Dr. Nan Yao is the founding director of Princeton's preeminent Imaging and Analysis Center. He is a Senior Research Scholar and a Lecturer with the Rank of Professor in the Princeton Institute for the Science and Technology of Materials, and a Faculty Fellow of Whitman College. As a teacher, Yao is a ten-time recipient of the Excellence in Teaching Award and Commendation for Outstanding Teaching from the Princeton Engineering Council and the School of Engineering & Applied Science at Princeton University, where he has taught more than 3600 students, postdocs, and faculty researchers. As a researcher, Yao's contributions include the co-discovery of the first natural quasicrystal, a finding that has revolutionized the science of natural crystal chemistry by identifying the third form of solid in nature besides crystalline and non-crystalline. Yao is committed to pushing the boundaries of science and engineering to benefit academia, industry and society in myriad ways.

Yao is a fellow of the Microscopy Society of America and the American Association for the Advancement of Science. He is among the top 25 most cited Google Scholars in the field of Electron Microscopy in both the physical and life sciences disciplines (2017-19). He was also recognized for authoring among the top 100 most read Nature Scientific Reports articles in 2015 (out of ~11,000 papers). Yao's research has focused on utilizing advanced imaging, diffraction, spectroscopy and in-situ techniques, in tandem with computer simulation, to conduct fundamental studies of the structure-composition-processing-property relationships in complex materials for applications in nanotechnology, energy, environment and health. Yao has published two books entitled Handbook of Microscopy for Nanotechnology (Kluwer/Springer Publishers 2005, Chinese edition: Tsinghua University Press 2006, Russian edition: Springer Publishers 2011) and Focused Ion Beam System: Basics and Applications (Cambridge University Press, 2007). He has also authored 18 book chapters and more than 250 research publications in scientific journals, including Science, Nature, and many others. Yao is respected for many contributions to the field including his pioneer work in developing the first 300 keV Environmental-cell Transmission Electron Microscope (1991) and developing a theoretical explanation for the superior imaging resolution of scanning helium-ion microscopy over the scanning electron microscopy (2008).

Yao collaborates with scholars on interdisciplinary research. After searching for more than a decade, in cooperation with L. Bindi, P. J. Steinhardt and P. Lu, Yao obtained the first conclusive evidence of crystallographically forbidden icosahedral symmetry in a naturally occurring phase that led the discovery of natural quasicrystal [Science 324 (5932), 1306 (2009)]. This extraordinary breakthrough was cited in the Nobel Prize in Chemistry 2011 press release. Furthermore, in recognition of their achievement, Yao's co-discoverer, Bindi was awarded the "2015 Presidente della Repubblica Prize", the highest national scientific award in Italy. In 2015, Yao's transmission electron microscopy results again provided conclusive evidence for the discovery of the second quasicrystal of any kind found in nature, a novel natural quasicrystal with decagonal symmetry [Scientific Reports 5 9111 (2015)]. The discovery of the natural quasicrystals opens a new chapter in the study of mineralogy, forever redefining the conventional classification of mineral forms established in the 19th century. This discovery also opens a new way of longitudinally studying metal alloy stability in pressure and temperature conditions not accessible in the laboratory. These discoveries, which came from the study of meteorite samples that formed about 4.5 billion years ago, could answer basic questions about how materials were formed in our universe. In 2010, Yao's work with A. Maloof, et al. resulted in discovering a 650 million-year-old sponge-like organism. The shell-like fossils represent the earliest evidence of such animal forms in the current fossil record. The finding means animals appeared on Earth about 100 million years earlier than first thought, a significant contribution to the study of the development of Earth [Nature Geoscience 3 (9), 653 (2010)]. Together with D. Norris, Yao was invited to publish the opening paper in Nano Letters' inaugural issue [Nano Letters 1 (1), 3 (2001)]. With P. Lu and P. Chaikin, Yao's microscopy work also helped identify the earliest known use of diamond in 4000 BC [Archaeometry. 47, 1 (2005)]. In 2018, Yao organized the inaugural Princeton - Nature Conference, in partner with the scientific publisher - Nature, entitled "Frontiers in Electron Microscopy for the Physical and Life Sciences", which is for the first time brings together scientists from both the physical and the life sciences to explore the new horizons of research now becoming available through electron microscopy.

Yao's primary directive is devoted to teaching in academia, industry, and beyond. He created and directs a teaching curriculum in materials characterization at Princeton. In addition to regular for-credit classes, Yao has also developed an outreach program through short courses and workshops in materials science, which are offered monthly to students from other universities and to industrial scientists, all free of charge. More than 3600 undergraduate and graduate students, postdocs, and faculty researchers have enjoyed their learning experience in Dr. Yao's classroom at Princeton. Yao has been a high school mentor in the Partners in Science program of New Jersey Liberty Science Center since 2001. He received the Outstanding Service Award in Preparing Science and Technology Leaders for the Future from the Siemens Foundation in 2011. The students he mentored have won many national and international awards including Fannie and John Hertz Foundation Fellowship, Barry M. Goldwater National Scholarship, Fulbright Scholarship, Rhodes Scholarship, AFCEA National Grand Prize for Science, National Science Foundation Fellowship, National Defense Science and Engineering Fellowship, Materials Research Society Student Award, Microbeam Analysis Society Distinguished Scholar Award, Microscopy Society of America Undergraduate Research Award, Lawrence Fellowship, Forbes' 30 Under 30, and French Innovators Under 35, etc.

After receiving a Ph.D. in applied physics and electron microscopy from Arizona State University where John M. Cowley was his dissertation advisor, Yao entered industry, first working at the Shell Development Company, then at the ExxonMobil Research and Engineering Company. He joined Princeton University in 1993 to help build an interdisciplinary imaging and analysis program, which has since become a world-leading materials characterization center at Princeton. In 2003, Yao accepted a continuing appointment from the Dean of the Faculty as a Senior Research Scholar (rank of full Professor) at Princeton University.

PrincetonPrinceton University
Princeton, New Jersey
Zip: 08544
United States of America

IACPRISM Imaging and Analysis Center
Andlinger Center, Room 033
86 Olden Street
Phone: 609-258-6394
Email: nyao@princeton.edu