Jump to main content
Jump to site search


One-step selective formation of silver nanoparticles on atomic layered MoS2 by laser-induced defect engineering and photoreduction

Abstract

Two dimensional (2D) materials decorated with noble metal nanoparticles (NPs) have attracted wide attention due to their appealing chemical and physical properties. Herein, we have developed a novel approach to controllable and selective decoration of silver NPs on atomic layered molybdenum disulfide (MoS2) by one-step laser-induced defect engineering and photoreduction. By employing a focused micro-power laser beam, silver NPs can be rapidly (in seconds) anchored onto the irradiated area of MoS2 flakes, forming 0D/2D AgNPs@MoS2 heterostructures. The mechanism for silver growth on MoS2 flakes was based on the laser-induced defects creation in silver ion enviroment and silver nucleation on laser-excited MoS2 flake surfaces, as evidenced by a combination of techniques including Raman spectroscopy, atomic force microscopy and second-harmonic generation. We also found that the morphology and the growth rate of silver NPs are highly dependent on the layer thickness of MoS2 and the laser irradiation power; while the size and number density of silver NPs could be precisely controlled by varying the irradiation time as well as the silver ion concentration. Finally, AgNPs@MoS2 heterostructure micro-patterns have been successfully demonstrated via a programed low-power laser scan, which show a great potential to be used as an efficient surface enhanced Raman scattering platform for chemical sensing.

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Apr 2017, accepted on 03 Aug 2017 and first published on 04 Aug 2017


Article type: Paper
DOI: 10.1039/C7TC01863K
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
  •   Request permissions

    One-step selective formation of silver nanoparticles on atomic layered MoS2 by laser-induced defect engineering and photoreduction

    Y.T. Lei, D. Li, T. C. Zhang, X. Huang, L. Liu and Y. Lu, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC01863K

Search articles by author

Spotlight

Advertisements