Pub Date : 2025-02-25DOI: 10.1021/acs.langmuir.5c0052910.1021/acs.langmuir.5c00529
Greco González Miera*, and , Gilbert C. Walker*,
{"title":"Langmuir Announces an Annual Series of Special Issues Honoring Pioneers in Applied and Fundamental Interfacial Chemistry (PAFICs)","authors":"Greco González Miera*, and , Gilbert C. Walker*, ","doi":"10.1021/acs.langmuir.5c0052910.1021/acs.langmuir.5c00529","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00529https://doi.org/10.1021/acs.langmuir.5c00529","url":null,"abstract":"","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 7","pages":"4401–4402 4401–4402"},"PeriodicalIF":3.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478244","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 : 2025-02-25DOI: 10.1021/acs.langmuir.5c00035
Lingling Zou, Meihua Zhu, Xinpeng Li, Yin Yang, Qi Zhou, Wenjun Yuan, Na Hu, Xiangshu Chen, Hidetoshi Kita
Construction of hierarchical pore structure in supported titanium silicalites was an effective strategy to enhance catalytic performance and avoid the separation process in industrial applications. Herein, the hierarchical TS-2 zeolites were successfully prepared on the TiO2-modified α-Al2O3 pellets by “bottom-up” method, which had good and stable catalytic performance for the allyl chloride epoxidation. TritonX-100 could construct a mesopore structure, restrain nucleation, and affect titanium coordination of the zeolites, which was beneficial for preparing large size, much hexa-coordination titanium content, and hierarchically supported TS-2 zeolites in this work. Besides, the TiO2-modified layer greatly increased the density and surface reactivity of hydroxyl groups on the α-Al2O3 pellet, which were well-situated to prepare homogeneous and anatase-free hierarchical TS-2 zeolite layers. The hierarchically supported TS-2 zeolites were applied to the epoxidation of allyl chloride with hydrogen peroxide, and allyl chloride conversion and epichlorohydrin selectivity were up to 99.13% and 96.53%, respectively.
{"title":"Synthesis of Hierarchically Supported TS-2 Zeolites and Catalytic Application in the Epoxidation of Allyl Chloride","authors":"Lingling Zou, Meihua Zhu, Xinpeng Li, Yin Yang, Qi Zhou, Wenjun Yuan, Na Hu, Xiangshu Chen, Hidetoshi Kita","doi":"10.1021/acs.langmuir.5c00035","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00035","url":null,"abstract":"Construction of hierarchical pore structure in supported titanium silicalites was an effective strategy to enhance catalytic performance and avoid the separation process in industrial applications. Herein, the hierarchical TS-2 zeolites were successfully prepared on the TiO<sub>2</sub>-modified α-Al<sub>2</sub>O<sub>3</sub> pellets by “bottom-up” method, which had good and stable catalytic performance for the allyl chloride epoxidation. TritonX-100 could construct a mesopore structure, restrain nucleation, and affect titanium coordination of the zeolites, which was beneficial for preparing large size, much hexa-coordination titanium content, and hierarchically supported TS-2 zeolites in this work. Besides, the TiO<sub>2</sub>-modified layer greatly increased the density and surface reactivity of hydroxyl groups on the α-Al<sub>2</sub>O<sub>3</sub> pellet, which were well-situated to prepare homogeneous and anatase-free hierarchical TS-2 zeolite layers. The hierarchically supported TS-2 zeolites were applied to the epoxidation of allyl chloride with hydrogen peroxide, and allyl chloride conversion and epichlorohydrin selectivity were up to 99.13% and 96.53%, respectively.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"7 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496075","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}
NaNi1/3Fe1/3Mn1/3O2 (NFM111) is widely used because of its high theoretical specific capacity and excellent environmental adaptability. In our previous study, NFM111 was synthesized by solid-phase ball milling and comprehensively evaluated. It was found that NFM111 has NiO in the bulk phase, which may lead to the instability of the structure and affect the properties of the material. To solve this problem, we prepared spherical NFM111 by coprecipitation and prilling in this work. The spherical morphology of NFM111 is obtained, and the content of NiO peaks is reduced. At the same time, the tap density of the particles and the rate performance of the material are effectively improved. In this work, the advantages and disadvantages of two methods for preparing spherical NFM111 materials are analyzed by comparing their properties. It provides some reference for the subsequent production research of spherical NFM111.
{"title":"Regulated Synthesis of Sodium-Ion Cathode Materials: Two High-Performance Spherical Layered Metal Oxides","authors":"Xiangnan Li, Mengdan Zhang, Xinyu Tang, Xiaojian Liu, Ziya Zhang, Hongyu Dong, Huishuang Zhang, Yanhong Yin, Shu-Ting Yang","doi":"10.1021/acs.langmuir.5c00433","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00433","url":null,"abstract":"NaNi<sub>1/3</sub>Fe<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> (NFM111) is widely used because of its high theoretical specific capacity and excellent environmental adaptability. In our previous study, NFM111 was synthesized by solid-phase ball milling and comprehensively evaluated. It was found that NFM111 has NiO in the bulk phase, which may lead to the instability of the structure and affect the properties of the material. To solve this problem, we prepared spherical NFM111 by coprecipitation and prilling in this work. The spherical morphology of NFM111 is obtained, and the content of NiO peaks is reduced. At the same time, the tap density of the particles and the rate performance of the material are effectively improved. In this work, the advantages and disadvantages of two methods for preparing spherical NFM111 materials are analyzed by comparing their properties. It provides some reference for the subsequent production research of spherical NFM111.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"35 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496077","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 : 2025-02-24DOI: 10.1021/acs.langmuir.4c04932
Xuesong Peng, Xu Zhou, Jie Jiang, Yaqiang Li, Guangzhao Wang, Ruopeng Li, Fuxue Wang, Xiubin Luo, Maozhong An
The roughening layer on the electrolytic copper foil is crucial to the performance of printed circuit boards (PCBs). Additives provide a straightforward and efficient method for improving the performance of the copper foil roughening layer. This study introduces N,N-dimethyl-dithiocarbamate propanesulfonate (DPS) for the first time as an electrochemical roughening additive for copper foils. The effect of DPS concentration on roughening morphology and copper deposition was investigated using techniques such as scanning electron microscopy (SEM), atomic force microscopy (AFM), cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). In addition, density functional theory (DFT) calculations, in situ Raman spectroscopy, and electrochemical quartz crystal microbalance (EQCM) were employed to examine the adsorption interactions between DPS, the copper substrate, and copper ions. At a concentration of 20 mg/L, the copper foil roughening layer exhibited significant improvement in morphology, resulting in the successful preparation of a high-volume low-profile (HVLP) copper foil. The roughening layer achieved an RZ value as low as 1.09 μm and a peel strength of 1.02 N/mm.
{"title":"Theoretical Research and Application of Additive DPS in the Electrochemical Microroughening Layer of Copper Foil","authors":"Xuesong Peng, Xu Zhou, Jie Jiang, Yaqiang Li, Guangzhao Wang, Ruopeng Li, Fuxue Wang, Xiubin Luo, Maozhong An","doi":"10.1021/acs.langmuir.4c04932","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c04932","url":null,"abstract":"The roughening layer on the electrolytic copper foil is crucial to the performance of printed circuit boards (PCBs). Additives provide a straightforward and efficient method for improving the performance of the copper foil roughening layer. This study introduces <i>N</i>,<i>N</i>-dimethyl-dithiocarbamate propanesulfonate (DPS) for the first time as an electrochemical roughening additive for copper foils. The effect of DPS concentration on roughening morphology and copper deposition was investigated using techniques such as scanning electron microscopy (SEM), atomic force microscopy (AFM), cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). In addition, density functional theory (DFT) calculations, in situ Raman spectroscopy, and electrochemical quartz crystal microbalance (EQCM) were employed to examine the adsorption interactions between DPS, the copper substrate, and copper ions. At a concentration of 20 mg/L, the copper foil roughening layer exhibited significant improvement in morphology, resulting in the successful preparation of a high-volume low-profile (HVLP) copper foil. The roughening layer achieved an <i>R</i><sub>Z</sub> value as low as 1.09 μm and a peel strength of 1.02 N/mm.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"65 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143486377","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 : 2025-02-24DOI: 10.1021/acs.langmuir.4c04686
Huanqin Zhao, Jiachen Sun, Xin Yang, Yongzhen Ma, Yang Xiang, Xue Yu, Wentian Yang, Junyi Liu, Changqin Jin, Yan Cheng
Elaborate engineering of the microstructure of electromagnetic (EM) absorption materials affords infinite potential for achieving superior EM wave absorption performance. In this work, a leaf-like Co/C nanosheet was rationally fabricated by a facile pyrolysis of a CoZn-based zeolitic imidazolate framework-L (Co/Zn-ZIF-L) precursor. Herein, Co nanoparticles (NPs) are uniformly confined in the leaf-like porous carbon matrix, forming attractive heterostructures. A suitable 2D morphology and Co/C binary components endow the composite with superior impedance matching and synergetic EM losses for excellent microwave absorption and radar stealth performance. When the filler content is as low as 25 wt %, the strong absorption intensity of −47.6 dB is reached at a thickness of 2.1 mm, and a broad effective bandwidth of 4.9 GHz is achieved at a thickness of only 1.6 mm. At the detection theta of 0°, the maximum radar cross-sectional (RCS) reduction value reaches 17.9 dB·m2. Hence, it is expected that the leaf-like Co/C nanosheet exhibits significant advantages in the field of EM wave absorption and radar stealth, which paves the way for future exploration of high-performance EM wave absorption materials.
{"title":"Synthesis of a Leaf-Like Co/C Nanosheet for Efficient Microwave Absorption","authors":"Huanqin Zhao, Jiachen Sun, Xin Yang, Yongzhen Ma, Yang Xiang, Xue Yu, Wentian Yang, Junyi Liu, Changqin Jin, Yan Cheng","doi":"10.1021/acs.langmuir.4c04686","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c04686","url":null,"abstract":"Elaborate engineering of the microstructure of electromagnetic (EM) absorption materials affords infinite potential for achieving superior EM wave absorption performance. In this work, a leaf-like Co/C nanosheet was rationally fabricated by a facile pyrolysis of a CoZn-based zeolitic imidazolate framework-L (Co/Zn-ZIF-L) precursor. Herein, Co nanoparticles (NPs) are uniformly confined in the leaf-like porous carbon matrix, forming attractive heterostructures. A suitable 2D morphology and Co/C binary components endow the composite with superior impedance matching and synergetic EM losses for excellent microwave absorption and radar stealth performance. When the filler content is as low as 25 wt %, the strong absorption intensity of −47.6 dB is reached at a thickness of 2.1 mm, and a broad effective bandwidth of 4.9 GHz is achieved at a thickness of only 1.6 mm. At the detection theta of 0°, the maximum radar cross-sectional (RCS) reduction value reaches 17.9 dB·m<sup>2</sup>. Hence, it is expected that the leaf-like Co/C nanosheet exhibits significant advantages in the field of EM wave absorption and radar stealth, which paves the way for future exploration of high-performance EM wave absorption materials.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"12 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143477641","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 : 2025-02-24DOI: 10.1021/acs.langmuir.4c04261
Jennifer M. Pollock, Connor H. Yew, Anubhav Tripathi
The presence of amyloid-beta (1–42) in CSF and plasma has been implicated as a pathological hallmark of Alzheimer’s disease. Here, we demonstrate a high-sensitivity method of detection and quantification for total Aβ42 utilizing two-antibody functionalized microparticles interfaces. Our method of biomarker detection utilizes two types of microbeads: (1) magnetic particles functionalized with monoclonal antibodies and (2) polystyrene particles dual functionalized with monoclonal antibodies and a unique DNA “tag”. The bead complex that forms in the presence of the target analyte is detected using qPCR to determine the analyte concentration. To demonstrate our method, we tested for the presence of amyloid-beta (1–42) in Tris buffer. The established limit of detection for this assay is 0.05 pg mL–1 (12.5 femtomolar) in purified samples This study provides an improved method of protein detection that could be used for the early diagnosis of Alzheimer’s disease.
{"title":"Utilizing Functionalized Dual-Microbead Interfaces for Measurements of Amyloid-beta (1–42) with Femtomolar Sensitivity","authors":"Jennifer M. Pollock, Connor H. Yew, Anubhav Tripathi","doi":"10.1021/acs.langmuir.4c04261","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c04261","url":null,"abstract":"The presence of amyloid-beta (1–42) in CSF and plasma has been implicated as a pathological hallmark of Alzheimer’s disease. Here, we demonstrate a high-sensitivity method of detection and quantification for total Aβ42 utilizing two-antibody functionalized microparticles interfaces. Our method of biomarker detection utilizes two types of microbeads: (1) magnetic particles functionalized with monoclonal antibodies and (2) polystyrene particles dual functionalized with monoclonal antibodies and a unique DNA “tag”. The bead complex that forms in the presence of the target analyte is detected using qPCR to determine the analyte concentration. To demonstrate our method, we tested for the presence of amyloid-beta (1–42) in Tris buffer. The established limit of detection for this assay is 0.05 pg mL<sup>–1</sup> (12.5 femtomolar) in purified samples This study provides an improved method of protein detection that could be used for the early diagnosis of Alzheimer’s disease.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"65 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143486280","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 : 2025-02-24DOI: 10.1021/acs.langmuir.4c03286
Hermania Em Wogo, Nadiatus Silmi, Didi Prasetyo Benu, Fry Voni Steky, Kevin Manuel Setiawan, Sudirman, Muhammad Wildan Azzindani, Rino Rakhmata Mukti, Veinardi Suendo
We report the synthesis of Al-incorporated bicontinuous concentric lamellar (bcl) silica particles with mesoporous-scale pores, high pore volume, and high surface area through the reflux method at atmospheric pressure. This study demonstrates that bcl morphology can be achieved by carefully tuning reaction parameters such as reflux time, temperature, and surfactant type. The aluminum (Al) precursor concentration significantly influences the formation of Al-incorporated bcl silica, while the NaOH concentration has no significant impact. Scanning electron microscope (SEM) images show that synthesis at 130 °C for 20 h using the CTAB (cetyltrimethylammonium bromide) surfactant and 1 mol sodium aluminate produced a spherical silica bcl-like morphology surrounded by lamellae. These SEM images are supported by the N2 physisorption isotherm pattern, which follows type IVa with an H3 hysteresis loop, indicating slit-like particle aggregates. Exceeding 3 mol of aluminum prevents bcl morphology formation, with the hysteresis pattern shifting to type H2, indicative of pore blocking. This study provides a reference for the development of Al-incorporated bcl silica into zeolite with bcl morphology.
{"title":"Investigating the Correlation of Morphology with the N2 Physisorption Behavior of Al-Incorporated bcl Silica","authors":"Hermania Em Wogo, Nadiatus Silmi, Didi Prasetyo Benu, Fry Voni Steky, Kevin Manuel Setiawan, Sudirman, Muhammad Wildan Azzindani, Rino Rakhmata Mukti, Veinardi Suendo","doi":"10.1021/acs.langmuir.4c03286","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c03286","url":null,"abstract":"We report the synthesis of Al-incorporated bicontinuous concentric lamellar <i>(bcl)</i> silica particles with mesoporous-scale pores, high pore volume, and high surface area through the reflux method at atmospheric pressure. This study demonstrates that <i>bcl</i> morphology can be achieved by carefully tuning reaction parameters such as reflux time, temperature, and surfactant type. The aluminum (Al) precursor concentration significantly influences the formation of Al-incorporated <i>bcl</i> silica, while the NaOH concentration has no significant impact. Scanning electron microscope (SEM) images show that synthesis at 130 °C for 20 h using the CTAB (cetyltrimethylammonium bromide) surfactant and 1 mol sodium aluminate produced a spherical silica <i>bcl</i>-like morphology surrounded by lamellae. These SEM images are supported by the N<sub>2</sub> physisorption isotherm pattern, which follows type IVa with an H3 hysteresis loop, indicating slit-like particle aggregates. Exceeding 3 mol of aluminum prevents <i>bcl</i> morphology formation, with the hysteresis pattern shifting to type H2, indicative of pore blocking. This study provides a reference for the development of Al-incorporated <i>bcl</i> silica into zeolite with <i>bcl</i> morphology.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"27 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143486279","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}
Microlubrication technology significantly improves lubrication performance and heat dissipation during metal cutting by spraying atomized oil droplets around the surface of the workpiece to form a uniform lubrication film. Therefore, it is of great significance to thoroughly investigate the effects of the viscosity characteristics of oil droplets and the inclination angle of the wall on the dynamic behavior of oil droplets impacting on the inclined wall. The dynamic process of viscous oil droplets impacting the inclined wetted wall was observed and analyzed through high-speed camera experiments, with the aim of investigating the effects of droplet viscosity, impact velocity, and wall inclination on the morphological characteristics and distribution pattern of the oil droplets. The results show that the morphological characteristics of oil droplets are affected by the coupling of droplet viscosity, wall inclination, impact velocity, etc. and that deposition spreading, jet slipping, and jet fracture will occur. The increased viscosity inhibits the generation of jet fracture phenomena, causing the critical angle at which jet fracture occurs to increase, leading to a shift in the critical kinematic morphology critical point. Increasing the Weber number and the inclination of the wall will be more favorable for the occurrence of the jet fracture phenomenon. The ratio of deposition spreading at low inclination increases with an increasing viscosity of oil droplets in a certain range, and the spreading characteristics of oil droplets with different viscosities are more significantly affected by the angle of the wall. The fracture time of the jet decreases with the increase of impact velocity, and the volume of the droplet increases with the increase of wall inclination.
{"title":"Dynamics Characteristics of Viscous Oil Droplets Impacting on Inclined Wetted Walls","authors":"Miaomiao Chen, Zhaochang Wang, Nan Zheng, Guotao Zhang, Xiaolei Hu, Baohong Tong","doi":"10.1021/acs.langmuir.5c00015","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00015","url":null,"abstract":"Microlubrication technology significantly improves lubrication performance and heat dissipation during metal cutting by spraying atomized oil droplets around the surface of the workpiece to form a uniform lubrication film. Therefore, it is of great significance to thoroughly investigate the effects of the viscosity characteristics of oil droplets and the inclination angle of the wall on the dynamic behavior of oil droplets impacting on the inclined wall. The dynamic process of viscous oil droplets impacting the inclined wetted wall was observed and analyzed through high-speed camera experiments, with the aim of investigating the effects of droplet viscosity, impact velocity, and wall inclination on the morphological characteristics and distribution pattern of the oil droplets. The results show that the morphological characteristics of oil droplets are affected by the coupling of droplet viscosity, wall inclination, impact velocity, etc. and that deposition spreading, jet slipping, and jet fracture will occur. The increased viscosity inhibits the generation of jet fracture phenomena, causing the critical angle at which jet fracture occurs to increase, leading to a shift in the critical kinematic morphology critical point. Increasing the Weber number and the inclination of the wall will be more favorable for the occurrence of the jet fracture phenomenon. The ratio of deposition spreading at low inclination increases with an increasing viscosity of oil droplets in a certain range, and the spreading characteristics of oil droplets with different viscosities are more significantly affected by the angle of the wall. The fracture time of the jet decreases with the increase of impact velocity, and the volume of the droplet increases with the increase of wall inclination.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"68 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143486281","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 current traditional treatment for bacterial infections is to treat them with antibiotics, and the misuse of antibiotics can lead to an increase in bacterial resistance. In contrast, the development of new antibiotics is much slower than the speed of adaptation of drug-resistant bacteria, making it necessary to develop a drug that does not rely on antibiotics. Therefore, based on the advantages of photothermal therapy, NIR II-responsive gold hollow nanorods (GHNRs) were developed to overcome the limitation of bacterial drug resistance in conventional bacterial therapy. GHNRs can quickly respond to a 980 nm laser with a high photothermal conversion efficiency of 41.78%. The high temperature produced by GHNRs can effectively kill Staphylococcus aureus and Escherichia coli, providing a new strategy for the clinical treatment of bacterial infectious diseases without antibiotic dependence.
{"title":"Photothermal Antibacterial Therapy of Near-Infrared II Region Laser Mediated by Gold Hollow Nanorod","authors":"Yan Wang, Shuai Pan, Wenqiong Zhang, Jinfeng Cai, Weijing Han, Zhaoqin Zhu","doi":"10.1021/acs.langmuir.4c05164","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05164","url":null,"abstract":"The current traditional treatment for bacterial infections is to treat them with antibiotics, and the misuse of antibiotics can lead to an increase in bacterial resistance. In contrast, the development of new antibiotics is much slower than the speed of adaptation of drug-resistant bacteria, making it necessary to develop a drug that does not rely on antibiotics. Therefore, based on the advantages of photothermal therapy, NIR II-responsive gold hollow nanorods (GHNRs) were developed to overcome the limitation of bacterial drug resistance in conventional bacterial therapy. GHNRs can quickly respond to a 980 nm laser with a high photothermal conversion efficiency of 41.78%. The high temperature produced by GHNRs can effectively kill <i>Staphylococcus aureus</i> and <i>Escherichia coli</i>, providing a new strategy for the clinical treatment of bacterial infectious diseases without antibiotic dependence.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"230 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143486382","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}
When functional microgels are synthesized via radical copolymerization, spatial gradients of functional groups often form due to a difference in reactivity ratios between monomer and comonomer. In this study, we systematically investigated the effect of a decreasing gradient of charged groups from the core to the shell of microgels on their surface properties, which are crucial for colloidal particles, through the analysis of interfacial electrokinetic phenomena using Ohshima’s equation. A series of electrophoretic analyses combined with dynamic light scattering revealed that the surface of the microgels undergoes a multistep collapse during the particle-size reduction due to dehydration upon increasing the temperature. Furthermore, the more complicated hierarchical gradient of charged groups within the microgels was elucidated by quantitatively evaluating changes in surface properties during precipitation polymerization based on interfacial electrokinetic phenomena.
{"title":"Interfacial Electrokinetic Phenomena of Thermoresponsive Microgels with a Spatial Gradient of Charged Groups","authors":"Yuichiro Nishizawa, Yuji Sato, Ryuji Namioka, Daisuke Suzuki","doi":"10.1021/acs.langmuir.5c00047","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00047","url":null,"abstract":"When functional microgels are synthesized via radical copolymerization, spatial gradients of functional groups often form due to a difference in reactivity ratios between monomer and comonomer. In this study, we systematically investigated the effect of a decreasing gradient of charged groups from the core to the shell of microgels on their surface properties, which are crucial for colloidal particles, through the analysis of interfacial electrokinetic phenomena using Ohshima’s equation. A series of electrophoretic analyses combined with dynamic light scattering revealed that the surface of the microgels undergoes a multistep collapse during the particle-size reduction due to dehydration upon increasing the temperature. Furthermore, the more complicated hierarchical gradient of charged groups within the microgels was elucidated by quantitatively evaluating changes in surface properties during precipitation polymerization based on interfacial electrokinetic phenomena.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"30 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143477642","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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