Xiong, Wei
Strong-coupling Chemistry and Dynamics; Interfacial Charge transfer; Molecular Structure and Dynamics of Self-Assembled Materials
Strong-coupling Chemistry and Dynamics; Interfacial Charge transfer; Molecular Structure and Dynamics of Self-Assembled Materials
Contact Information
Associate Professor of Chemistry and Biochemistry
Office: Pacific Hall B100C
Phone: 858-534-0270
Email: w2xiong@ucsd.edu
Web: ultrafast.ucsd.edu
Group: View group members
Office: Pacific Hall B100C
Phone: 858-534-0270
Email: w2xiong@ucsd.edu
Web: ultrafast.ucsd.edu
Group: View group members
Education
2011 Ph.D., University of Wisconsin, Madison
2006 B.S., Peking University
2011 Ph.D., University of Wisconsin, Madison
2006 B.S., Peking University
Appointments
2020 Associate Professor, UCSD
2014 Assistant Professor, UCSD
2011 Postdoc, University of Colorado, Boulder
2020 Associate Professor, UCSD
2014 Assistant Professor, UCSD
2011 Postdoc, University of Colorado, Boulder
Awards and Academic Honors
2020
Sloan Research Fellowship
2020
NIH Maximizing Investigator's Research Award (MIRA)
2019
NSF CAREER Award
2019
ACS JPC&PHYS Lectureship Award
2017
DARPA Director's Fellowship
2016
AFOSR Young Investigator Program Award (YIP)
2015
DARPA Young Faculty Award (YFA)
Research Interests
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
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
Primary Research Area
Physical/Analytical Chemistry
Physical/Analytical Chemistry
Interdisciplinary interests
Materials
Atmospheric and Environmental
Macromolecular Structure
Atmospheric and Environmental
Macromolecular Structure
Image Gallery
HD SFG Microscopy
CO2 surface catalysts probed by HD 2D SFG
HD SFG Microscopy
CO2 surface catalysts probed by HD 2D SFG
Selected Publications
- Wang H,Wagner JC,Chen W,Wang C,Xiong W "Spatially dependent H-bond dynamics at interfaces of water/biomimetic self-assembled lattice materials.", Proc Natl Acad Sci U S A, 2020, Vol. 117, Issue 38, 23385-23392 [View]
- Xiang B,Ribeiro RF,Du M,Chen L,Yang Z,Wang J,Yuen-Zhou J,Xiong W "Intermolecular vibrational energy transfer enabled by microcavity strong light-matter coupling.", Science, 2020, Vol. 368, Issue 6491, 665-667 [View]
- 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]
- 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]
- 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]
- 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
- 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
- Xiong W, Laaser JE, Mehlenbacher RD, Zanni MT, "Adding a dimension to the infrared spectra of interfaces using heterodyne detected 2D sum-frequency generation (HD 2D SFG) spectroscopy.", Proc Natl Acad Sci U S A, 2011, Vol. 108, Issue 52, 20902-7 [View]
- Xiong W, Laaser JE, Paoprasert P, Franking RA, Hamers RJ, Gopalan P, Zanni MT, "Transient 2D IR spectroscopy of charge injection in dye-sensitized nanocrystalline thin films.", J Am Chem Soc, 2009, Vol. 131, Issue 50, 18040-1 [View]