Research fields

1. Development of photodetectors or photovoltaic devices using non-equilibrium heated carriers: use of plasmons decay into hot carriers for high-efficiency device.

2. Development of display pixels using subpicosecond thermalized hot carriers generated from quantum dots-plasmon coupling: use of quantum dot-plasmon coupling for fast-responding devices.

3. Development of Ultrahigh-sensitivity optical biosensors based on plasmon hot-carrier dynamics: immonoassay detection of sex hormones (17-beta estradiol and testosterone) in human urine for early diagnosis of precocious puberty.

4. Plasmon-enhanced magneto-optical devices: optical memory, isolators, and motors.

Research fields

1. Metal halide perovskite nanocrystals – synthesis, optoelectronic properties, and applications in LED, photocatalysis, chemical sensor, and piezoelectric generator

2. Colloidal self-assembly – synthesis of (organic/ inorganic) nanocrystals, assembly, colloidal physics, and dynamics

3. Polymer nanocomposites – polymer-grafted nanoparticles and their applications in optical films, EMI, and thermal conductive sheets

4. Polymer physics – dynamics and phase separation in polymer nanocomposites

Research fields

His interest includes the field of scanning probe microscopy (SPM) on the organic superconductors, metal/semiconductor interfaces, surfactant effect of hydrogen in crystal growth. In addition he is now focusing the fabrication of nanocarbon materials such as carbon nanotube and graphene by chemical vapor deposition or chemical exfoliation methods, for the application to lithium ion battery, fuel cells, functional superhydrophobic materials, etc. He is currently interested in tip-enhanced Raman scattering spectroscopy to characterize carbon materials at nanometer scale using custom-made high sensitive probes. 

Research fields

1. Sample preparation to reduce ion beam damage with Cryo-FIB (Focused Ion Beam)

2. Surface and Structural Characterization of Carbon Materials Using SEM (Scanning Electron Microscopy)