Issue 34, 2011

In situ controllable growth of noble metal nanodot on graphene sheet

Abstract

A facile and green method was developed for controllable growth of metal nanodot on graphene sheet. Ultrafine metal nanodots with a size of ∼2.0 nm in a narrow size distribution are uniformly decorated on graphene sheet through a sonolytic followed by hydrothermal reduction route without extra reducing agent. While hydrothermal reduction without sonolytic treatment, metal nanocrystal with a diameter of ∼18 nm grows on graphene sheet. The size-selective growth of metal nanodots on graphene sheet arises from the higher diffusion barrier in metal ion doped graphene oxide (GO) system formed during sonolytic process and limited the size of growing metal nanodot. X-Ray photoelectron spectroscopy (XPS) spectra suggest there is a size-dependent alternation of electronic structure of metal nanodot on graphene sheet, giving rise to unusual electronic and catalytic properties. The synthetic strategies described here were expanded on the range of metal nanodot/graphene composites, paving new avenues for the nanodot buildup and therefore promoting functionality.

Graphical abstract: In situ controllable growth of noble metal nanodot on graphene sheet

Supplementary files

Article information

Article type
Paper
Submitted
23 Mar 2011
Accepted
17 Jun 2011
First published
29 Jul 2011

J. Mater. Chem., 2011,21, 12986-12990

In situ controllable growth of noble metal nanodot on graphene sheet

H. Zhang, S. Chen, X. Quan, H. Yu and H. Zhao, J. Mater. Chem., 2011, 21, 12986 DOI: 10.1039/C1JM11231G

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