个人简介

Education 2011 Ph.D., University of Wisconsin, Madison 2006 B.S., Peking University Appointments 2014 Asst. Professor, UCSD 2011 Postdoc, University of Colorado, Boulder Awards and Academic Honors 2020Sloan Research Fellowship 2019NSF CAREER Award 2019ACS JPC&PHYS Lectureship Award 2017DARPA Director's Fellowship 2016AFOSR Young Investigator Program Award (YIP) 2015DARPA Young Faculty Award (YFA)

研究领域

Physical/Analytical Chemistry

1. Theoretical results demonstrate that interfacial molecular conformations directly influence charge separation dynamics in polymer blend solar cells. Experimentally, it would be very beneficial to be able to monitor the interaction between interfacial conformations and dynamics. However, since charge separation mostly happens at disordered hidden interfaces in thick samples, it is very challenging to capture such processes using existing spectroscopic techniques. We will develop ultrafast surface sensitive spectroscopy to follow both the charge separation dynamics and interfacial conformation simultaneously. 2. The chemical physics of electrocatalysts is complicated and remain a challenge to study, because it happens right at the interfaces. Understanding the microscopic molecular properties at liquid/solid interfaces will be the key for designing new catalysts for better selectivity and lower overpotential. We are specialized in a new interface sensitive technique, called heterodyne 2D SFG spectroscopy, which are able to follow ultrafast dynamics at interfaces. We are interested in using it to determine molecular structure and dynamics of catalysts at liquid/solid interfaces, and transition dynamics in situ. 3. Many Interfaces of materials are heterogeneous. Thus, it would be powerful to visualize molecular conformations and dynamics without confusions from spatial ensemble averaging. We are interested in developing heterodyne SFG based microscopy to visualize heterogeneous interfaces, including MOFs, host-guest self-assemblies, and sea surface monolayers

近期论文

查看导师新发文章 （温馨提示：请注意重名现象，建议点开原文通过作者单位确认）

Li Y,Shrestha M,Luo M,Sit I,Song M,Grassian VH,Xiong W "Salting Up of Proteins at the Air/Water Interface.", Langmuir, 2019, Vol. 35, Issue 43, 13815-13820 [View] Nadler KA,Kim P,Huang DL,Xiong W,Continetti RE "Water diffusion measurements of single charged aerosols using H2O/D2O isotope exchange and Raman spectroscopy in an electrodynamic balance.", Phys Chem Chem Phys, 2019, Vol. 21, Issue 27, 15062-15071 [View] Porter TM,Wang J,Li Y,Xiang B,Salsman C,Miller JS,Xiong W,Kubiak CP "Direct observation of the intermediate in an ultrafast isomerization.", Chem Sci, 2019, Vol. 10, Issue 1, 113-117 [View] Wang H,Chen W,Wagner JC,Xiong W "Local Ordering of Lattice Self-Assembled SDS@2β-CD Materials and Adsorbed Water Revealed by Vibrational Sum Frequency Generation Microscope.", J Phys Chem B, 2019, Vol. 123, Issue 29, 6212-6221 [View] Xiang B,Ribeiro RF,Li Y,Dunkelberger AD,Simpkins BB,Yuen-Zhou J,Xiong W "Manipulating optical nonlinearities of molecular polaritons by delocalization.", Sci Adv, 2019, Vol. 5, Issue 9, eaax5196 [View] F Ribeiro R,Dunkelberger AD,Xiang B,Xiong W,Simpkins BS,Owrutsky JC,Yuen-Zhou J "Theory for Nonlinear Spectroscopy of Vibrational Polaritons.", J Phys Chem Lett, 2018, Vol. 9, Issue 13, 3766-3771 [View] Lauren E.Buchanan, WeiXiong "Two-Dimensional Infrared (2D IR) Spectroscopy", Encyclopedia of Modern Optics (Second Edition), 2018, Vol. 2, 164-183 Shrestha M,Luo M,Li Y,Xiang B,Xiong W,Grassian VH "Let there be light: stability of palmitic acid monolayers at the air/salt water interface in the presence and absence of simulated solar light and a photosensitizer.", Chem Sci, 2018, Vol. 9, Issue 26, 5716-5723 [View] Xiang B,Ribeiro RF,Dunkelberger AD,Wang J,Li Y,Simpkins BS,Owrutsky JC,Yuen-Zhou J,Xiong W "Two-dimensional infrared spectroscopy of vibrational polaritons.", Proc Natl Acad Sci U S A, 2018, Vol. 115, Issue 19, 4845-4850 [View] Haoyuan Wang, Tian Gao, and Wei Xiong "Self-Phase-Stabilized Heterodyne Vibrational Sum Frequency Generation Microscopy", ACS Photonics, 2017, Vol. 4, Issue 7, 1839 Xiang B,Li Y,Pham CH,Paesani F,Xiong W "Ultrafast direct electron transfer at organic semiconductor and metal interfaces.", Sci Adv, 2017, Vol. 3, Issue 11, e1701508 [View] Ellis JL,Hickstein DD,Xiong W,Dollar F,Palm BB,Keister KE,Dorney KM,Ding C,Fan T,Wilker MB,Schnitzenbaumer KJ,Dukovic G,Jimenez JL,Kapteyn HC,Murnane MM "Materials Properties and Solvated Electron Dynamics of Isolated Nanoparticles and Nanodroplets Probed with Ultrafast Extreme Ultraviolet Beams.", J Phys Chem Lett, 2016, Vol. 7, Issue 4, 609-15 [View] Yingmin Li, Jiaxi Wang, Melissa Clark, Clifford P. Kubiak, Wei Xiong "Characterizing interstate vibrational coherent dynamics of surface adsorbed catalysts by fourth-order 3D SFG spectroscopy", Chem. Phy. Lett., 2016, Vol. 650, Issue 16, 1 Zhiguo Li, Jiaxi Wang, Yingmin Li, and Wei Xiong "Solving the “Magic Angle” Challenge in Determining Molecular Orientation Heterogeneity at Interfaces", JPCC, 2016, Vol. 120, Issue 36, 20239 Jennifer L Ellis, Daniel D Hickstein, Kyle J Schnitzenbaumer, Molly B Wilker, Brett B Palm, Jose L Jimenez, Gordana Dukovic, Henry C Kapteyn, Margaret M Murnane, Wei Xiong "Solvents effects on charge transfer from quantum dots", JACS, 2015, Vol. 137, Issue 11, 3759-3762 Jiaxi Wang, Melissa L. Clark, Yingmin Li, Camille L. Kaslan, Clifford P. Kubiak, and Wei Xiong "Short-Range Catalyst–Surface Interactions Revealed by Heterodyne Two-Dimensional Sum Frequency Generation Spectroscopy", JPCL, 2015, Vol. 6, 4204-4209 Yingmin Li, Jiaxi Wang, and Wei Xiong "Probing Electronic Structures of Organic Semiconductors at Buried Interfaces by Electronic Sum Frequency Generation Spectroscopy", JPCC, 2015, Vol. 119, Issue 50, 28083 Ding C, Xiong W, Fan T, Hickstein DD, Popmintchev T, Zhang X, Walls M, Murnane MM, Kapteyn HC, "High flux coherent super-continuum soft X-ray source driven by a single-stage, 10mJ, Ti:sapphire amplifier-pumped OPA.", Opt Express, 2014, Vol. 22, Issue 5, 6194-202 [View] Hickstein DD, Dollar F, Ellis JL, Schnitzenbaumer KJ, Keister KE, Petrov GM, Ding C, Palm BB, Gaffney JA, Foord ME, Libby SB, Dukovic G, Jimenez JL, Kapteyn HC, Murnane MM, Xiong W. "Mapping nanoscale absorption of femtosecond laser pulses using plasma explosion imaging.", ACS Nano, 2014, Vol. 8, Issue 9, 8810-8818 [View] Hickstein DD, Dollar F, Gaffney JA, Foord ME, Petrov GM, Palm BB, Keister KE, Ellis JL, Ding C, Libby SB, Jimenez JL, Kapteyn HC, Murnane MM, Xiong W, "Observation and control of shock waves in individual nanoplasmas.", Phys Rev Lett, 2014, Vol. 112, Issue 11, 115004 [View] Xiong W, Hickstein DD, Schnitzenbaumer KJ, Ellis JL, Palm BB, Keister KE, Ding C, Miaja-Avila L, Dukovic G, Jimenez JL, Murnane MM, Kapteyn HC, "Photoelectron spectroscopy of CdSe nanocrystals in the gas phase: a direct measure of the evanescent electron wave function of quantum dots.", Nano Lett, 2013, Vol. 13, Issue 6, 2924-30 [View]