Light driven growth of silver nanoplatelets on 2D MoS2 nanosheet templates

T. Daeneke; B. J. Carey; A. F. Chrimes; J. Zhen Ou; D. W. M. Lau; B. C. Gibson; M. Bhaskaran; K. Kalantar-zadeh

doi:10.1039/C5TC00288E

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Light driven growth of silver nanoplatelets on 2D MoS₂ nanosheet templates†

T. Daeneke,*^a B. J. Carey,^a A. F. Chrimes,^a J. Zhen Ou,^a D. W. M. Lau,^b B. C. Gibson,^b M. Bhaskaran^c and K. Kalantar-zadeh*^a

Author affiliations

* Corresponding authors

^a School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia
E-mail: Torben.Daeneke@RMIT.edu.au, Kourosh.Kalantar@RMIT.edu.au

^b Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, RMIT University, Melbourne, Victoria, Australia

^c Functional Materials and Microsystems Research Group, School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia

Abstract

A novel synthesis approach for the fabrication of silver nanoparticles and platelets using MoS₂ nanosheets has been investigated herein, which is based on the direct photo excitation of the semiconductor bandgap in the presence of silver ions. The silver ions were effectively reduced to silver metal and a range of silver–MoS₂ heterostructures were synthesised, depending on illumination time. Short light exposure led to the formation of silver nanoparticles on the MoS₂ sheets. Longer illumination time led to a templated growth mechanism and the formation of large silver nanoplatelets, fully encapsulating the MoS₂ templates. These silver nanoplatelets were found to self-assemble into large micrometre sized silver nanodendrites/nanobranches which were effectively used as a surface enhanced Raman spectroscopy platform.

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Article information

DOI: https://doi.org/10.1039/C5TC00288E
Article type: Paper
Submitted: 29 Jan 2015
Accepted: 09 Apr 2015
First published: 13 Apr 2015

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J. Mater. Chem. C, 2015,3, 4771-4778

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Light driven growth of silver nanoplatelets on 2D MoS₂ nanosheet templates

T. Daeneke, B. J. Carey, A. F. Chrimes, J. Z. Ou, D. W. M. Lau, B. C. Gibson, M. Bhaskaran and K. Kalantar-zadeh, J. Mater. Chem. C, 2015, 3, 4771 DOI: 10.1039/C5TC00288E

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Journal of Materials Chemistry C