Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

{"title":"Engineering wettability-controlled copper surfaces to mitigate airborne bacterial contamination in hospitals","authors":"Alexandre M. Emelyanenko ,&nbsp;Fadi Sh. Omran ,&nbsp;Marina Yu. Chernukha ,&nbsp;Lusine R. Avetisyan ,&nbsp;Eugenia G. Tselikina ,&nbsp;Gleb A. Putsman ,&nbsp;Sergey K. Zyryanov ,&nbsp;Kirill A. Emelyanenko ,&nbsp;Andrey V. Buglak ,&nbsp;Ludmila B. Boinovich","doi":"10.1016/j.colsurfa.2025.137085","DOIUrl":"10.1016/j.colsurfa.2025.137085","url":null,"abstract":"<div><div>Hospital-acquired infections remain a critical challenge in healthcare, with pathogens often proliferating via contaminated surfaces and aerosol transmission through ventilation systems. While copper-based materials are recognized for their intrinsic antimicrobial properties, their real-world efficacy in clinical settings – where factors like surface contamination, exploitation wear, and sanitization protocols interact dynamically – remains underexplored. This study investigates the long-term antimicrobial performance of copper-coated ventilation grates with engineered wettability (ranging from superhydrophilic to superhydrophobic) in the intensive care unit over 325 days. By comparing these surfaces to steel counterparts, we evaluated microbial colonization dynamics under operational conditions, including aerosol-deposited contaminants and routine swab sampling. The analysis of surface wettability and roughness to assess the degradation of deposited coatings and its impact on antibacterial activity showed that for all grates significant alterations in the contact angles from these for the freshly fabricated grates were observed. For the initially superhydrophilic substrate, the contact angle approached 90°, while for the superhydrophobic coating, it deteriorated from 162° to 150°. Results revealed that with respect to various bacterial strains, superhydrophilic and superhydrophobic copper surfaces outperformed both the smoother sputtered copper and the steel, highlighting the efficiency of the extreme wettability surfaces in reducing microbial contamination in clinical settings. After 325 days of clinical exposure, the cumulative number of swabs contaminated with microorganisms from the steel grate was found to be 2.7, 2.3, and 1.4 times higher than the corresponding values for the superhydrophobic, superhydrophilic, and smooth copper grates, respectively. This work bridges the gap between laboratory studies and real-world application and offers a strategy to curb nosocomial infections without disrupting clinical workflows.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137085"},"PeriodicalIF":4.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892290","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":"Dual-functional antireflection and antimicrobial PA/Cu2+/PDA silica coating via interface charge assembly","authors":"Zongxuan Zhang ,&nbsp;Hui Zhang ,&nbsp;Yuanyuan Shao ,&nbsp;Haiping Zhang ,&nbsp;Yanfeng Luo ,&nbsp;Chunbao Xu ,&nbsp;Jesse Zhu","doi":"10.1016/j.colsurfa.2025.137077","DOIUrl":"10.1016/j.colsurfa.2025.137077","url":null,"abstract":"<div><div>SiO₂ antireflection coating holds great promise in the optimization of optical lenses. However, their inherent hydrophilic and porous properties cause their surface to be susceptible to contamination by microorganisms. Herein, a SiO₂ antireflection coating with an antimicrobial surface is designed and fabricated by interface assembling polydopamine (PDA), Cu²⁺ and phytic acid (PA) on the SiO₂ coating to obtain a sustained antibacterial property. The phenolic hydroxyl group in PDA provides a large number of active sites for the chelating of Cu²⁺, thus endowing the coating with antibacterial properties (GSP-Cu²⁺). Further coordination with PA controls the release rate of Cu²⁺ and prolongs the service life of the antimicrobial coating (GSPP). Under the optimal conditions, the GSPP_0.1 coating achieved an antibacterial efficacy exceeding 99.99 % (<em>E. coli</em> and <em>S. aureus</em> antimicrobial rate &gt; 99.9 % at 6 h). Compared to the GSP-Cu²⁺ coating (0 %), the GSPP_0.1 coating still maintains an antibacterial efficacy of more than 80 % against <em>E. coli</em> and <em>S. aureus</em> after 12 days’ immersion in water, while maintaining the light transmittance above 96 %. These results demonstrate a promising potential for the practical functional antireflection.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137077"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887334","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":"High SO2 resistance, ultra-low noble metal content, hydrophobic Pt/CeO2 composites for CO oxidation","authors":"Xiaoxuan Fan,&nbsp;Xinru Qi,&nbsp;Liang Li","doi":"10.1016/j.colsurfa.2025.137072","DOIUrl":"10.1016/j.colsurfa.2025.137072","url":null,"abstract":"<div><div>CO oxidation in the presence of water and sulfur dioxide remains a significant challenge nowadays. Traditional CO oxidation catalysts are easily deactivated under such conditions, primarily due to sulfate formation on the surface. Herein, a hydrophobic Pt/CeO₂ composite with ultra-low noble metal content was fabricated via in-situ modification using silane coupling agents. The resulting composites demonstrate 100 % CO conversion and exceptional stability, even at temperatures below 80 °C, surpassing many recently reported catalysts. FTIR analysis confirmed the successful modification and hydrophobicity of the composite surface, while X-ray photoelectron spectroscopy showed no detectable sulfur element species deposition after long-term durability tests, highlighting its strong SO₂ resistance. This low-cost, remarkable sulfur resistance and, excellent stability, offer a promising pathway for a wide range of potential applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137072"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887432","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":"Enhanced catalytic activity for toluene oxidation induced by acid-alkali synergistic treatment","authors":"Peng Wu ,&nbsp;Long Chen ,&nbsp;Yu Chen ,&nbsp;Yunjian Su ,&nbsp;Junhui He","doi":"10.1016/j.colsurfa.2025.137084","DOIUrl":"10.1016/j.colsurfa.2025.137084","url":null,"abstract":"<div><div>While the catalytic performance of catalysts can be improved by either acid or alkali treatment, it has not been reported hitherto that acid-alkali synergistic treatment is beneficial for enhancing catalytic activity. In this work, we synthesized a novel CoMn₂O₄-3M Aa-U400 catalyst by acetic acid and urea co-treatment. The CoMn₂O₄-3M Aa-U400 exhibits superior catalytic activity for toluene oxidation with a 90 % toluene conversion (<em>T</em>₉₀) at 229℃, 13°C lower than CoMn₂O₄-U400 obtained by alkali treatment, and 23°C lower than CoMn₂O₄-3M Aa obtained by acid treatment. Detailed characterizations indicate that acid-alkali synergistic treatment not only increases the specific surface area of the CoMn₂O₄, but also greatly increases the content of active lattice oxygen species, which is extremely conducive to improving the catalytic performance. Meanwhile, the acid-alkali synergistic treatment creates a high-index crystal surface (311) without altering the crystal structure, resulting in more active sites and greater surface energy. The previously unrevealed insight into the acid-alkali co-treatment would benefit future design of active catalysts.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137084"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892288","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":"Core-shell bimetallic alloyed Pd@Pt nanocubes for synergistic photothermal/chemodynamic infectious wound therapy","authors":"Heying Li ,&nbsp;Jingming Zhai ,&nbsp;Qingnan Zhang,&nbsp;Jinghua Li","doi":"10.1016/j.colsurfa.2025.137075","DOIUrl":"10.1016/j.colsurfa.2025.137075","url":null,"abstract":"<div><div>Infections resulting from bacteria resistant to antibiotics represent a significant risk to human health. Therefore, exploring novel and effective antibacterial treatment strategies as substitutes for traditional antibiotics is essential. Here, we developed heterogeneous bimetallic Pd@Pt Cubes with a core-shell structure for near-infrared light-enhanced bacterial infection treatment. Heterogeneous core-shell bimetallic Pd@Pt nanocubes demonstrated remarkable photothermal properties along with peroxidase-mimic activity, promoting the combined interaction between photothermal antibacterial therapy (PTT) and chemodynamic therapy (CDT). As demonstrated in vitro antibacterial tests, Pd@Pt Cubes can effectively eliminate both <em>E. coli</em> and <em>S. aureus</em>, and enhance drug penetration in biofilm by disrupting the biofilm. Furthermore, in vivo antibacterial tests indicated that Pd@Pt Cubes can significantly enhance the repair of tissues in bacterial infection sites. Overall, this study constructed an efficient and multifunctional antibacterial nanoplatform through a rational combination and design, and achieved PTT/CDT bimodal bacterial infection treatment through multiple enhancement strategies.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137075"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891794","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":"Insight into the enhanced electrocatalytic performance of double-layer Ti/Fe2O3/Ce-PbO2 anode for levofloxacin degradation","authors":"Zhonghua Mu ,&nbsp;Linlin Dong ,&nbsp;Wenzhi Zhang ,&nbsp;Wanxia Tang ,&nbsp;Guohua Dong ,&nbsp;Dongfeng Chai ,&nbsp;Xinjia Zhang","doi":"10.1016/j.colsurfa.2025.137078","DOIUrl":"10.1016/j.colsurfa.2025.137078","url":null,"abstract":"<div><div>In this work, a novel double-layer Ti/Fe₂O₃/Ce-PbO₂ (TFCP) electrocatalyst anode was developed on Ti substrate through the consecutive electrodeposition process with Fe₂O₃ and Ce<del>-</del>PbO₂ as the inter-layer and external layer materials, respectively. Compared with Ti/Fe₂O₃ (TF) and Ti/Ce-PbO₂ (TCP), the TFCP endows superior degradation efficiency toward levofloxacin (LFX) up to 92 % within 120 min, while TF and TCP only achieve 68.6 % and 59.7 %, respectively. The improved electrocatalytic performance can be primarily attributed to the introduction of an Fe₂O₃ interlayer beneath of the Ce<del>-</del>PbO₂, which results in lower charge transfer resistance, larger electroactive area, and higher oxygen evolution potential of the TFCP electrode in comparison to TF and TCP electrodes. Radical capture assays demonstrates that ·OH and ·O₂^- are responsible for the degradation of LFX, with ·OH being the primary reactive oxygen species (ROS). Moreover, the possible degradation routes of LFX were plausibly inferred based on the identification of degraded intermediates via liquid chromatography-mass spectrometry (LC-MS) technique together with theoretical calculation with density functional theory (DFT). In conclusion, this work provides a novel guideline for designing novel double layer anode for efficient degradation of refractory organic contaminants.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137078"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887425","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":"Ink formulations using Eu3+ doped strontium aluminates for security printing","authors":"Namratha Ullal ,&nbsp;Bibekananda Sahoo ,&nbsp;Dhanya Sunil ,&nbsp;Suresh D. Kulkarni ,&nbsp;Udaya Bhat K. ,&nbsp;Anand P.J. ,&nbsp;Ashok Rao","doi":"10.1016/j.colsurfa.2025.137081","DOIUrl":"10.1016/j.colsurfa.2025.137081","url":null,"abstract":"<div><div>Counterfeiting is a widespread menace that affects multiple sectors of society, which is increasing due to technological advancements and growing globalization of trade. It undermines economic growth, endangers public safety, damages brand integrity, and facilitates criminal activities. The present study focuses on the synthesis of thermally stable europium (Eu³⁺) doped orthorhombic Sr₄Al_l₄O₂₅ (SAO) system by solid state method for use as a colorant in the formulation of viz based and polyvinyl alcohol (PVA) based screen inks. The steady state spectrum of Eu³⁺ doped SAO depicts the charge transfer taking place between host (O^2-) and half-filled f-orbital of Eu³⁺ ion. Mono-exponential decay with lifetime value recorded in milliseconds indicates substitution of single Sr host lattice. The screen prints obtained on UV dull paper using PVA based ink with Eu³⁺ doped SAO as pigment displayed better photostability and abrasion resistance. Both Viz and PVA based formulations could serve as invisible inks for security printing and information storage applications. The prints produced using the viz-based and PVA-based formulations appeared fluorescent blue under UV illumination, while they exhibited red and green fluorescence, respectively, when viewed through long-pass filters. A user familiar with these features can easily authenticate the prints, whereas replicating them is challenging for counterfeiters.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"720 ","pages":"Article 137081"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891903","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":"Enhancing photocatalysis for organic pollutant degradation: A study on core-shell S-scheme C/Cu PDA/BiOBr heterojunctions nanoreactors","authors":"Shuaiqi Hu,&nbsp;Qian Zhang,&nbsp;Qiang Guo,&nbsp;Jintian Huang","doi":"10.1016/j.colsurfa.2025.137070","DOIUrl":"10.1016/j.colsurfa.2025.137070","url":null,"abstract":"<div><div>The formation of black nanoclusters by chelation between metal ions and dopamine is expected to be used for efficient utilization and conversion of solar energy. As a semiconductor material, BiOBr is widely used in the degradation of organic pollutants. However, its photocatalytic efficiency is limited by the wide band gap and the rapid recombination of photogenerated carriers. The construction of heterojunctions is considered to be an effective way to improve the photogenerated charge separation of BiOBr. However, the slow electron transfer is mostly due to poor interface contact and non-directional electron transfer inside the heterojunction. In this study, an S-scheme C/Cu PDA/BiOBr heterojunction photocatalyst was designed and constructed. It was used for the rapid photoreduction degradation of organic dye Congo red by in-situ chemical growth combined with freeze-drying two-step process. The optimal removal efficiency of Congo red by C/Cu PDA/BiOBr heterojunction can reach 100 %. The enhanced photocatalytic performance can be attributed to the following key factors: 1)The introduction of C/Cu PDA improves the conductivity of the material and the ability to respond to visible light, and increases the light absorption range. 2)High-quality heterogeneous interface reduces the rapid recombination of carriers. 3)The S-scheme heterojunction improves the spatial separation ability of photogenerated charges and retains the conduction band and valence band with strong redox properties. This study innovatively provides in-depth insights into the photoreduction of CR and demonstrates an environmentally friendly pollutant degradation method.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137070"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887428","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":"Nano-antibacterial strategy for durable restoration: Optimized MgO-loaded adhesive resins combat biofilm formation","authors":"Di Guo ,&nbsp;Zhongyuan Wu ,&nbsp;Ke Sun ,&nbsp;Yongliang Wang ,&nbsp;Ting Liu ,&nbsp;Qi Xue ,&nbsp;Nicholas G. Fischer ,&nbsp;Meiwen Cao ,&nbsp;Jing Fu","doi":"10.1016/j.colsurfa.2025.137083","DOIUrl":"10.1016/j.colsurfa.2025.137083","url":null,"abstract":"<div><div>During process of light-curing, dental adhesives develop internal stresses that compromise marginal integrity, leading to microbial infiltration and subsequent biological and mechanical complications. To mitigate this, we developed an antibacterial light-curing adhesive resin by incorporating magnesium oxide nanoparticles (MgONPs) and systematically evaluated its performance. At 2 wt% MgONPs loading, the adhesive demonstrated antibacterial activity against <em>Streptococcus mutans</em> (<em>S. mutans</em>) with a 94.10 % inhibition ratio, while maintaining comparable mechanical properties and bond strength. Material characterization showed an overall increase in water absorption and film thickness with increasing MgONPs ratio. Cytotoxicity assays confirmed biosafety for all groups. The optimal MgONPs ratio was identified as 1–2 wt%, achieving effective antibacterial functionality without compromising critical material properties. The study provides a viable strategy for developing durable antibacterial dental adhesives through nanomaterial integration, showing promise for preventing recurrent decay and enhancing clinical durability.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137083"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892287","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":"Facile fabrication of a ternary drug-carrying polymeric composite coatings with enhanced interface compatibility and mechanical properties by suspension flame spray","authors":"Decong Kong ,&nbsp;Meiqi Song ,&nbsp;Yonghong Pan ,&nbsp;Xierzhati Aimaier ,&nbsp;Ye Tian ,&nbsp;Rui Yang ,&nbsp;Jing Huang ,&nbsp;Yi Liu ,&nbsp;Xiaomei Liu ,&nbsp;Nikolai Boshkov ,&nbsp;Botao Zhang ,&nbsp;Hua Li","doi":"10.1016/j.colsurfa.2025.137073","DOIUrl":"10.1016/j.colsurfa.2025.137073","url":null,"abstract":"<div><div>In this study, the interface-modified ternary blends based on polylactic acid (PLLA)-polycaprolactone (PCL)-polycarbonate diols (PCDL) were prepared via suspension flame spray. Morphological analysis showed that the interface modification of PCDL significantly improves the compatibility of PLLA and PCL. Mechanical analysis revealed that the addition of PCDL resulted in great enhancement of the toughness of the PLLA/PCL composite coatings with a dramatic 326 % increase of the fracture strain for 10PLLA/90PCL/10PCDL compared with 10PLLA/90PCL. Further physicochemical and antibacterial test revealed no significant difference among PLLA/PCL and PLLA/PCL/CAM composite coatings with and without PCDL. Time-course release analysis showed that the release mechanism of the composite coating generally remains the same when the PCDL added is lower than the main components in PLLA/PCL, and even changed from the original abnormal diffusion to Fick diffusion. Overall, the ternary blending approach of PLLA-PCL-PCDL using suspension flame spray is a promising technique with great potential drug-delivery applications with different mechanical requirements.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 137073"},"PeriodicalIF":4.9,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887335","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}