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Title: Photoluminescence enhancement in few-layer WS{sub 2} films via Au nanoparticles

Nano-composites of two-dimensional atomic layered WS{sub 2} and Au nanoparticles (AuNPs) have been fabricated by sulfurization of sputtered W films followed by immersing into HAuCl{sub 4} aqueous solution. The morphology, structure and AuNPs distribution have been characterized by electron microscopy. The decorated AuNPs can be more densely formed on the edge and defective sites of triangle WS{sub 2}. We have compared the optical absorption and photoluminescence of bare WS{sub 2} and Au-decorated WS{sub 2} layers. Enhancement in the photoluminescence is observed in the Au-WS{sub 2} nano-composites, attributed to localized surface plasmonic effect. This work provides the possibility to develop photonic application in two-dimensional materials.
Authors:
; ; ; ; ; ;  [1]
  1. Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong (China)
Publication Date:
OSTI Identifier:
22493911
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 6; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; AQUEOUS SOLUTIONS; COMPARATIVE EVALUATIONS; ELECTRON MICROSCOPY; FILMS; GOLD; LAYERS; MORPHOLOGY; NANOPARTICLES; PHOTOLUMINESCENCE; SPUTTERING; SURFACES; TUNGSTEN SULFIDES; TWO-DIMENSIONAL SYSTEMS