{"title":"","authors":"Xiumei Xie, Zhongfu Ling, Dehui Li and Hua Zou*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 30","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.langmuir.5c01926","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144770394","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":"Preparation of Core-Shell Magnetic Mesoporous Silica Composite Microspheres and Drug Loading Study.","authors":"Rongying Chen,Chunyin Li,Yuanyuan Huang,Xinyu Song,Hongli Li,Minglong Yuan","doi":"10.1021/acs.langmuir.5c02719","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c02719","url":null,"abstract":"Fe3O4@mSiO2 composite microspheres were synthesized via the sol-gel method, employing sodium citrate (Na3CA)-modified magnetic Fe3O4 nanoparticles as the core material, cetyltrimethylammonium bromide (CTAB) as the templating agent, and tetraethyl orthosilicate (TEOS) as the silica source. The dispersion, mesoporous structure, and spherical morphology of the composite microspheres were significantly influenced by the amount of templating agent, as evidenced by the electron microscopy and transmission electron microscopy results. Particle size and Brunauer-Emmett-Teller analyses indicated that increasing the templating agent dosage promoted larger particle sizes and enhanced the total pore capacity of composite microspheres with 20 and 50 nm Fe3O4 cores. Notably, the 50 nm Fe3O4@mSiO2-3.5 microspheres exhibited the largest total pore capacity, measuring 0.2955 cm3/g. In contrast, composite microspheres with 100 nm Fe3O4 cores exhibited opposite trends in particle size and pore capacity. All composite microspheres exhibited superparamagnetic behavior, with hysteresis loops at room temperature and maximum magnetization intensities ranging from 33.92 to 81.83 emu/g. Drug loading and release studies revealed that the 100 nm Fe3O4@mSiO2-3.0 composite microspheres achieved the highest drug loading capacity, with a rate of 18.36 ± 0.08%. Moreover, the drug-loaded microspheres exhibited faster release rates in PBS buffer at pH 6.8, while slower release was observed at pH 5.0 and pH 7.4.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"15 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144778293","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}
LangmuirPub Date : 2025-08-05DOI: 10.1021/acs.langmuir.5c02752
Lei Dong,Yuxuan Zhang
{"title":"A Robust Hybrid Skeleton for Omnidirectional Underwater Bubble Collection.","authors":"Lei Dong,Yuxuan Zhang","doi":"10.1021/acs.langmuir.5c02752","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c02752","url":null,"abstract":"Underwater bubble capture using superhydrophobic surfaces (underwater superaerophilicity) is vital for the survival of certain aquatic organisms and has great potential for application in industry. However, surface-exclusive coatings often demonstrate limitations in bubble capture efficiency since they are restricted to single-direction capture and face a trade-off between capture and mobility on the same surface. Additionally, this kind of coating usually fails due to the irreversible transition from the Cassie-Baxter state to the Wenzel state, leading to wetting. Current research mainly focuses on metals and polymers, which lack the durability to endure harsh underwater environments and thus limits their real-world applications. Organisms with a bone-muscle structure exhibit multifunctionality and high durability. Inspired by this, we report for the first time a superhydrophobic hybrid skeleton─featuring a bone-like support of in situ-grown mullite whiskers and a muscle-like functional phase of heat-solidified silicone oil─for underwater bubble collection. This hybrid skeleton demonstrates excellent chemical, thermal, and mechanical stability since it can retain superhydrophobicity even when submerged in strong base, acid, or salt water for 8 h, heated at 450 °C for 4 h, or crushed into powder. Our findings demonstrate that the hybrid skeleton enables omnidirectional underwater bubble collection and even resists buoyancy to facilitate continuous bubble capture and transport. Furthermore, the hybrid skeleton features a pore size of ∼1 μm, more than 100 times smaller than previously reported values, which extends the liquid entry pressure from a few centimeters to approximately 30 m. This study provides a practical solution for underwater bubble collection, overcoming the constraints of surface-only modifications and the material limitations of polymers and metals prevalent in current research.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"144 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144786958","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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