Wenxiang Chen EMAIL: [email protected] • HOMEPAGE: https://publish.illinois.edu/wxchen/ University of Illinois at Urbana-Champaign Education Doctor of Philosophy in Electrical and Systems Engineering 2011 − 2017 University of Pennsylvania Dissertation title: “Novel plasmonic materials, metasurfaces and their application in light manipulation and environmental sensing” Advisor: Prof. Cherie R. Kagan

Bachelor of Science in Applied Physics 2007 − 2011 University of Science and Technology of China

Research Experience Postdoctoral Research Associate 2017 − Present University of Illinois at Urbana-Champaign, Materials Science and Engineering Advisor: Prof. Qian Chen • Discover unique solid-solution structural phase transition pathway in the nanostructured cathodes for low-energy-barrier, high-performance energy storage devices. • Apply state-of-the-art scanning transmission electron microscopy (STEM) and liquid- phase TEM to cathode material characterization. • Collaborate and communicate with faculty, staff scientists, postdocs, and students across departments.

Graduate Research Assistant 2011 − 2017 University of Pennsylvania, Electrical and Systems Engineering Advisor: Prof. Cherie R. Kagan • Design, simulate, and fabricate nanostructures on soft substrates for strain-amplified, mechanically-tunable, ultrasensitive optical metasurfaces (leading to a patent). • Design, simulate, and fabricate nanostructures and their arrays for extreme bandwith quarter-wave plates and angle-independent plasmonic sensors. • Synthesize colloidal nanocrystals with well-controlled surface chemistry and interparticle interactions for strong optical absorbers.

International Undergraduate Exchange Program Summer 2010 Pohang University of Science and Technology, Department of Physics, Korea Advisor: Prof. Dong Eon Kim • Investigated two-color fields for the generation of isolated attosecond pulses in ultrafast physics.

Publications 1. Chen, W.; Zhan, X.; Yuan, R.; Zhang, C.; Stephens, R. M.; Yang, H; Zuo, J.-M.; Chen, Q. Effects of Insertion Rates on Cathode Structure in Mg2+ Ion Intercalation (working title), in preparation

Publications (continued) 2. Chen, W.; Zhan, X.; Yuan, R.; Zhang, C.; Ta, K.; An, H.; Pidaparthy, S.; Braun, P. V.; Stephens, R. M.; Gewirth, A. A.; Yang, H.; Zuo, J.-M.;* Chen, Q.* Atomic-Level Imaging of Chemo-Mechanically Coupled Islands and Archipelagos in Cathode Nanoparticles, to be submitted 3. Pidaparthy, S.; Liu, C.; Zhu, Q.; Tu, C.-Y.; Yao, L.; Chen, W.; Zhang, C.; Qian, J.; Stephens, R. M.; Yang,

H; Chen, Q.; Zuo, J.-M. Electrochemical Formation of Nanocrystalline Li2O2 and LiOH Phases in Li-O2 Battery in DMSO-based Electrolyte, to be submitted 4. Zhang, C.; Zhan, X.; Al-Zoubi, T.; Ma, Y.; Shih, P-C; Wang, F.; Chen, W.; Pidaparthy, S.; Stephens, R. M.; Chen, Q.; Zuo, J.-M.; Yang, H. Direct Microscopic Evidence of Intercalation of Mg2+ Ions into Birnessite MnO2 Nanoflowers, submitted 5. Liu, C.; Ou, Z.; Guo, F.; Luo, B.; Chen, W.; Qi, L.; Chen, Q. “Colloid-Atom Duality” in the Assembly Dynamics of Concave Gold Nanoarrows, JACS, just accepted, (2020) 6. Chen, W.; Zhan, X.; Luo, B.; Ou, Z.; Shih, P.-C.; Yao, L.; Pidaparthy, L.; Patra, A.; An, H.; Braun, P. V.; Stephens, R. M.; Yang, H; Zuo, J.-M.;* Chen, Q.* Effects of Particle Size on Mg2+ Ion Intercalation into λ- MnO2 Cathode Materials, Nano Lett. 19, 4712-4720 (2019) 7. An, H.; Smith, J. W.; Chen, W.; Ou, Z.; Chen, Q. Charting the quantitative relationship between two- dimensional morphology parameters of polyamide membranes and synthesis conditions, Mol. Syst. Des. Eng. 5, 102-109, (2020) 8. Song X.; Smith, J. W.; Kim, J.; Zaluzec, N. J.; Chen, W.; An, H.; Dennison, J. M.; Cahill, D. G.; Kulzick, M. A.; Chen, Q. Unraveling the Morphology–Function Relationships of Polyamide Membranes Using Quantitative Electron Tomography, ACS Appl. Mater. Interfaces, 11, 8517–8526 (2019)

9. Zhan, X.; Zuo, J.-M.; Chen, W.; Chen, Q. Determination of Mn Valences in Li1−xMgxMn2O4 Using Monochromated EELS in an Aberration-Corrected STEM, Microsc. Microanal. 25 (S2), 658-659, (2019).

10. Zhan, X.; Yuan, R.; Chen, W.; Chen, Q.; Zuo, J.-M. Determination of Crystallinity in Li1−xMgxMn2O4 Nanocrystals Based on Diffraction Patterns Correlation Analysis and Strain Mapping, Microsc. Microanal. 25 (S2), 1972-1973, (2019). 11. Chen, W.; Guo, J.; Zhao, Q.; Gopalan, P.; Fafarman, A. T.; Keller, A.; Zhang, M.; Wu, Y.; Murray, C. B.; Kagan, C. R. Designing Strong Optical Absorbers via Continuous Tuning of Interparticle Interaction in Colloidal Gold Nanocrystal Assemblies, ACS Nano 13, 7493-7501 (2019) 12. Chen, W.; Liu, W.; Jiang, Y.; Zhang, M.; Song, N.; Greybush, N. J.; Guo, J.; Estep, A. K.; Turner, K. T.; Agarwal, R.; Kagan, C. R. Ultrasensitive, Mechanically Responsive Optical Metasurfaces via Strain Amplification, ACS Nano 12, 10683-10692 (2018) 13. Chen, W.; Wu, G.; Zhang, M.; Greybush, N. J.; Howard-Jennings, J. P.; Song, N.; Stinner, F. S.; Yang, S.; Kagan, C. R. Angle-Independent Optical Moisture Sensors Based on Hydrogel-Coated Plasmonic Lattice Arrays Optical moisture sensor based on hydrogel-coated Plasmonic Lattice Array, ACS Appl. Nano Mater. 1, 1430-1437 (2018) 14. Zhang M.; Pacheco-Peña, V.; Yu, Y.; Chen, W.; Greybush, N. J.; Stein, A.; Engheta, N.; Murray, C. B.; Kagan, C. R. Nanoimprinted Chiral Plasmonic Substrates with Three-dimensional Nanostructures, Nano Lett. 18, 7389-7394 (2018) 15. Zhang, M.; Guo, J.; Yu, Y.; Wu, Y.; Yun, H.; Jishkariani, D.; Chen, W.; Greybush, N. J.; Kübel, C.; Stein, A.; Murray, C. B.; Kagan, C. R. 3D Nanofabrication via Chemo‐Mechanical Transformation of Nanocrystal/Bulk Heterostructures, Adv. Mater. 30, 1800233 (2018) 16. Zhao, Q.; Zhao, T.; Guo, J.; Chen, W.; Zhang, M.; Kagan, C. R. The Effect of Dielectric Environment on Doping Efficiency in Colloidal PbSe Nanostructures, ACS Nano 12, 1313-1320 (2018)

Publications (continued) 17. Zhang, M.; Magangnosc, D. J.; Liberal, I.; Yu, Y.; Yun, H.; Yang, H.; Wu, Y.; Guo, J.; Chen, W.; Shin, Y. J.; Stein, A.; Kikkawa, J. M.; Engheta, N.; Gianola, D. S.; Murray, C. B.; Kagan, C. R. High-strength magnetically-switchable plasmonic nanorods assembled from a binary nanocrystal mixture, Nat. Nanotechnol. 12, 228-232 (2017) 18. Chen, W.; Tymchenko, M.; Gopalan, P.; Ye, X.; Wu, Y.; Zhang, M.; Murray, C. B.; Alu, A.; Kagan, C. R. Large-Area Nanoimprinted Colloidal Au Nanocrystal-Based Nanoantennas for Ultrathin Polarizing Plasmonic Metasurfaces, Nano Lett. 15, 5254-5260 (2015) 19. Chen, W.; Chen, G.; Kim, D. E. Two-color field for the generation of an isolated attosecond pulse in water-window region, Opt.l Express 19, 20610-20615 (2011)

Patent

1. Microstructures To Amplify Strain For Flexible Devices (US Patent Application, 62/904, 784, (2019)) Inventors: Kagan, C. R., Turner, K. T.; Chen, W.; Jiang, Y.

Book Chapters (Invited)

1. Zhou, S., Chen, W., Chen, Q., invited (2020), in the book of “Self-Assembly of Plasmonic Nanostructures” by World Scientific Publishing Company.

Review Experience (Journal Referee) • Advanced Materials, Nano Letters, ACS Nano, ACS Photonics

Teaching and Mentoring Graduate Mentor 2018 − present University of Illinois at Urbana-Champaign, Materials Science and Engineering • Successful completion of the Illinois Mentoring Certificate Program. • Mentor one graduate student on the preparation of transitional metal oxide cathode materials for rechargeable multivalent batteries and the electrochemical tests. • Mentor one high school student from the World Wide Youth in Science and Engineering Program (High School Summer STEM Research Programs) on the study of electrode materials for energy storage devices.

Graduate Mentor 2012 − 2015 University of Pennsylvania, Electrical and Systems Engineering • Mentored two graduate students on the nanofabrication of optical metasurfaces and the characterizations. Designed experiments for the graduate students and guided the students in data analysis. They are now Ph.D. candidates at the University of Utah and the University of Pennsylvania, respectively. • Mentored one undergraduate from Summer Undergraduate Fellowship in Sensor Technologies (SUNFEST) program. Guided the student in the tests of plasmonic humidity sensors and data analysis.

Teaching Assistant 2012 − 2013 University of Pennsylvania, Electrical and Systems Engineering • Nanoscale Science and Engineering • Semiconductor Device Physics and Technology Teaching and Mentoring • Electromagnetics and Optics Theory • Guided students on course assignments and discussion sections to keep students on track.

Conferences Presentations Oral Presentations • Chen, W. (2019, Apr.) “Effects of Nanoparticle Size on Mg2+ intercalation into the Cathode Materials”, Material Research Society (MRS) Spring Meeting & Exhibit, Phoenix, AZ. • Chen, W. (2016, Sept.) “Hydrogel Au Nanorod Optical Humidity Sensor for Agriculture Use”, Electrical and Systems Engineering Ph.D. Colloquium, University of Pennsylvania, Philadelphia, PA. • Chen, W. (2015, Nov.) “Plasmonic Optical Devices Built on Gold Nanocrystals”, Electrical and Systems Engineering Ph.D. Colloquium, University of Pennsylvania, Philadelphia, PA.

Poster Presentations • Chen, W.; Zhan, X.; Yang, H.; Zuo, J.-M.; Chen, Q. (2018, Sept.) “Size Matters for Mg2+ Intercalation into Cathode Materials” Energy Biosciences Institute retreat, Berkley, CA. • Hong, S.-H.; Fafarman, A. T.; Caglayan, H.; Ye, X.; Paik, T.; Chen, W.; Engheta, N.; Murray, C. B.; Kagan, C. R. (2013, Apr.) “Chemically Tailored Dielectric-to-Metal Transition for the Design of Metamaterials from Nanoimprinted Colloidal nanocrystals” MRS Spring Meeting & Exhibit, San Francisco, CA

Lab Skills Nanofabrication Electron beam lithography, nanoimprint lithography, sputtering, dry etching (SiO2, Si), wet etching (Au, Cr), physical vapor deposition, plasma-enhanced chemical vapor deposition. Chemistry Colloidal Au nanocrystal synthesis, ligand exchange, hydrogel precursor synthesis, sol-gel synthesis. Electrochemistry Cyclic voltammetry, potentiometry, electrochemical impedance spectroscopy, Swagelok cell assembly and test Electron Microscopy and Nanoscale Characterization TEM, liquid-phase TEM, scanning electron microscopy, atomic force microscopy Optical / X-ray Spectroscopy UV-Vis spectroscopy, Fourier-transform infrared spectroscopy, and dark-field/oil immersion optical spectroscopies, ellipsometry, X-ray diffraction spectroscopy Simulation Lumerical FDTD Solutions Software / Computer Skills MATLAB, 3ds-Max, TEM Imaging & Analysis, Gatan Microscopy Suite Software, ImageJ Maintenance Maintained the physical vapor deposition tool (AMOD, Angstrom Engineering) for 5 years.