Layered Silicate Clays as Templates for Anisotropic Gold Nanoparticle Growth

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• 作者：Eric H. Hill ; Nathalie Claes ; Sara Bals ; Luis M. Liz-Marzán
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：July 26, 2016
• 年：2016
• 卷：28
• 期：14
• 页码：5131-5139
• 全文大小：568K
• 年卷期：0
• ISSN：1520-5002

文摘

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. 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 surface enhanced Raman scattering enhancement of these particles was also found to be greater than that obtained from other metal nanoparticles of a similar morphology, likely due to increased dye adsorption by 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.