We develop scanning probe microscopy and laser spectroscopy for chemical measurement and imaging at the nanometer scale. We study light-matter interactions at the nanoscale, revealing the compositional, organization and functions of macromolecules and nanomaterials. We are interested in the infrared responses and the electrical properties.
Xiaoji Xu
Associate Professor
Danser Distinguished Faculty Chair in Chemistry
610.758.6271
xgx214@lehigh.edu
Sinclair Laboratory, Room 310C
Education:
B.Sc. Chemistry, Peking University, 2004
Ph.D. University of British Columbia, Vancouver, Canada, 2009
Explore this Profile×
Research Statement
Biography
Dr. Xu was trained as an ultrafast spectroscopist during his PhD. Afterward, his research interest gradually shifted towards scanning probe microscopy, especially when combined with lasers. His current research interest is primarily on new instrument development for research at the frontiers. Dr. Xu holds several patents on scanning probe microscopy and is a senior member of the National Academy of Inventors.
Scholarship
Qing Xie, Yu Zhang, Eli Janzen, James H. Edgar, and Xiaoji G. Xu "Atomic-force-microscopy-based time-domain two-dimensional infrared nanospectroscopy" Nature Nanotechnology, 19, 1108-1115 (2024)
Le Wang, Haomin Wang, and Xiaoji G. Xu "Principle and Applications of Peak Force Infrared Microscopy" Chemical Society Reviews, 51, 5268 - 5286 (2022)
Haomin Wang, Joseph M. González-Fialkowski, Wenqian Li, Qing Xie, Yan Yu, and Xiaoji G. Xu “Liquid-Phase Peak Force Infrared Microscopy for Chemical Nano-imaging and Spectroscopy” Analytical Chemistry, 93, 7, 3567-3575 (2021)
Devon S. Jakob, Haomin Wang, Guanghong Zeng, Daniel E. Otzen, Yong Yan, and Xiaoji G. Xu “Peak Force Infrared – Kelvin Probe Force Microscopy” Angewandte Chemie Int. Ed., 59, 16083 (2020)
Devon S. Jakob, Haomin Wang, and Xiaoji G. Xu “Pulsed Force Kelvin Probe Force Microscopy” ACS Nano, 14, 4, 4839-4848 (2020)
Haomin Wang, Le Wang, Devon S. Jakob, and Xiaoji G. Xu “Tomographic and Multimodal Scattering-Type Scanning Near-field Optical Microscopy with Peak Force Tapping Mode” Nature Communications, 9:2005 (2018)
Le Wang, Haomin Wang, Martin Wagner, Yong Yan, Devon S. Jakob and Xiaoji G. Xu “Nanoscale Simultaneous Chemical and Mechanical Imaging via Peak Force Infrared Microscopy” Science Advances, 3, 6, e1700255 (2017)
Haomin Wang, Le Wang and Xiaoji G. Xu “Scattering-type Scanning Near-field Optical Microscopy with Low Repetition Rate Pulsed Light Source through Phase-domain Sampling” Nature Communications, 7:13212 (2016)
Le Wang and Xiaoji G. Xu “Scattering Type Scanning Near-field Optical Microscopy with Reconstruction of Vertical Interaction” Nature Communications, 6:8973 (2015).
Teaching
CHM31 General Chemistry
CHM341 Physical Chemistry I
CHM343 Physical Chemistry Lab
CHM488 Special Topics in Physical Chemistry