Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 10, Pages 4040-4046Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200896d
Keywords
tubule clays; silver nanorods; template synthesis; antibacterial
Funding
- Louisiana BoR-ITRS
- [NSF-1029147]
- [NSF-EPS1003897]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1029147] Funding Source: National Science Foundation
- EPSCoR
- Office Of The Director [1003897, GRANTS:14029809] Funding Source: National Science Foundation
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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 similar to 68 degrees 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.
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