null,"abstract":"<div><div>The exploration of high-pressure and high-temperature (HPHT) hydrocarbon reservoirs requires drilling fluids with high thermal stability, controlled rheology, and effective fluid-loss mitigation. Oil-based drilling fluids (OBDFs) are commonly employed under such conditions; however, maintaining consistent performance at elevated temperature and pressure remains challenging. This study provides a structure–function interpretation of an OBDF system formulated using an equal-ratio blend of two commercially available organoclays (OCs), Claytone-3 (illite based) and Claytone-IMG 400 (montmorillonite based), selected for their contrasting mineralogical compositions and particle morphologies.</div><div>The OCs were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), and particle size distribution (PSD) analysis. The 1:1 OC blend was evaluated alongside the individual OCs and a commercial reference formulation (MC-TONE) through laboratory testing, including measurements of density, electrical stability, sag tendency, rheological and viscoelastic properties, and HPHT filtration behavior. The blended system consistently exhibited improved performance relative to the individual OCs, including a 19% increase in electrical stability, a 21% reduction in dynamic sag, a 13% increase in plastic viscosity, a 40% increase in yield point, and reductions in fluid loss (6.5%) and filter cake thickness (12%).</div><div>These performance trends are interpreted in terms of complementary structure–function contributions from the illite- and montmorillonite-rich components. The results suggest that mineralogical complementarity is an effective design variable for enhancing OBDF performance under HPHT conditions. This interpretation-driven approach provides practical insight for rational drilling fluid formulation aimed at improving wellbore stability in technically challenging environments.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132186"},"PeriodicalIF":4.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Slanted TiO2 nanorod (SNR) films were fabricated by combining reactive gas-timing (RGT) with oblique angle deposition (OAD) in DC magnetron sputtering. The influence of Ar/O2 on-off sequences on film morphology, crystallinity, chemistry, and wettability was systematically investigated. Compared with the conventional continuous gas flow method, the RGT process increased deposition rates up to sevenfold and enabled control of nanorod porosity and surface chemistry. XPS revealed that RGT films contained a higher density of polarizable terminal hydroxyl groups, which act as hole-trapping sites and promote surface reactivity and improve photoinduced wettability. This surface chemistry, despite the amorphous nature of the films, resulted in superior photoinduced hydrophilicity. In particular, the RGT 20:10 condition exhibited a dramatic reduction in water contact angle from 70.2° to 8.2° after UV exposure, with excellent cycling stability. These results demonstrate RGT-OAD as a scalable route for photo-responsive, self-cleaning coatings and transparent device applications.
{"title":"Reactive gas-timing control for photo-responsive TiO2 slanted nanorod films fabricated by oblique angle magnetron sputtering","authors":"Sirilak Wongthawachnugool , Saksorn Limwichean , Tossaporn Lertvanithphol , Viyapol Pattanasettakul , Pacharamon Somboonsaksri , Hideki Nakajima , Mati Horprathum , Napat Triroj , Papot Jaroenapibal","doi":"10.1016/j.matchemphys.2026.132157","DOIUrl":"10.1016/j.matchemphys.2026.132157","url":null,"abstract":"<div><div>Slanted TiO<sub>2</sub> nanorod (SNR) films were fabricated by combining reactive gas-timing (RGT) with oblique angle deposition (OAD) in DC magnetron sputtering. The influence of Ar/O<sub>2</sub> on-off sequences on film morphology, crystallinity, chemistry, and wettability was systematically investigated. Compared with the conventional continuous gas flow method, the RGT process increased deposition rates up to sevenfold and enabled control of nanorod porosity and surface chemistry. XPS revealed that RGT films contained a higher density of polarizable terminal hydroxyl groups, which act as hole-trapping sites and promote surface reactivity and improve photoinduced wettability. This surface chemistry, despite the amorphous nature of the films, resulted in superior photoinduced hydrophilicity. In particular, the RGT 20:10 condition exhibited a dramatic reduction in water contact angle from 70.2° to 8.2° after UV exposure, with excellent cycling stability. These results demonstrate RGT-OAD as a scalable route for photo-responsive, self-cleaning coatings and transparent device applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132157"},"PeriodicalIF":4.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-04DOI: 10.1016/j.matchemphys.2026.132140
R. Ramesh , Saurabh Gairola , R. Jayaganthan , M. Kamaraj
The present study focuses on AlSi9Cu3 alloy produced using the Laser Powder Bed Fusion (LPBF). The components produced using LPBF have higher dislocation density due to cyclic heating that occurs during printing. Heat Treatment is crucial for lowering the dislocation density by homogenising the microstructure and enhancing mechanical properties. The alloy in its as-built condition is subjected to various heat treatments (stress relief, solution treatment and T6 aging treatment) and the hardness, tensile strength, and fracture toughness, along with their corresponding strengthening mechanisms, were examined in relation to its microstructural evolution. The alloy in as-built condition exhibits a hardness of 137 HV and a tensile strength of 487 MPa, attributed to the presence of Si network and a higher dislocation density. Stress relief treatment reduced the strength and hardness due to the fragmentation of the Si network, while solution treatment homogenized the microstructure. In the T6 condition, the formation of very fine Al2Cu precipitates restores the hardness, tensile strength, and fracture toughness. Dislocation and Si-network strengthening, as well as precipitation strengthening mechanisms, are the dominant mechanisms in the as-built condition and T6 conditions, respectively.
{"title":"Influence of heat treatment on the microstructural evolution, mechanical behaviour and strengthening mechanisms of additively manufactured AlSi9Cu3 alloy","authors":"R. Ramesh , Saurabh Gairola , R. Jayaganthan , M. Kamaraj","doi":"10.1016/j.matchemphys.2026.132140","DOIUrl":"10.1016/j.matchemphys.2026.132140","url":null,"abstract":"<div><div>The present study focuses on AlSi9Cu3 alloy produced using the Laser Powder Bed Fusion (LPBF). The components produced using LPBF have higher dislocation density due to cyclic heating that occurs during printing. Heat Treatment is crucial for lowering the dislocation density by homogenising the microstructure and enhancing mechanical properties. The alloy in its as-built condition is subjected to various heat treatments (stress relief, solution treatment and T6 aging treatment) and the hardness, tensile strength, and fracture toughness, along with their corresponding strengthening mechanisms, were examined in relation to its microstructural evolution. The alloy in as-built condition exhibits a hardness of 137 HV and a tensile strength of 487 MPa, attributed to the presence of Si network and a higher dislocation density. Stress relief treatment reduced the strength and hardness due to the fragmentation of the Si network, while solution treatment homogenized the microstructure. In the T6 condition, the formation of very fine Al<sub>2</sub>Cu precipitates restores the hardness, tensile strength, and fracture toughness. Dislocation and Si-network strengthening, as well as precipitation strengthening mechanisms, are the dominant mechanisms in the as-built condition and T6 conditions, respectively.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132140"},"PeriodicalIF":4.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-03DOI: 10.1016/j.matchemphys.2026.132174
Nihad Ibrahim Mohammed Abdallah , Xuqiang Zhang , Qiong Lu , Tengwei Huang , Fengxia Yang , Xiaofei Dong , Yun Zhao , Jiangtao Chen , Yan Li
To tackle the pressing demand for effective remediation of organic dye-contaminates, selective adsorption has emerged as a research focus, celebrated for its cost-efficiency and high specificity. In this study, ternary metal sulfide AgBiS2, synthesized via a facile hydrothermal approach, is employed as novel adsorbents, with the innovative aim of exploring their selective adsorption behavior to charge dyes and the underly mechanisms. AgBiS2 demonstrates significantly higher adsorption capacity and faster kinetics for cationic Rhodamine B (RhB) compared to anionic methyl orange (MO). With 10 mg L−1 of initial concentration, the removal efficiency of RhB reaches 99.9 % within 60 min, in contrast to 57.7 % for MO, and RhB adsorption achieves near-equilibrium rapidly. The material also displays distinct pH-dependent selectivity in RhB adsorption, including the highest adsorption capacity reaches to 101.5 mg g−1 under alkaline conditions, while the minimum is 32.4 mg g−1 in an acidic environment. Kinetic analyses reveal that RhB adsorption obeys a pseudo-second-order model, suggesting chemisorption as the dominant mechanism, and adsorption data fit the Langmuir isotherm best, with a capacity of 106.9 mg g−1 at pH = 7.5. Systematically characterizations reveal that abundant S2− sites on the surface of AgBiS2 are identified as crucial for the high-selective adsorption of RhB, mainly via electrostatic interactions. This study provides valuable support for the design of high-performance ternary sulfide adsorbents for treating dye wastewater.
为了解决有效修复有机染料污染的迫切需求，选择性吸附因其成本效益和高特异性而成为研究热点。本研究采用易水热法合成三元金属硫化物AgBiS2作为新型吸附剂，探索其对带电染料的选择性吸附行为及其机理。与阴离子甲基橙（MO）相比，AgBiS2对阳离子罗丹明B （RhB）具有更高的吸附能力和更快的吸附动力学。当初始浓度为10 mg L−1时，60 min内RhB的去除率达到99.9%，MO的去除率为57.7%，RhB的吸附迅速达到接近平衡。该材料对RhB的吸附也表现出明显的ph依赖性，在碱性条件下吸附量最高可达101.5 mg g - 1，而在酸性环境下吸附量最低为32.4 mg g - 1。动力学分析表明，RhB的吸附服从准二级模型，化学吸附是主要的吸附机理，吸附数据最符合Langmuir等温线，pH = 7.5时吸附量为106.9 mg g−1。系统表征表明，AgBiS2表面丰富的S2−位点对RhB的高选择性吸附至关重要，主要是通过静电相互作用。该研究为设计高性能三元硫化物吸附剂处理染料废水提供了有价值的支持。
{"title":"Ultra-selective and highly efficient adsorption of anionic/cationic dye by AgBiS2 and mechanistic analysis","authors":"Nihad Ibrahim Mohammed Abdallah , Xuqiang Zhang , Qiong Lu , Tengwei Huang , Fengxia Yang , Xiaofei Dong , Yun Zhao , Jiangtao Chen , Yan Li","doi":"10.1016/j.matchemphys.2026.132174","DOIUrl":"10.1016/j.matchemphys.2026.132174","url":null,"abstract":"<div><div>To tackle the pressing demand for effective remediation of organic dye-contaminates, selective adsorption has emerged as a research focus, celebrated for its cost-efficiency and high specificity. In this study, ternary metal sulfide AgBiS<sub>2</sub>, synthesized via a facile hydrothermal approach, is employed as novel adsorbents, with the innovative aim of exploring their selective adsorption behavior to charge dyes and the underly mechanisms. AgBiS<sub>2</sub> demonstrates significantly higher adsorption capacity and faster kinetics for cationic Rhodamine B (RhB) compared to anionic methyl orange (MO). With 10 mg L<sup>−1</sup> of initial concentration, the removal efficiency of RhB reaches 99.9 % within 60 min, in contrast to 57.7 % for MO, and RhB adsorption achieves near-equilibrium rapidly. The material also displays distinct pH-dependent selectivity in RhB adsorption, including the highest adsorption capacity reaches to 101.5 mg g<sup>−1</sup> under alkaline conditions, while the minimum is 32.4 mg g<sup>−1</sup> in an acidic environment. Kinetic analyses reveal that RhB adsorption obeys a pseudo-second-order model, suggesting chemisorption as the dominant mechanism, and adsorption data fit the Langmuir isotherm best, with a capacity of 106.9 mg g<sup>−1</sup> at pH = 7.5. Systematically characterizations reveal that abundant S<sup>2−</sup> sites on the surface of AgBiS<sub>2</sub> are identified as crucial for the high-selective adsorption of RhB, mainly via electrostatic interactions. This study provides valuable support for the design of high-performance ternary sulfide adsorbents for treating dye wastewater.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132174"},"PeriodicalIF":4.7,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-03DOI: 10.1016/j.matchemphys.2026.132067
Hossein Jamali Paghaleh , Shohreh Jahani , Mehran Moradalizadeh , Mohammad Mehdi Foroughi
An electrochemical sensor was created in this work to detect the herbicides isoproturon and diuron at the same time. The sensor was created by combining a platinum-gold bimetallic nanoparticle-decorated three-dimensional reduced graphene oxide (Pt-Au Bm-NPs/3D rGO) nanocomposite, which acted as an effective electrocatalyst, with a screen-printed electrode (SPE). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to analyze the modified electrode's electrochemical characteristics. Because of its many active sites, low charge-transfer resistance, and quick electron transfer, the new Pt-Au Bm-NPs/3D rGO nanocomposite has remarkable electrocatalytic activity. Differential pulse voltammetry (DPV) and CV methods were used to evaluate the sensor's isoproturon detection capabilities. The modified electrode was also used to detect isoproturon when diuron was present. With linear ranges of 0.001–700.0 μM, and detection limits (LOD) of 0.19 nM and 0.22 nM for isoproturon and diuron, respectively, the sensor showed exceptional sensitivity under ideal circumstances. Additionally, when used on agricultural items, the sensor showed outstanding precision and dependability, demonstrating its potential for practical uses.
{"title":"Electrochemical sensor based on Pt-Au nanoparticles-decorated 3D reduced graphene-modified screen-printed electrode for simultaneous determination of herbicides isoproturon and diuron in agricultural products","authors":"Hossein Jamali Paghaleh , Shohreh Jahani , Mehran Moradalizadeh , Mohammad Mehdi Foroughi","doi":"10.1016/j.matchemphys.2026.132067","DOIUrl":"10.1016/j.matchemphys.2026.132067","url":null,"abstract":"<div><div>An electrochemical sensor was created in this work to detect the herbicides isoproturon and diuron at the same time. The sensor was created by combining a platinum-gold bimetallic nanoparticle-decorated three-dimensional reduced graphene oxide (Pt-Au Bm-NPs/3D rGO) nanocomposite, which acted as an effective electrocatalyst, with a screen-printed electrode (SPE). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to analyze the modified electrode's electrochemical characteristics. Because of its many active sites, low charge-transfer resistance, and quick electron transfer, the new Pt-Au Bm-NPs/3D rGO nanocomposite has remarkable electrocatalytic activity. Differential pulse voltammetry (DPV) and CV methods were used to evaluate the sensor's isoproturon detection capabilities. The modified electrode was also used to detect isoproturon when diuron was present. With linear ranges of 0.001–700.0 μM, and detection limits (LOD) of 0.19 nM and 0.22 nM for isoproturon and diuron, respectively, the sensor showed exceptional sensitivity under ideal circumstances. Additionally, when used on agricultural items, the sensor showed outstanding precision and dependability, demonstrating its potential for practical uses.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132067"},"PeriodicalIF":4.7,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-02DOI: 10.1016/j.matchemphys.2026.132164
Magdalena Parlinska-Wojtan , Joanna Depciuch , Tomasz Roman Tarnawski , Kamil Sobczak , Mirosława Pawlyta
Liquid cell transmission electron microscopy (LC-TEM) was used to perform in-situ synthesis of gold nanoparticles (Au NPs) on ceria spherical clusters (ceria SCs) supports. Two experiments were performed: i) dynamic – with a flow of the HAuCl4 solution through the liquid cell, where a fast growth of large, stellated Au NPs was observed in different cell's areas; ii) static – where the liquid cell was filled with the HAuCl4 solution (without flow), resulting in synthesis of Au NPs only in the illuminated area. This allowed us to demonstrate how far reaches the lateral range of the electron beam's interaction within the cell. Additionally, we show differences in the morphology of the Au NPs that were synthesized on the top and the bottom e-chips as a result of the electron beam scattering within the liquid layer of the cell. The associated effect of radical species generation inside the liquid cell by the electron beam was also investigated – at high dose rates and low gold solution flow rates, high concentration of radical species is generated leading to dissolution of the ceria SCs. High flow rates of the HAuCl4 solution drive the growth of large Au NPs with ceria SCs remaining intact.
{"title":"Synthesis, dissolution and Au decoration of CexOy spherical clusters by in-situ liquid cell TEM","authors":"Magdalena Parlinska-Wojtan , Joanna Depciuch , Tomasz Roman Tarnawski , Kamil Sobczak , Mirosława Pawlyta","doi":"10.1016/j.matchemphys.2026.132164","DOIUrl":"10.1016/j.matchemphys.2026.132164","url":null,"abstract":"<div><div>Liquid cell transmission electron microscopy (LC-TEM) was used to perform <em>in-situ</em> synthesis of gold nanoparticles (Au NPs) on ceria spherical clusters (ceria SCs) supports. Two experiments were performed: i) dynamic – with a flow of the HAuCl<sub>4</sub> solution through the liquid cell, where a fast growth of large, stellated Au NPs was observed in different cell's areas; ii) static – where the liquid cell was filled with the HAuCl<sub>4</sub> solution (without flow), resulting in synthesis of Au NPs only in the illuminated area. This allowed us to demonstrate how far reaches the lateral range of the electron beam's interaction within the cell. Additionally, we show differences in the morphology of the Au NPs that were synthesized on the top and the bottom e-chips as a result of the electron beam scattering within the liquid layer of the cell. The associated effect of radical species generation inside the liquid cell by the electron beam was also investigated – at high dose rates and low gold solution flow rates, high concentration of radical species is generated leading to dissolution of the ceria SCs. High flow rates of the HAuCl<sub>4</sub> solution drive the growth of large Au NPs with ceria SCs remaining intact.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132164"},"PeriodicalIF":4.7,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-02DOI: 10.1016/j.matchemphys.2026.132134
Amanda de S.M. de Freitas , Rafael P. Ribeiro , Jéssica S. Rodrigues , Janine S.G. de Camargo , Elidiane C. Rangel , Adriana O. Delgado-Silva
This study investigates the modification of cellulose wettability through sequential plasma etching and film deposition to achieve superhydrophobic surfaces with tunable adhesion. The plasma treatment is a clean, solvent-free method that eliminates the need for hazardous chemicals, aligning with sustainable material development. Kraft cellulose samples were etched with oxygen plasma to generate nanoscale surface features and subsequently coated with hexamethyldisiloxane (HMDSO) films via plasma-enhanced chemical vapor deposition (PECVD). The effects of etching time and film thickness on surface properties were evaluated using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), infrared reflection absorption spectroscopy (IRRAS), profilometry, and contact angle measurements. Oxygen plasma etching significantly altered the cellulose microstructure by increasing roughness and producing nanostructures. HMDSO deposition further modified surface chemistry, yielding water contact angles of ∼150° and diiodomethane contact angles of ∼120°. Among the tested conditions, the 144 nm HMDSO film showed optimal performance, preserving the nano-textured morphology and maintaining a stable superhydrophobic state over the aging period evaluated (45 days), with a contact angle hysteresis of ∼9° and a sliding (roll-off) angle of ∼7°. The combination of etching times (0–60 min) and HMDSO film thicknesses (144–910 nm) generated a broad range of adhesion levels — from pinned droplets that did not roll off even at 90° tilt to very low-adhesion surfaces — demonstrating highly tunable interfacial behavior. Overall, the integration of oxygen plasma etching and HMDSO film deposition provided an effective and environmentally friendly strategy for engineering cellulose surfaces. These modified surfaces have potential applications in self-cleaning materials, antifouling coatings, and lab-on-paper devices, highlighting the promise of plasma-based technologies for advancing functional cellulose-based materials with adaptable adhesion properties.
{"title":"Green plasma engineering of cellulose surfaces for superhydrophobicity and tunable adhesion","authors":"Amanda de S.M. de Freitas , Rafael P. Ribeiro , Jéssica S. Rodrigues , Janine S.G. de Camargo , Elidiane C. Rangel , Adriana O. Delgado-Silva","doi":"10.1016/j.matchemphys.2026.132134","DOIUrl":"10.1016/j.matchemphys.2026.132134","url":null,"abstract":"<div><div>This study investigates the modification of cellulose wettability through sequential plasma etching and film deposition to achieve superhydrophobic surfaces with tunable adhesion. The plasma treatment is a clean, solvent-free method that eliminates the need for hazardous chemicals, aligning with sustainable material development. Kraft cellulose samples were etched with oxygen plasma to generate nanoscale surface features and subsequently coated with hexamethyldisiloxane (HMDSO) films via plasma-enhanced chemical vapor deposition (PECVD). The effects of etching time and film thickness on surface properties were evaluated using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), infrared reflection absorption spectroscopy (IRRAS), profilometry, and contact angle measurements. Oxygen plasma etching significantly altered the cellulose microstructure by increasing roughness and producing nanostructures. HMDSO deposition further modified surface chemistry, yielding water contact angles of ∼150° and diiodomethane contact angles of ∼120°. Among the tested conditions, the 144 nm HMDSO film showed optimal performance, preserving the nano-textured morphology and maintaining a stable superhydrophobic state over the aging period evaluated (45 days), with a contact angle hysteresis of ∼9° and a sliding (roll-off) angle of ∼7°. The combination of etching times (0–60 min) and HMDSO film thicknesses (144–910 nm) generated a broad range of adhesion levels — from pinned droplets that did not roll off even at 90° tilt to very low-adhesion surfaces — demonstrating highly tunable interfacial behavior. Overall, the integration of oxygen plasma etching and HMDSO film deposition provided an effective and environmentally friendly strategy for engineering cellulose surfaces. These modified surfaces have potential applications in self-cleaning materials, antifouling coatings, and lab-on-paper devices, highlighting the promise of plasma-based technologies for advancing functional cellulose-based materials with adaptable adhesion properties.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"353 ","pages":"Article 132134"},"PeriodicalIF":4.7,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-02DOI: 10.1016/j.matchemphys.2026.132166
Xinying Huang , Zhengfeng Xie , Songsong Xue , Tao Liu , Tianyi Zhang , Yujie Hu , Rui Zhang , Xuanchi Tian , Chaocheng Ma , Chuxiang Zhou , Gang Wu , Wei Shi
Expanded polystyrene (EPS) poses significant environmental challenges, necessitating efficient, low-energy recycling solutions. In this study, formylated EPS was used as the modified substrate, and a high-performance adsorption material (HPS-EC) was constructed through Knoevenagel condensation. The modification process adopts the conventional solvent heating method, which is simple and easy to implement with low energy consumption. At 298.15 K, the adsorption capacities of HPS-EC for MG and sulfides are 1846.79 mg/g and 136.94 mg/g, respectively. The adsorption processes of the two pollutants both conform to the Langmuir adsorption model and the quasi-second-order dynamic model, presenting as spontaneous and endothermic monolayer chemical adsorption. HPS-EC has a polystyrene skeleton chain, and the CC in the synthetic part is also connected to two strong electron-withdrawing groups, –CN and –COOR. –COOR and aromatic hydrocarbons provide conditions for the electrostatic adsorption and π-π conjugated adsorption of MG. The β-carbon atoms connected with strong electron-withdrawing groups exhibit a strong electrophilicity, providing sites for the Michael addition of sulfides (HS−, S2−). In the subsequent experiments, HPS-EC also demonstrated excellent salt resistance, recycling and regeneration performance, as well as practical application potential. In conclusion, HPS-EC demonstrates outstanding adsorption performance, not only showing broad application prospects in the treatment of polluted wastewater, but also providing more solutions for the sustainable application of waste EPS.
{"title":"From white pollutants to wastewater purifiers: Performance study and mechanism analysis of formylated polystyrene adsorption materials for the removal of malachite green and sulfides from water bodies","authors":"Xinying Huang , Zhengfeng Xie , Songsong Xue , Tao Liu , Tianyi Zhang , Yujie Hu , Rui Zhang , Xuanchi Tian , Chaocheng Ma , Chuxiang Zhou , Gang Wu , Wei Shi","doi":"10.1016/j.matchemphys.2026.132166","DOIUrl":"10.1016/j.matchemphys.2026.132166","url":null,"abstract":"<div><div>Expanded polystyrene (EPS) poses significant environmental challenges, necessitating efficient, low-energy recycling solutions. In this study, formylated EPS was used as the modified substrate, and a high-performance adsorption material (HPS-EC) was constructed through Knoevenagel condensation. The modification process adopts the conventional solvent heating method, which is simple and easy to implement with low energy consumption. At 298.15 K, the adsorption capacities of HPS-EC for MG and sulfides are 1846.79 mg/g and 136.94 mg/g, respectively. The adsorption processes of the two pollutants both conform to the Langmuir adsorption model and the quasi-second-order dynamic model, presenting as spontaneous and endothermic monolayer chemical adsorption. HPS-EC has a polystyrene skeleton chain, and the C<img>C in the synthetic part is also connected to two strong electron-withdrawing groups, –CN and –COOR. –COOR and aromatic hydrocarbons provide conditions for the electrostatic adsorption and π-π conjugated adsorption of MG. The β-carbon atoms connected with strong electron-withdrawing groups exhibit a strong electrophilicity, providing sites for the Michael addition of sulfides (HS<sup>−</sup>, S<sup>2−</sup>). In the subsequent experiments, HPS-EC also demonstrated excellent salt resistance, recycling and regeneration performance, as well as practical application potential. In conclusion, HPS-EC demonstrates outstanding adsorption performance, not only showing broad application prospects in the treatment of polluted wastewater, but also providing more solutions for the sustainable application of waste EPS.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132166"},"PeriodicalIF":4.7,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-02DOI: 10.1016/j.matchemphys.2026.132161
Hanyu Zhang , Fei Wang , Xinyu Wang , Yuyao Li , Jiahui Li , Ming Tian , Kuan Luo , Zhongmin Su
To overcome the prolonged processing time and high energy consumption issues in conventional polyacrylonitrile (PAN)-based carbon fiber production, this study presents an advanced laser stabilization technique employing uniform-intensity laser irradiation. Through color difference analysis and chemical analysis methods, the color evolution process of polyacrylonitrile fibers after laser pre-oxidation was studied, and the temperature characteristics of laser irradiated PAN-based pre-oxidized fibers of different colors were analyzed and discussed. To solve the problems of low absorption rate of near-infrared laser by polyacrylonitrile fibers and easy melting during irradiation, starting from the absorption characteristics of laser at different pre-oxidation stages, a long-wave infrared 10.6 μm laser pre-irradiation scheme was proposed. Subsequently, a three-stage 976 nm near-infrared laser treatment with precise modulation of the critical stable temperature was carried out to optimize the stability effect.The resulting laser-stabilized fibers demonstrate exceptional quality with a Raman R-value of 1.78, reduced crystallite size (2.08 nm), achieving 98.3% stabilization index and 8.04% oxygen content, marking significant improvements in both structural characteristics and processing efficiency over conventional methods.
{"title":"Laser stabilization of polyacrylonitrile fibers","authors":"Hanyu Zhang , Fei Wang , Xinyu Wang , Yuyao Li , Jiahui Li , Ming Tian , Kuan Luo , Zhongmin Su","doi":"10.1016/j.matchemphys.2026.132161","DOIUrl":"10.1016/j.matchemphys.2026.132161","url":null,"abstract":"<div><div>To overcome the prolonged processing time and high energy consumption issues in conventional polyacrylonitrile (PAN)-based carbon fiber production, this study presents an advanced laser stabilization technique employing uniform-intensity laser irradiation. Through color difference analysis and chemical analysis methods, the color evolution process of polyacrylonitrile fibers after laser pre-oxidation was studied, and the temperature characteristics of laser irradiated PAN-based pre-oxidized fibers of different colors were analyzed and discussed. To solve the problems of low absorption rate of near-infrared laser by polyacrylonitrile fibers and easy melting during irradiation, starting from the absorption characteristics of laser at different pre-oxidation stages, a long-wave infrared 10.6 μm laser pre-irradiation scheme was proposed. Subsequently, a three-stage 976 nm near-infrared laser treatment with precise modulation of the critical stable temperature was carried out to optimize the stability effect.The resulting laser-stabilized fibers demonstrate exceptional quality with a Raman R-value of 1.78, reduced crystallite size (2.08 nm), achieving 98.3% stabilization index and 8.04% oxygen content, marking significant improvements in both structural characteristics and processing efficiency over conventional methods.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132161"},"PeriodicalIF":4.7,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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