Anisotropic metal nanoparticles: Synthesis, assembly, and optical applications

Catherine J. Murphy, Tapan K. Sau, Anand M. Gole, Christopher J. Orendorff, Jinxin Gao, Linfeng Gou, Simona E. Hunyadi, Tan Li

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Abstract

This feature article highlights work from the authors' laboratories on the synthesis, assembly, reactivity, and optical applications of metallic nanoparticles of nonspherical shape, especially nanorods. The synthesis is a seed-mediated growth procedure, in which metal salts are reduced initially with a strong reducing agent, in water, to produce ∼4 nm seed particles. Subsequent reduction of more metal salt with a weak reducing agent, in the presence of structure-directing additives, leads to the controlled formation of nanorods of specified aspect ratio and can also yield other shapes of nanoparticles (stars, tetrapods, blocks, cubes, etc.). Variations in reaction conditions and crystallographic analysis of gold nanorods have led to insight into the growth mechanism of these materials. Assembly of nanorods can be driven by simple evaporation from solution or by rational design with molecular-scale connectors. Short nanorods appear to be more chemically reactive than long nanorods. Finally, optical applications in sensing and imaging, which take advantage of the visible light absorption and scattering properties of the nanorods, are discussed.

Original languageEnglish (US)
Pages (from-to)13857-13870
Number of pages14
JournalJournal of Physical Chemistry B
Volume109
Issue number29
DOIs
StatePublished - Jul 28 2005

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ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Murphy, C. J., Sau, T. K., Gole, A. M., Orendorff, C. J., Gao, J., Gou, L., Hunyadi, S. E., & Li, T. (2005). Anisotropic metal nanoparticles: Synthesis, assembly, and optical applications. Journal of Physical Chemistry B, 109(29), 13857-13870. https://doi.org/10.1021/jp0516846