From July 29th to August 2nd, 2018, Prof. Zhen Liu attended the 47th International Symposium on High Performance Liquid Phase Separations and Related Techniques (HPLC 2018) conference in Washington, DC, and delivered an invited talk entitled "Probing Signaling Pathway Proteins of Apoptosis at the Single Cell Level via Plasmonic Immunosandwich Assay.