Associate Professor Yunfei Xie's resreach of special interest are - Food safety & quality control, based on developing novel and rapid detection methods on food safety including food processing, food storage, food circulation and so on. The novel and rapid measurement methods include surface-enhanced Raman spectroscopy (SERS), fluorescence, IR, NIR and UV-Vis, etc. Besides, Dr. Xie studies the quality control technologies combining biological and chemical technique by extraction and utilization of active substances from vegetables and plants to do antibacterial agent and study the bacteriostasis mechanism.