D12.

Project title: Biosensitivity of Semiconductor Nanowires, a Theoretical Exploration

Semiconductor nanowires (SCNWs) are an extremely important class of materials in nanoscience and nanotechnology, as they can serve as the fundamental building blocks of future electronic, photonic and sensing devices. At CityU, we have synthesized a wide range of SCNWs in bulk quantity based on our own developed simple thermal evaporation, oxide-assisted growth method, and are actively engaging in exploring various applications of SCNWs. The application of SCNWs for biosensing devices is particularly attractive and rewarding, but less explored, and thus requires intensive research. To guide and complement experimental efforts, systematic theoretical research is critical. Further, the involved development of new computational approach and computations of large systems are of significant scientific interest.

This project will focus on revealing the sensing properties of SCNWs for biomolecules, such as glucose, lactate, urea, and glutamate/glutamine, by calculating the I-V characteristics and conductance of the SCNW-biomolecule systems. Towards the goal and to reduce the computational cost, we will develop a new computational approach, applicable to the study of transport properties of general large sized nanostructures. The gate-voltage and solvent effects will also be considered. We aim at developing and applying a theoretical scheme for the understanding and design of nanosensors.

Supervisor:
Prof R Q Zhang (aprqz@cityu.edu.hk)

Suitable for
: M.Phil./Ph. D