Xuewen Fu
Welcome to Xuewen Fu's home page! I'm currently a Research Associate at Brookhaven National Laboratory at Condensed Matter Physics and Materials Science Department. I obtained my Ph.D. from Peking University in Condensed Matter Physics in 2014 (Advisor: Prof. Dapeng Yu), and did a 2.5-year postdoc research in the Nobel Laureate Prof. Zewail group in Chemistry and Chemical Engineering Division at Caltech (2014.11-2017.05). My research area is four-dimensional ultrafast electron microscopy (4D-EM) and atomic/nanoscale ultrafast dynamics and physics. Specifically, I am interested in physical and chemical properties and related dynamical processes of functional nanomaterials during their functions by in-situ electron microscopy, 4D-EM and ultrafast nanoscale optical spectroscopy, with an emphasis on developing advanced in-situ 4D ultrafast transmission electron microscopy (UTEM),
4D ultrafast scanning electron microscopy (USEM) and 4D ultrafast cathodoluminescence (TRCL) to reveal the structural evolution and energy carrier (electrons, charges, phonons, magnon, excitons etc.) transport and interaction dynamics of functional nanomaterials at an unprecedented spatiotemporal resolution (atomic to nanoscale and femtosecond (10^-15 s) to millisecond ). I am currently working on developing operando UTEM techniques such as liquid-phase and gas-phase, in situ photon induced near field electron microscopy (PINEEM) and solid state open cell technique etc., to investigate ultrafast dynamical phenomena of nanostructures, chemical and physical systems in their native environment and real functional process.
Latest research
Optical manipulation of magnetic vortices visualized in situ by Lorentz electron microscopy
Direct Visualization of Photomorphic Reaction Dynamics of Plasmonic Nanoparticles in Liquid by Four-Dimensional Electron Microscopy
Dynamics and control of gold-encapped gallium arsenide nanowires imaged by 4D electron microscopy
Photoinduced nanobubble-driven superfast diffusion of nanoparticles imaged by 4D electron microscopy
Science Advances 3 (8), e1701160 (2017)
(Highlighted by Nanotechweb.org; PHYS.ORG; EurekAlert.org)
Imaging rotational dynamics of nanoparticles in liquid by 4D electron microscopy
(Highlighted by Science, Pro-Physik.de, ScienceNet.cn)
Strain-Gradient Modulated Exciton Emission in Bent ZnO Wires Probed by Cathodoluminescence.
ACS Nano 10 (12), 11469–11474 (2016).
Exciton Drift in Semiconductors under Uniform Strain Gradients: Application to Bent ZnO Microwires.
ACS Nano 8 (4), 3412-3420 (2014).
Size-Dependent Correlations between Strain and Phonon Frequency in Individual ZnO Nanowires.
ACS Nano 7 (10), 8891-8898 (2013).
Strain Loading Mode Dependent Bandgap Deformation Potential in ZnO Micro/Nanowires.
ACS Nano 8 (4), 3412-3420 (2015).
Tailoring Exciton Dynamics by Elastic Strain-gradient in Semiconductors.
Advanced Materials 26, 2572-2579 (2014).
Improvement of ultraviolet photoresponse of bent ZnO microwires by coupling piezoelectric and surface oxygen adsorption/desorption effects.
Nanoscale 5 (3), 916-920 (2013).