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Qingteng Zhang

Assistant Physicist

Microsecond-to-second-resolved Mesoscale Dynamics Studied with XPCS

Biography

Qingteng Zhang (张庆腾) received his B. Eng. in Electrical Engineering from Xi’an Jiaotong University, China, in 2009 and his Ph.D. in Applied Physics from the University of South Florida in 2012. His Ph.D. project focused on molecular dynamics simulations of non-equilibrium properties of ferroelectric perovskites. Following his Ph.D., he joined Prof. Paul Evans’ group at the University of Wisconsin-Madison as a post-doc where he continued his studies of non-equilibrium dynamics in ferroelectrics but with pump-probe synchrotron x-ray techniques. He became a user of the Advanced Photon Source (APS) in October 2012 and subsequently joined the APS as a postdoctoral researcher in May 2015. Qingteng’s research at the APS has focused on investigating the dynamics of meso-scaled structures in both hard and soft condensed matter using microsecond-resolved x-ray photon correlation spectroscopy (XPCS). To accomplish his research, Qingteng led the commissioning and deployment of a high frame rate, high fidelity, photon-counting area detector ideally suited for XPCS measurements. As well as producing high impact science, Qingteng’s work has been an important step in demonstrating that microsecond-resolved XPCS will blossom at the APS after the APS upgrade (APS-U).

Selected Publications:

Dynamic Scaling of Colloidal Gel Formation at Intermediate Concentrations, Physical Review Letters, 119, 178006 (2017)

Thermal Fluctuations of Ferroelectric Nanodomains in a Ferroelectric-Dielectric PbTiO3 / SrTiO3 Superlattice, Physical Review Letters, 118, 097601 (2017)

Nanodynamics of Ferroelectric Ultrathin Films, Physical Review Letters, 107, 177601 (2011)

Microscopic Insight into Temperature-Graded Ferroelectrics, Physical Review Letters, 105, 147602 (2010)