Self-Assembled Peptide Functionalized Gold Nanopolyhedrons with Excellent Chiral Optical Properties

Langmuir. 2020 Jan 21;36(2):600-608. doi: 10.1021/acs.langmuir.9b03366. Epub 2020 Jan 10.

Abstract

Because of the unique optical properties of gold nanomaterials, the preparation of gold nanomaterials with excellent chirality has received extensive attention. In order to develop a simple fabrication method for three-dimensional chiral Au nanostructures with a size of several hundred nanometers, chiral gold nanoparticles were developed to transfer chirality of a peptide to gold nanoparticles. In this study, the controlled synthesis of asymmetric gold nanopolyhedrons was achieved. The asymmetric gold nanopolyhedrons prepared via peptide-directed growth can exhibit strong circular dichroism (∼±50 mdeg) couplets in the visible range (500-600 nm). Also, the morphology of chiral Au nanododecahedrons-peptide particles showed distorted and asymmetric properties. In order to prove that the size and spatial structure of gold nanopolyhedrons have an influence on their chiral optical properties, Au nanotrioctahedron-peptide particles were prepared by using Au nanotrioctahedrons with different morphologies. Au nanotrioctahedron-peptide particles also exhibited circular dichromatic couplets in the visible region.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Gold / chemistry*
  • Metal Nanoparticles / chemistry*
  • Optical Phenomena
  • Particle Size
  • Peptides / chemical synthesis*
  • Peptides / chemistry
  • Surface Properties

Substances

  • Peptides
  • Gold