title: Natural tubule clay template synthesis of silver nanorods for antibacterial composite coating.
abstract: Halloysite is naturally available clay mineral with hollow cylindrical geometry and it is available in thousands of tons. Silver nanorods were synthesized inside the lumen of the halloysite by thermal decomposition of the silver acetate, which was loaded into halloysite from an aqueous solution by vacuum cycling. Images of individual ca. 15 nm diameter silver nanorods and nanoparticles were observed with TEM. The presence of silver inside the tubes was also verified with STEM-EDX elemental mapping. Nanorods had crystalline nature with [111] axis oriented ~68° from the halloysite tubule main axis. The composite of silver nanorods encased in clay tubes with the polymer paint was prepared, and the coating antimicrobial activity combined with tensile strength increase was demonstrated. Coating containing up 5% silver loaded halloysite did not change color after light exposure contrary to the sample prepared with loading with unshelled silver nanoparticles. Halloysite tube templates have a potential for scalable manufacturing of ceramic encapsulated metal nanorods for composite materials.
authors: Institute for Micromanufacturing, Louisiana Tech University, 911 Hergot Avenue, Ruston, Louisiana 71272, USA.
authors: Elshad
authors: E
authors: Abdullayev
authors: Keita
authors: K
authors: Sakakibara
authors: Ken
authors: K
authors: Okamoto
authors: Wenbo
authors: W
authors: Wei
authors: Katsuhiko
authors: K
authors: Ariga
authors: Yuri
authors: Y
authors: Lvov
mesh_terms: D000085:Acetates / Q000737:chemistry* / Q000494:pharmacology; D000538:Aluminum Silicates / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D000077215:Clay; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development; D043942:Nanotubes / Q000737:chemistry*; D010150:Paint / Q000032:analysis; D010316:Particle Size; D018030:Silver Compounds / Q000737:chemistry* / Q000494:pharmacology; D013211:Staphylococcus aureus / Q000187:drug effects / Q000254:growth & development
chemical_list: D000085:Acetates; D000538:Aluminum Silicates; D000900:Anti-Bacterial Agents; D018030:Silver Compounds; C103100:silver acetate; D000077215:Clay