Single-crystal Au microflakes modulated by amino acids and their sensing and catalytic properties

Journal of Colloid and Interface Science
Mingjie LiChaoxu Li

Abstract

Single-crystal Au microflakes with the planar area over 10(3)μm(2) (i.e. being accessible to the human eye resolution) were synthesized in an environment-friendly route by directing two-dimensional growth of Au nanocrystals into macroscopic scales with amino acids as both reducing agents and capping agents. Side groups of amino acids were found to be a determinant parameter to tune the dimension and size of Au single crystals. The successful synthesis of Au microflakes provides an unprecedented opportunity to bridge nanotechnology and macroscopic devices, and hereby to start a new scenario of exploring their unique properties and applications in optoelectronic devices and bio-sensing fields across multiple length scales. For example, Au microflakes respond to air humidity upon depositing on films of chitin nanofibrils, and sense various physiological molecules as electrode materials of biosensors.

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Citations

Sep 27, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Kranthi Kumar GanguSreekantha B Jonnalagadda
Dec 18, 2019·Chemical Communications : Chem Comm·Lili LvChaoxu Li
Aug 2, 2017·ACS Applied Materials & Interfaces·Fengling WangYuan Huang

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