My Research interests includes two aspects. One is about the quantum transport and electron properties in nano systems such as graphene, carbon nanotubes, silicon nano-wires and other 2D materials.
Another is about the molecular aggregations and self-assembling in solutions, such as the morphology and phase transition of micelles, vesicles and colloids in water.
(1) Quantum Transport
I employ some theoretical methods such as the non-equilibrium Green's function (NEGF) theory to study the quantum transport of electrons in nano and mesoscopic systems.
I also use some model systems to study the spin polarization and the electron-phonon or electron-photon interactions in these nano structures.
For the 2D materials, we also study the topological phase transitions due to the external fields and the spin-orbital coupling among them.
The following methods or materials are the objects of my research.
Transfer matrix method
Boundary matching method
Non-equilibrium Green’s function theory
Density functional theory and the first principle
calculations (DFTB model, Vasp, Material Studio)
Hubbard model and the spin polarization
Graphene systems and 2D materials
Silicon nano-wires and carbon nanotubes
(2) Molecular Aggregation
I use some optical detection methods, such as the non-linear optical scattering
and spectroscopy to study the molecular aggregation process, including the phase
transition, surface reconstruction and the dynamic assembling.
I also use the molecular dynamics and some
stochastic theory to further investigate the detailed aggregation dynamics and
explain the experimental results.
The following methods or software are the tools I use in the molecular aggregation.
Hyper-Rayleigh Scattering method
Dynamic optical scattering method
UV-Vis absorption spectroscopy
Steady and dynamic fluorescence spectroscopy
Molecular Dynamics (Lammps, Gromacs)
Monte Carlo simulation
Langevin and Brownian dynamics
Fokker-Planck equation
Cellular Automaton model