Photoluminescence enhancement in few-layer WS2 films via Au nanoparticles | Zendy

Sin Yuk Choi | Zendy; ChoTung Yip | Zendy; Guang-Can Li | Zendy; Dangyuan Lei | Zendy; Kin Hung Fung | Zendy; S. F. Yu | Zendy; Jianhua Hao | Zendy

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Photoluminescence enhancement in few-layer WS2 films via Au nanoparticles

Author(s) -

Sin Yuk Choi,

ChoTung Yip,

Guang-Can Li,

Dangyuan Lei,

Kin Hung Fung,

S. F. Yu,

Jianhua Hao

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4923183

Subject(s) - photoluminescence , materials science , nanoparticle , plasmon , absorption (acoustics) , layer (electronics) , chemical engineering , aqueous solution , nanotechnology , surface plasmon , scanning electron microscope , optoelectronics , composite material , chemistry , engineering

Nano-composites of two-dimensional atomic layered WS2 and Au nanoparticles (AuNPs) have been fabricated by sulfurization of sputtered W films followed by immersing into HAuCl4 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 WS2. We have compared the optical absorption and photoluminescence of bare WS2 and Au-decorated WS2 layers. Enhancement in the photoluminescence is observed in the Au-WS2 nano-composites, attributed to localized surface plasmonic effect. This work provides the possibility to develop photonic application in two-dimensional materials.Department of Applied Physic

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