Abstract
Edge-active site control of MoS2 is crucial for applications such as chemical catalysis, synthesis of functional composites, and biochemical sensing. This work presents a novel nonthermal method to simultaneously tune surface chemical (edge-active sites) and physical (surface periodic micro/nano structures) properties of MoS2 using temporally shaped femtosecond pulses, through which shape-controlled gold nanoparticles are in situ and self-assembly grown on MoS2 surfaces to form Au-MoS2 hybrids. The edge-active sites with unbound sulfurs of laser-treated MoS2 drive the reduction of gold nanoparticles, while the surface periodic structures of laser-treated MoS2 assist the shape-controllable growth of gold nanoparticles. The proposed novel method highlights the broad application potential of MoS2; for example, these Au-MoS2 hybrids exhibit tunable and highly sensitive SERS activity with an enhancement factor up to 1.2 × 107, indicating the marked potential of MoS2 in future chemical and biological sensing applications.
Original language | English (US) |
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Pages (from-to) | 7447-7455 |
Number of pages | 9 |
Journal | ACS Applied Materials and Interfaces |
Volume | 9 |
Issue number | 8 |
DOIs | |
State | Published - Mar 1 2017 |
Keywords
- Au-MoS hybrids
- MoS film
- edge-active site
- periodic surface structure
- shaped femtosecond pulse
ASJC Scopus subject areas
- General Materials Science