Research highlighted:Characterization, Simulation and Application of Graphene
GRAPHENE AND 2D MATERIALS

Graphene and 2D materials exhibit unique electronic, optical, chemical and mechanical properties that make them ideal candidates for fundamental study as well as many potential applications. Our group currently focuses on:  

  • Fabrication: mechanical exfoliation, CVD growth, chemical and electrochemical methods.
  • Characterization: Raman, IR, reflection & ultrafast spectroscopy, AFM, SEM, TEM, electrical, etc.  
  • Topics of study: optical, electronic & electrical properties, folded and mis-oriented graphene, crystal orientation determination, edge stability, intercalation, stacking order, ultralow doping concentration detection, etc.

GRAPHENE

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TRANSITION METAL DICHALCOGENIDES (TMDs)
PLASMONICS AND NEAR-FIELD RAMAN MICROSCOPY
  • Plasmonic properties of nanostructures experimentally and theoretically. The nanostructures such as nanobowls, nanowires and nanoflakes have shown promising plasmonic properties and are expected for the applications of waveguiding, SERS and TERS.
  • Development of near-field spectroscopic techniques combining three advanced techniques: atomic force microscopy, optical tweezer and Raman/PL imaging.

 

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GRAPHENE HYBRIDS FOR ENERGY STORAGE


3D graphene form (GF) are used as lightweight substrates to fabricate flexible, binder-free hybrid electrodes with higher electric conductivity and better structural stability.

  • 3D GF based laminate, bilayer, arrays structures.
  • GF based ZnO, Fe3O4, V2O5, VO2, MoS2, PEDOT etc. for application in Li-ion, Na-ion batteries and supercapacitors.

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  • A GF-CNT substrates are adopted as scaffolds to accommodate metal oxides, metal sulfides, sulfur, etc. with higher loading mass and better electric conductivity.

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SELECTED PUBLICATIONS:
Nat. Commun. 2013, 4, 2074; Phys. Rev. Lett. 2013, 111, 126801; ACS Nano, 2012, 6, 5941; Nano Lett. 2013,13, 6135; Adv. Mater. 2014, 26, 5794; Adv. Mater. 2014, 26, 7162; US patent appl #: 12/660.000;