Langmuir最新文献

{"title":"Encapsulation of Monoterpene Phenols in Protein-Stabilized Nanoemulsions for Improved Wound Healing","authors":"Mengran Wang,&nbsp;Xue Ma,&nbsp;Xinxin Han,&nbsp;Zhiliang Gao,&nbsp;Muthupandian Ashokkumar,&nbsp;Jiwei Cui,&nbsp;Jingcheng Hao,&nbsp;Peiyu Zhang* and Qun Yu*,&nbsp;","doi":"10.1021/acs.langmuir.5c0002510.1021/acs.langmuir.5c00025","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00025https://doi.org/10.1021/acs.langmuir.5c00025","url":null,"abstract":"<p >Monoterpene phenols have antibacterial, antioxidant, anticancer, antihypertensive, and antidiabetic properties, but their natural volatility and hydrophobicity limit their biomedical applications. In this work, we developed an oil-in-water nanoemulsion (NE) stabilized by proteins (i.e., sodium caseinate, NaCas) and polyphenols (i.e., tannic acid, TA) using phacoemulsification, where thymol (TH) was dissolved in carvacrol (CA) and the mixture was used as the dispersed phase. The NE avoids the use of traditional surfactants as the stabilizer. Amphiphilic NaCas could stabilize the NE, followed by further cross-linking of NaCas using TA. These antimicrobial agents of monoterpene phenols were efficiently encapsulated in NE to enhance their colloidal stability in aqueous solution. The resulting NE showed strong antibacterial activity, reduced inflammation ability, and improved healing of bacteria-infected wounds. TA acted as both an NE stabilizer and a synergistic agent to boost antibacterial effects and accelerate wound repair. This work demonstrates a promising strategy for delivering natural antimicrobial agents of monoterpene phenols to treat infected wounds.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 12","pages":"8243–8251 8243–8251"},"PeriodicalIF":3.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737527","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}

{"title":"Green Catalysis: Water as a Sustainable Medium in Organocatalyzed Reactions","authors":"Anfal Fatima, Anam Shahzadi, Adnan Majeed, Sawsan S. Al-Rawi, Ahmad H. Ibrahim, Muhammad Adnan Iqbal, Faisal Qaleel","doi":"10.1021/acs.langmuir.4c05355","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05355","url":null,"abstract":"The use of organocatalysts has increased significantly in recent years due to their tremendous applications in green solvents. Thus, using water as a solvent has evolved as a critical factor. Organocatalysts are efficient and sustainable agents for promoting chemical reactions in water. The literature has been extensively reviewed, and the use of various organocatalysts for three fundamental C–C bond-forming processes─the Aldol, Michael, and Mannich reactions in aqueous media─have been compiled in this study. Organocatalysts can overcome the limitations of conventional organic solvents by achieving high reaction rates and regioselectivity in water. This Review highlights the advantages of organocatalysts in aqueous media for these key reactions. It discusses the principles behind designing effective organocatalysts, focusing on their impact on selectivity, sustainability, and reaction efficiency. This study also summarizes the most significant advancements in sustainable organic reactions over the past decade.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"56 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672601","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}

{"title":"Progress of 3D Graphene-Based Electrocatalytic Oxygen Evolution Reaction Catalysts","authors":"Tong Liu,&nbsp;Junhua You*,&nbsp;Yao Zhao,&nbsp;Jie Zhang and Jian Wang*,&nbsp;","doi":"10.1021/acs.langmuir.4c0519510.1021/acs.langmuir.4c05195","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05195https://doi.org/10.1021/acs.langmuir.4c05195","url":null,"abstract":"<p >Electrocatalytic water splitting is a clean and feasible method for hydrogen production, expected to become a key technology for meeting clean energy demands. Transition metal-based nanoparticles, including single-atom catalysts and their compounds, are widely used in electrocatalytic water splitting, but they often suffer from issues like easy agglomeration and poor conductivity. The integration of these nanoparticles with three-dimensional (3D) graphene enhances conductivity and prevents agglomeration, while improving the adsorption and desorption rates of reactants and intermediates on the catalyst surface during electrocatalytic water splitting, thereby boosting energy efficiency. This paper reviews the preparation methods of graphene-based supported electrocatalysts and their applications in oxygen evolution reactions (OERs), further discussing the mechanism by which 3D graphene improves OER performance.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 12","pages":"7965–7979 7965–7979"},"PeriodicalIF":3.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737510","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}

{"title":"Dye Extraction by Functionalized Magnetic Nanoparticles with Surfactants and Cyclodextrins through Specific and Host–Guest Interactions","authors":"Manoj Kumar Goshisht, Rajpreet Kaur, Mandeep Singh Bakshi","doi":"10.1021/acs.langmuir.4c05340","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05340","url":null,"abstract":"Functionalized magnetic nanoparticles (NPs) were synthesized by using different surfactants and cyclodextrins (CDs) for the extraction of toxic dyes from the aqueous bulk at room temperature to exploit the surfactant/CD–dye interactions operating at the solid–liquid interface. The extraction of dyes was monitored by UV–visible studies and quantitatively estimated. Both hexamethylene bis(hexadecyl dimethylammonium bromide) (16–6–16) and tris(2-(N-dodecyl <i>N</i>,<i>N</i>-dimethylammonio)ethylamine) tribromide (TriCAT) functionalized magnetic NPs proved to be excellent extractors, whereas extraction was highly facilitated at high or low pH when CD-functionalized magnetic NPs were used. Self-association among the dye molecules impeded the extraction. A combination of both polar as well as nonpolar along with dye–dye interactions participated in the extraction. Quantification was carried out by performing surface analysis of dye-loaded magnetic NPs. FTIR and XPS identified the functionalities participating in the extraction, whereas TEM, FESEM, and their EDS analyses determined the elemental composition. The amounts of N and S acted as fingerprinting elements for the adsorption of dyes at the solid–liquid interface, whereas overall amounts of C and O qualitatively differentiated among the relative amounts of dyes extracted. All results concluded that the extraction was much facilitated for those dyes which demonstrated a low degree of self-association in aqueous bulk and a high degree of solid–liquid interfacial adsorption.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"24 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672600","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}

{"title":"Dye Extraction by Functionalized Magnetic Nanoparticles with Surfactants and Cyclodextrins through Specific and Host–Guest Interactions","authors":"Manoj Kumar Goshisht,&nbsp;Rajpreet Kaur* and Mandeep Singh Bakshi*,&nbsp;","doi":"10.1021/acs.langmuir.4c0534010.1021/acs.langmuir.4c05340","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05340https://doi.org/10.1021/acs.langmuir.4c05340","url":null,"abstract":"<p >Functionalized magnetic nanoparticles (NPs) were synthesized by using different surfactants and cyclodextrins (CDs) for the extraction of toxic dyes from the aqueous bulk at room temperature to exploit the surfactant/CD–dye interactions operating at the solid–liquid interface. The extraction of dyes was monitored by UV–visible studies and quantitatively estimated. Both hexamethylene bis(hexadecyl dimethylammonium bromide) (16–6–16) and tris(2-(N-dodecyl <i>N</i>,<i>N</i>-dimethylammonio)ethylamine) tribromide (TriCAT) functionalized magnetic NPs proved to be excellent extractors, whereas extraction was highly facilitated at high or low pH when CD-functionalized magnetic NPs were used. Self-association among the dye molecules impeded the extraction. A combination of both polar as well as nonpolar along with dye–dye interactions participated in the extraction. Quantification was carried out by performing surface analysis of dye-loaded magnetic NPs. FTIR and XPS identified the functionalities participating in the extraction, whereas TEM, FESEM, and their EDS analyses determined the elemental composition. The amounts of N and S acted as fingerprinting elements for the adsorption of dyes at the solid–liquid interface, whereas overall amounts of C and O qualitatively differentiated among the relative amounts of dyes extracted. All results concluded that the extraction was much facilitated for those dyes which demonstrated a low degree of self-association in aqueous bulk and a high degree of solid–liquid interfacial adsorption.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 12","pages":"8214–8227 8214–8227"},"PeriodicalIF":3.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.langmuir.4c05340","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Progress of 3D Graphene-Based Electrocatalytic Oxygen Evolution Reaction Catalysts","authors":"Tong Liu, Junhua You, Yao Zhao, Jie Zhang, Jian Wang","doi":"10.1021/acs.langmuir.4c05195","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05195","url":null,"abstract":"Electrocatalytic water splitting is a clean and feasible method for hydrogen production, expected to become a key technology for meeting clean energy demands. Transition metal-based nanoparticles, including single-atom catalysts and their compounds, are widely used in electrocatalytic water splitting, but they often suffer from issues like easy agglomeration and poor conductivity. The integration of these nanoparticles with three-dimensional (3D) graphene enhances conductivity and prevents agglomeration, while improving the adsorption and desorption rates of reactants and intermediates on the catalyst surface during electrocatalytic water splitting, thereby boosting energy efficiency. This paper reviews the preparation methods of graphene-based supported electrocatalysts and their applications in oxygen evolution reactions (OERs), further discussing the mechanism by which 3D graphene improves OER performance.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"95 4 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672599","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}

{"title":"Effective Structural Color Generation by Highly Ordered and Stacked Nanoparticle Layers of Titanium Dioxide Modified with Long-Chain Carboxylic Acids","authors":"Yui Yamagishi, Shoma Sakamoto, Ayane Yamazaki, Arisa Watanabe, Katsuyuki Sasaki, Hisayoshi Kobayashi, Kiminori Hirai, Atsuhiro Fujimori","doi":"10.1021/acs.langmuir.5c00503","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00503","url":null,"abstract":"The aim was to easily achieve clearer structural colors than ever before by layering nanoparticles by using the Langmuir-Blodgett method. The outermost surface of titanium dioxide (TiO₂) particles with a particle diameter of 15 nm was modified with long-chain fatty acids to synthesize organo-modified TiO₂. The organo-modified TiO₂ was spread on the air/water interface, and the obtained single-particle layer was laminated with different numbers of layers to obtain stepped multiparticle layers with thicknesses of 400–800 nm. The obtained multiparticle layer exhibited a clear structural color gradation. Compared with previous studies involving the use of triiron tetroxide and nanodiamonds with a particle diameter of 5 nm, TiO₂ exhibited a clear structural color without the need for pretreatment. The organo-modified TiO₂ multiparticle layer formed a highly ordered layer structure demonstrating 11th-order reflection in out-of-plane X-ray diffraction. Additionally, compared to other systems, the modification rate was high and the in-plane packing of the modified chains was highly advanced. However, the hue changed when the samples were annealed at 50 °C for 50 h. A method was subsequently proposed to introduce hydrogen-bonding functional groups into the modified chains to suppress this behavior. The pursuit of ease and stability in the expression of structural colors using nanoparticles will lead to future applications in cosmetic science.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"8 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666443","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}

{"title":"Conductive Carbon Fibrous Interlayer Embedded with MoS2@CNT Composites for Mitigating Polysulfide Shuttling by Absorption and Catalysis in Lithium–Sulfur Batteries","authors":"Shuang Yuan,&nbsp;Ling Lin,&nbsp;Huahui Chen,&nbsp;Tao Zhu,&nbsp;Peng Xu,&nbsp;Qi Sun,&nbsp;Long Li* and Jiao-Jing Shao*,&nbsp;","doi":"10.1021/acs.langmuir.5c0011010.1021/acs.langmuir.5c00110","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00110https://doi.org/10.1021/acs.langmuir.5c00110","url":null,"abstract":"<p >Lithium–sulfur batteries (LSBs) have emerged as promising energy storage systems due to their high energy density, low cost, and environmental friendliness. However, the “shuttle effect” of lithium polysulfides (LiPSs) leads to rapid capacity decay and poor cycle stability in LSBs, hindering further development and application of LSBs. In addition, it is difficult for existing strategies to provide effective adsorption and catalytic properties for polysulfides while simultaneously ensuring rapid ion transport. To address this issue, a composite film made of carbon fibers embedded with MoS₂@CNT is proposed as an interlayer between the separator and the cathode. Results show that such a conductive interlayer can effectively capture LiPSs and catalyze their transformation. The as-assembled LSBs deliver an initial discharge-specific capacity of 1179.03 mAh/g at 0.5 C, and a capacity of 1086.33 mAh/g remains after 100 cycles. During long-term cycling tests, the LSBs show discharge capacities of 463.13 mAh/g with a decay rate per cycle of 0.07% after 500 cycles at 3 C, representing a reduction of 0.06% compared to that of commercial batteries (0.13%). This work demonstrates the potential of the independent conductive interlayer design of carbon fibrous films embedded with MoS₂@CNT composites for enhancing battery performance. The film can not only provide an efficient conductive network for accelerating ion transport but also suppress the shuttle effect and catalyze the transformation of LiPSs, boosting electrochemical reaction kinetics.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 12","pages":"8290–8300 8290–8300"},"PeriodicalIF":3.7,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737665","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}

{"title":"Synthesis of New Cationic Dicephalic Surfactants and Their Nonequivalent Adsorption at the Air/Solution Interface","authors":"Łukasz Lamch, Izabella Leszczyńska, Daria Długowska, Weronika Szczęsna - Górniak, Piotr Batys, Ewelina Jarek, Kazimiera A. Wilk, Piotr Warszyński","doi":"10.1021/acs.langmuir.4c04803","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c04803","url":null,"abstract":"The interfacial behavior of aqueous solutions of newly synthesized 2-alkyl-<i>N</i>,<i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′,<i>N</i>′-hexamethylpropan-1,3-ammonium dibromides with decyl, dodecyl, and tetradecyl alkyl chains was investigated both experimentally and theoretically. The results of the surface tension measurements were described using the modified surface quasi-two-dimensional electrolyte (mSTDE) model of ionic surfactant adsorption, which was supported by molecular dynamics simulations. Our contribution encompasses the design, synthesis, and characterization of a novel class of dicephalic-type cationic surfactants, branched on a methine motif, possessing two symmetric trimethylammonium groups, which constitute a double-head extension of the standard alkyltrimethylammonium salts of the single-head, single-tail structure. The convenient synthetic route and final purification steps allowed for the high-yield, high-purity production of the surfactants. Dicephalic-type surfactants demonstrated lower surface activity and higher critical micelle concentration values when compared with their single head–single tail counterparts. That can be attributed primarily to the presence of strong electrostatic repulsive forces within the bulky, double-charge headgroups and significant counterion condensation. Furthermore, molecular dynamics simulations demonstrated a propensity for the desorption of surfactants from the interface, even in diluted solutions, which constrained the attainable surface concentration and resulted in a lower reduction in surface tension. The mSTDE model of adsorption provided an excellent description of the experimental surface isotherms with a concise set of parameters. The model’s predictive power was demonstrated by the studies of the effect of inorganic salts on the surface activity of investigated surfactants. Our unique approach enabled us to gain a theoretical explanation of the newly devised surfactants’ behavior at the water/air interface.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"22 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666474","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}

{"title":"Tumor-Targeting Theranostic Polymers","authors":"Ying Wei,&nbsp; and ,&nbsp;Mingfeng Wang*,&nbsp;","doi":"10.1021/acs.langmuir.4c0497810.1021/acs.langmuir.4c04978","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c04978https://doi.org/10.1021/acs.langmuir.4c04978","url":null,"abstract":"<p >Theranostic polymers have emerged as a versatile platform in cancer nanomedicine, integrating therapeutic and imaging functionalities to overcome challenges in oncology. Featuring diverse architectures such as linear polymers, dendrimers, star-like polymers, and bottle-brush polymers, these systems enable tumor-targeted drug delivery, real-time imaging, and controlled release. Recent advances in stimuli-responsive designs and biomimetic strategies have improved their specificity, stability, and adaptability, outperforming conventional nanocarriers. This review summarizes the design, synthesis, and biomedical applications of theranostic polymers, focusing on their potential to address tumor heterogeneity and biological barriers. The challenges of biocompatibility, immunogenicity, and clinical translation are discussed, with a perspective toward future developments in precision medicine and imaging-guided cancer therapy.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 12","pages":"7928–7945 7928–7945"},"PeriodicalIF":3.7,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737436","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}