Sumio Iijima

Sumio Iijima was a Japanese physicist and materials scientist best known for reporting the discovery of carbon nanotubes, a finding that catalyzed the field of nanotechnology and influenced research across condensed matter physics, chemistry, and engineering. His 1991 paper brought attention to tubular carbon structures and stimulated experimental and theoretical work in physics, chemistry, and materials science by researchers at institutions such as IBM, University of Tokyo, and MIT. Iijima's career connected industrial research at NEC with academic appointments and international collaborations involving laboratories in Japan, the United States, and Europe.

Early life and education

Iijima was born in Saitama Prefecture, Japan, and completed his early studies in science before enrolling at the University of Tokyo, where he obtained degrees in physics and engineering, aligning with contemporaries from institutions like Keio University, Kyoto University, and Tohoku University. During his formative years he trained in electron microscopy techniques that were prominent at research centers such as Bell Labs, Rutherford Appleton Laboratory, and Max Planck Institute laboratories, and studied instrumentation related to scanning probe microscopy pioneered at IBM Zurich Research Laboratory and Hitachi. His mentors and collaborators included scientists linked to Mitsubishi Heavy Industries and research programs connected to the Japan Ministry of Education, Culture, Sports, Science and Technology.

Career and research

Iijima began his professional career in industrial research at NEC where he led groups using transmission electron microscopy and high-resolution electron microscopy, engaging with parallel efforts at Sony Corporation, Canon Inc., and Toshiba. He published extensively in journals such as Nature (journal), Science (journal), and Physical Review Letters, and collaborated with theorists and experimentalists from Columbia University, Harvard University, Stanford University, University of Cambridge, and ETH Zurich. His research touched on carbon allotropes studied by researchers at University of Oxford and Pennsylvania State University, and on catalysis work relevant to teams at Argonne National Laboratory and Lawrence Berkeley National Laboratory. Iijima participated in conferences organized by societies like the American Physical Society, Materials Research Society, and Institute of Electrical and Electronics Engineers, and his laboratory technology intersected with companies such as Mitsubishi Electric and Sumitomo Electric.

Discovery of carbon nanotubes

In 1991 Iijima reported observing multi-walled carbon nanotubes using high-resolution transmission electron microscopy, connecting his findings to earlier work on fullerenes by researchers at Rice University and University of Sussex, and to synthesis techniques developed at University of California, Berkeley and University of Arizona. The observation spun off intense activity from groups at Cornell University, University of Chicago, Princeton University, and University of Pennsylvania who explored synthesis methods including arc discharge, laser ablation, and chemical vapor deposition similar to approaches used at Lawrence Livermore National Laboratory. The discovery led to studies of electronic properties examined by theorists at Tokyo Institute of Technology and California Institute of Technology, and to applications pursued by teams at NASA, European Space Agency, and industrial laboratories such as DuPont and BASF. Subsequent experimental work by researchers at Seoul National University and Peking University extended the original observations to single-walled nanotubes and to hybrid materials integrating graphene advances attributed to groups at University of Manchester and Columbia University.

Awards and honors

Iijima received numerous recognitions including the Japan Prize, the Welch Prize in Chemistry, election as a Fellow of the Royal Society, and awards from organizations such as the American Physical Society, the Materials Research Society, and the Institute of Electrical and Electronics Engineers. He was honored with distinctions from universities and academies including the American Academy of Arts and Sciences, the Japan Academy, Tohoku University, and Osaka University, and received honorary degrees from institutions like Uppsala University and EPFL. Industrial and governmental awards included accolades from NEC, the Ministry of Education, Culture, Sports, Science and Technology (Japan), and recognitions at international meetings hosted by UNESCO and the World Economic Forum.

Personal life and legacy

Iijima's personal connections spanned collaborations with scholars in Japan, United Kingdom, United States, China, South Korea, and Germany, and his mentorship influenced generations of scientists working at Riken, JAXA, NEDO, and university laboratories worldwide. His legacy is reflected in technologies developed by startups and corporations such as Samsung, LG, Toyota, and Bosch, and in academic programs at National University of Singapore and University of California system. Posthumous discussions of his impact have appeared in tributes from institutions like Nature (journal), Science (journal), and the Royal Society.

Category:Japanese physicists Category:Materials scientists Category:1939 births Category:2019 deaths