Title

Photoluminescence quenching in gold - MoS2 hybrid nanoflakes

Authors

Authors

U. Bhanu; M. R. Islam; L. Tetard;S. I. Khondaker

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Sci Rep

Keywords

SINGLE-LAYER MOS2; MONOLAYER MOS2; VALLEY POLARIZATION; WORK FUNCTION; GRAPHENE; NANOPARTICLES; TRANSISTORS; HETEROSTRUCTURES; PHOTOTRANSISTORS; TRANSITION; Multidisciplinary Sciences

Abstract

Achieving tunability of two dimensional (2D) transition metal dichalcogenides (TMDs) functions calls for the introduction of hybrid 2D materials by means of localized interactions with zero dimensional (0D) materials. A metal-semiconductor interface, as in gold (Au) - molybdenum disulfide (MoS2), is of great interest from the standpoint of fundamental science as it constitutes an outstanding platform to investigate plasmonic-exciton interactions and charge transfer. The applied aspects of such systems introduce new options for electronics, photovoltaics, detectors, gas sensing, catalysis, and biosensing. Here we consider pristine MoS2 and study its interaction with Au nanoislands, resulting in local variations of photoluminescence (PL) in Au-MoS2 hybrid structures. By depositing monolayers of Au on MoS2, we investigate the electronic structure of the resulting hybrid systems. We present strong evidence of PL quenching of MoS2 as a result of charge transfer from MoS2 to Au: p-doping of MoS2. The results suggest new avenues for 2D nanoelectronics, active control of transport or catalytic properties.

Journal Title

Scientific Reports

Volume

4

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

5

WOS Identifier

WOS:000338506300003

ISSN

2045-2322

Share

COinS