Au@MoS2 Core-Shell Heterostructures with Strong Light-Matter Interactions

Yuan Li, Jeffrey D. Cain, Eve D. Hanson, Akshay A. Murthy, Shiqiang Hao, Fengyuan Shi, Qianqian Li, Chris Wolverton, Xinqi Chen*, Vinayak P. Dravid

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

There are emerging opportunities to harness diverse and complex geometric architectures based on nominal two-dimensional atomically layered structures. Herein we report synthesis and properties of a new core-shell heterostructure, termed Au@MoS2, where the Au nanoparticle is snugly and contiguously encapsulated by few shells of MoS2 atomic layers. The heterostructures were synthesized by direct growth of multilayer fullerene-like MoS2 shell on Au nanoparticle cores. The Au@MoS2 heterostructures exhibit interesting light-matter interactions due to the structural curvature of MoS2 shell and the plasmonic effect from the underlying Au nanoparticle core. We observed significantly enhanced Raman scattering and photoluminescence emission on these heterostructures. We attribute these enhancements to the surface plasmon-induced electric field, which simulations show to mainly localize within the MoS2 shell. We also found potential evidence for the charge transfer-induced doping effect on the MoS2 shell. The DFT calculations further reveal that the structural curvature of MoS2 shell results in a modification of its electronic structure, which may facilitate the charge transfer from MoS2 to Au. Such Au@MoS2 core-shell heterostructures have the potential for future optoelectronic devices, optical imaging, and other energy-environmental applications.

Original languageEnglish (US)
Pages (from-to)7696-7702
Number of pages7
JournalNano letters
Volume16
Issue number12
DOIs
StatePublished - Dec 14 2016

Keywords

  • Au@MoS core-shell heterostructures
  • CVD
  • Raman enhancement
  • patterning
  • photoluminescence

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Au@MoS<sub>2</sub> Core-Shell Heterostructures with Strong Light-Matter Interactions'. Together they form a unique fingerprint.

Cite this