Layered Silicate Clays as Templates for Anisotropic Gold Nanoparticle Growth [component]

Layered silicate clays as templates for anisotropic gold nanoparticle growth Chemistry of materials -ISSN 0897-4756 -28:14(2016), p. 5131-5139 Full text (Publisher's DOI): Clay minerals are abundant natural materials arising in the presence of water, and are composed of small particles of different sizes and shapes. The interlamellar space between layered silicate clays can also be used to host a variety of different organic and inorganic guest molecules or particles.
more » ... cules or particles. Recent studies of clay-metal hybrids formed by impregnation of nanoparticles into the interlayer spaces of the clays have not demonstrated the ability for templated growth following the shape of the particles. Following this line of interest, a method for the synthesis of gold nanoparticles on the synthetic layered silicate clay laponite was developed. This approach can be used to make metal-clay nanoparticles with a variety of morphologies while retaining the molecular adsorption properties of the clay. The SERS enhancement of these particles was also found to be greater than that obtained from metal nanoparticles of a similar morphology, likely due to increased dye adsorption from the presence of the clay. The hybrid particles presented herein will contribute to further study of plasmonic sensing, catalysis, dye aggregation, and novel composite materials.
doi:10.1021/acs.chemmater.6b02186.s001 fatcat:zgrwartahjdbng22mplf7vi3za