Dr. He's major research focus is to develop and apply the most advanced and innovative analytical techniques to help solve critical and emerging issues in food science. The central tool of Lili’s research is surface enhanced Raman spectroscopy (SERS), which is a combination of Raman spectroscopy and nano-techniques. The use of metallic nanostructure enhances the Raman signals more than a million times. Her group has developed various SERS based techniques for food safety and food chemistry applications.