Biography
Toshihiro Aoki, Ph.D., is a Project Scientist and TEM Leader at the Center for Transmission Electron Microscopy within the Irvine Materials Research Institute at the University of California, Irvine. Aoki oversees operations, applications, user training, and maintenance of S/TEM instruments, including the Nion UltraSTEM 200 HERMES and JEOL Grand ARM300CF double-corrected microscopes. His research focuses on materials characterization using aberration-corrected S/TEM, EELS, EDS, and 4D-STEM, with applications to functional oxides, high entropy materials, 2D materials, and vibrational spectroscopy in electron microscopes. He has authored and co-authored over 98 peer-reviewed articles in journals including Nature, Nature family journals, Science, Physical Review Letters, Nano Letters, Advanced Materials, Energy & Environmental Science, and Chemistry of Materials.
Before joining UC Irvine in 2016, Aoki spent eight years at JEOL USA, Inc. as an Applications Specialist, where he completed more than 40 field emission TEM/STEM acceptance tests and provided training on aberration-corrected electron microscopy to customers across North and Central America. He subsequently served as Principal Engineer and Assistant Research Engineer at the LeRoy Eyring Center for Solid State Science at Arizona State University, where he was recruited to establish operational capabilities for newly installed aberration-corrected microscopes and build collaborative research programs. This combination of industry experience and academic research has given him expertise in rapid alignment of electron optics, user training, maintenance, and troubleshooting.
Aoki earned his Ph.D. in Science and Engineering of Materials from Arizona State University. He received a Microscopy and Microanalysis Professional Technical Staff Award in 2023 from Microscopy Society of America and has served as a review panel member for the Center for Functional Nanomaterials user facilities at Brookhaven National Laboratory from 2013-2015. He has been an invited speaker at Microscopy and Microanalysis conferences and served as a symposium organizer for the 2021 M&M meeting.
Return to topEducation
- Ph.D. in Science and Engineering of Materials, Arizona State University, 2003
- M.Eng. in Materials Science, Kumamoto University, 2000
- B.Eng. in Materials Science, Kumamoto University, 1998
Distinctions
- Professional Technical Staff Award, Microscopy and Microanalysis, 2023
- Poster Award 1st Place, EDGE 2013 Meeting, 2013
- MSA Poster Award 1st Place, Microscopy and Microanalysis, 2005
- Young Scientist Award, Japan Institute of Metals, 1998
- Outstanding Student Paper Award, Workshop on the Physics and Chemistry of II-VI Materials, 2002
Areas of Expertise
- Electron Microscopy Characterization
- Aberration-Corrected STEM Imaging
- Vibrational Spectroscopy
- Atomic-Resolution EELS Mapping
- Four-Dimensional STEM
- Functional Oxide Interfaces
- Nanomaterial Phonon Dynamics
Recent Publications
- Kaitlyn G Dold,, Joni Spencer, Griffin M Milligan, Sirisak Singsen, Zhe Wang, Marcus Marracci, Dmitri Leo Mesoza Cordova, Thanh N Huynh, Kaleolani Ogura, Toshihiro Aoki, Xingxu Yan, Dmitry A Fishman, Xiaoqing Pan, Ruqian Wu, Elizabeth MY Lee, Maxx Q Arguilla, “Dimensionally resolved nanostructures of an atomically precise and optically active 1D van der Waals helix” (opens in new tab), Advanced Materials, vol. 38, no. 8, pp. e10230, 2026.
- Suixuan Li, Chuanjin Su, Zihao Qin, Ahmet Alatas, Martin Kun, Takahiro Yamada, Shelly D Kelly, Mary H Upton, Anthony Gironda, Jiyong Zhao, Bora Kalkan, Wanli Yang, Toshihiro Aoki, Yongjie Hu, “Metallic θ-phase tantalum nitride has a thermal conductivity triple that of copper” (opens in new tab), Science, vol. 391, no. 6786, pp. 707, 2026.
- Xingxu Yan, Paul M Zeiger, Yifeng Huang, Haoying Sun, Jie Li, Chaitanya A Gadre, Hongbin Yang, Ri He, Toshihiro Aoki, Zhicheng Zhong, Yuefeng Nie, Ruqian Wu, Ján Rusz, Xiaoqing Pan, “Atomic-scale imaging of frequency-dependent phonon anisotropy” (opens in new tab), Nature, vol. 645, pp. 893–899, 2025.
- Griffin M Milligan, Sirisak Singsen, Sydney To, Toshihiro Aoki, Brian Y Zhi, Cameron J Collins, Kaleolani S Ogura, Elizabeth MY Lee, Maxx Q Arguilla, “Precision Synthesis of a Single Chain Polymorph of a 2D Solid within Single-Walled Carbon Nanotubes”, Advanced Materials, vol. 38, no. 28, pp. 2502213, 2025.
- Christopher Earl Carlton, Fátima Zorro, Maria José Caturla, Toshihiro Aoki, Yimei Zhu, Jonathan Amodeo, Paulo Jorge Ferreira, “Nanocompression of 20 nm Silver Nanoparticles: In situ Aberration-Corrected TEM and Atomistic Simulations” (opens in new tab), Small, vol. 21, no. 4, pp. 2405292, 2025.
- Hongbin Yang, Yinong Zhou, Guangyao Miao, Ján Rusz, Xingxu Yan, Francisco Guzman, Xiaofeng Xu, Xianghan Xu, Toshihiro Aoki, Paul Zeiger, Xuetao Zhu, Weihua Wang, Jiandong Guo, Ruqian Wu, Xiaoqing Pan, “Phonon modes and electron–phonon coupling at the FeSe/SrTiO₃ interface” (opens in new tab), Nature, vol. 635, pp. 332–336, 2024.
- Dmitri Leo Mesoza Cordova, Kenneth Chua, Tyler A Kerr, Toshihiro Aoki, David Knez, Grigorii Skorupskii, Diana Lopez, Joseph Ziller, Dmitry A Fishman, Maxx Q Arguilla, “Atomically precise inorganic helices with a programmable irrational twist” (opens in new tab), Nature Materials, vol. 23, pp. 1347–1354, 2024.
- Kaleolani S Ogura, Dmitri Leo Mesoza Cordova, Toshihiro Aoki, Griffin M Milligan, Ze-Fan Yao, Maxx Q Arguilla, “Functionalization and Structural Evolution of Conducting Quasi-One-Dimensional Chevrel-Type Telluride Nanocrystals” (opens in new tab), Chemistry of Materials, vol. 36, no. 9, pp. 4714-4725, 2024.
- David C Beaudry, Michael J Waters, Gianna M Valentino, Daniel L Foley, Elaf Anber, Yevgeny Rakita, Charlie J Brandenburg, Jean-Philippe Couzinié, Loïc Perrière, Toshihiro Aoki, Keith E Knipling, Patrick G Callahan, Benjamin WY Redemann, Tyrel M McQueen, Elizabeth J Opila, James M Rondinelli, Mitra L Taheri, “Exceptional hardness in multiprincipal element alloys via hierarchical oxygen heterogeneities” (opens in new tab), Science Advanced, vol. 10, pp. eado9697, 2024.
- Huiming Guo, Hasti Vahidi, Hyojoo Kang, Soham Shah, Mingjie Xu, Toshihiro Aoki, Timothy J Rupert, Jian Luo, Kandis Leslie Gilliard-AbdulAziz, William J Bowman, “Tuning grain boundary cation segregation with oxygen deficiency and atomic structure in a perovskite compositionally complex oxide thin film” (opens in new tab), Appl. Phys. Lett., vol. 124, pp. 171605, 2024.
- Steven Allison, Dmitri Leo Mesoza Cordova, Maham Hasib, Toshihiro Aoki, Maxx Arguilla, “Nanoparticle-directed bimodal crystallization of the quasi-1D van der Waals phase, Bi₄I₄” (opens in new tab), Chem. Sci., vol. 15, pp. 4811-4823, 2024.
Contact Information
Website: https://imri.uci.edu/people/taoki/
Email: toshihia@uci.edu
Phone: (978) 979-7306
Address: 1150 Engineering Hall
Return to topThis profile was created with the help of AI.
Last updated on 5/28/2026.