Coating matters: the influence of coating materials on the optical properties of gold nanoparticles

Munish Chanana and Luis M. Liz-Marzán
  • 1 Departamento de Química Física, Universidade de Vigo, 36310, Vigo, Spain
  • 2 Wood Materials Science, ETH Zürich, Institute for Building Materials (IfB), HIF E 24, Schafmattstr. 6, 8093 Zürich, Switzerland
  • 3 CIC biomaGUNE, Paseo de Miramón 182, 20009 San Sebastian, Spain
  • 4 Ikerbasque, Basque Foundation for Science, 48011 Bilbao, Spain

Abstract

An essential element in the synthesis of nanomaterials based on gold nanoparticles comprises the control over parameters such as size, shape and composition, due to their strong influence on the properties of the particles. However, it is the coating material which often plays the primary role in tuning the size, morphology, and even plasmon resonance wavelength or mode multiplicity, as well as colloidal stability and functional versatility, ultimately determining the physical, chemical, optical, electronic and catalytic properties of the nanoparticles. Therefore, it is utterly important to select the adequate wet chemistry synthetic approach with the most suitable coating material for the preparation of gold nanoparticles with the desired requirements. Within this context, this review is focused on describing various types of organic and inorganic coating materials for gold nanoparticles that may notably affect their optical properties by either directly influencing the synthesis procedure or by changing their chemical and physical properties upon post-synthetic modifications, such that they exhibit novel and useful optical properties.

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Nanophotonics covers recent international research results, specific developments in the field and novel applications. Nanophotonics focuses on the interaction of photons with nano-structures, such as carbon nanotubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue and DNA. It belongs to the top journals in the field.

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