Hideki Shirakawa

Hideki Shirakawa
日本学士院 · CC BY 4.0 · source
Name	Hideki Shirakawa
Birth date	1936-08-20
Birth place	Hiratsuka, Kanagawa
Nationality	Japan
Fields	Chemistry, Physics
Institutions	University of Tokyo, Tokyo Institute of Technology, University of Tsukuba
Alma mater	Tokyo Institute of Technology
Known for	Conducting polymers, polyacetylene
Awards	Nobel Prize in Chemistry, Japan Prize, Order of Culture

Hideki Shirakawa is a Japanese chemist noted for pioneering the discovery that certain organic polymers can exhibit metallic conductivity, a breakthrough that gave rise to the field of conducting polymers and organic electronics. His work on doped polyacetylene alongside collaborators transformed understanding in polymer chemistry, influenced research at institutions such as Bell Labs, IBM, and MIT, and contributed directly to honors including the Nobel Prize in Chemistry. Shirakawa's career spans academic posts, industrial research, and engagement with scientific policy in Japan and internationally.

Early life and education

Shirakawa was born in Hiratsuka, Kanagawa and educated at the Tokyo Institute of Technology, where he completed degrees under mentors tied to traditions stemming from Osaka University and connections with laboratories influenced by work at University of Tokyo and Kyoto University. During his student years he encountered research cultures related to Sumitomo Chemical, Mitsubishi Chemical, and the postwar redevelopment of Japanese industry, interacting indirectly with scientists from Tohoku University and Nagoya University. His formative training included exposure to laboratories that had links to research at Imperial Chemical Industries and exchanges with visiting scholars from University of Cambridge and California Institute of Technology.

Research and career

Shirakawa's early career bridged industrial research and academia, with positions at institutions including the University of Tsukuba and collaborations with researchers connected to Tokyo Institute of Technology and Keio University. His network encompassed scientists from Bell Labs, IBM Research, DuPont, Hoechst and university groups at Stanford University, Princeton University, Harvard University, Columbia University, and Yale University. Funding and institutional interactions involved organizations like Japan Science and Technology Agency, Riken, Japan Society for the Promotion of Science, and corporate laboratories such as Toshiba, Hitachi, Sony, and Panasonic. His career engaged cross-disciplinary dialogues with researchers at Massachusetts Institute of Technology, ETH Zurich, Max Planck Society, CNRS, and University of Oxford on topics spanning solid-state chemistry and materials science.

Discovery of conducting polymers

In the early 1970s Shirakawa, working with collaborators whose networks included figures from University of Pennsylvania, University of California, Berkeley, and Imperial College London, investigated polyacetylene prepared via a unique platinum-catalyzed polymerization inspired by methods from Wacker process style catalysis and earlier work at Sumitomo Group laboratories. The resulting polyacetylene films displayed unexpected electrical behavior when chemically oxidized using reagents akin to those used in studies at Bell Labs and DuPont. This finding intersected with contemporaneous theoretical frameworks developed at Cornell University, University of Illinois Urbana-Champaign, and Princeton University concerning one-dimensional conductors and soliton models originated in work related to Anderson localization and Peierls transition. Subsequent doping experiments, paralleling approaches at Royal Society-linked groups and Institute of Physics laboratories, produced conductivities that rivaled inorganic semiconductors investigated at Intel and Fairchild Semiconductor, drawing attention from researchers at Samsung Electronics and LG Electronics.

Nobel Prize and awards

The 2000 Nobel Prize in Chemistry was awarded jointly to Shirakawa, Alan Heeger, and Alan G. MacDiarmid for "the discovery and development of conductive polymers," recognizing contributions that linked Shirakawa's experimental breakthroughs with theoretical and synthetic advances from collaborators and groups at University of Pennsylvania, University of California, Santa Barbara, Pennsylvania State University, and University of Cambridge. The prize complemented other honors including the Japan Prize, the Order of Culture from Japan, and recognition from societies such as the American Chemical Society, Royal Society of Chemistry, Material Research Society, and Electrochemical Society. His award ceremonies and lectures brought him into contact with leaders from UNESCO, OECD, World Economic Forum, and national academies like the Japan Academy and National Academy of Sciences.

Major publications and patents

Shirakawa authored and coauthored influential papers published in venues associated with Nature, Science, Physical Review Letters, Journal of the American Chemical Society, and Angewandte Chemie International Edition, collaborating with scientists connected to MIT, Harvard University, University of Tokyo, and University of Cambridge. His publications addressed synthesis methods related to catalytic systems with conceptual lineage to Fischer–Tropsch process catalysis and polymer characterization techniques used widely at Argonne National Laboratory, Brookhaven National Laboratory, and Lawrence Berkeley National Laboratory. Shirakawa's patents, filed in cooperation with entities comparable to Mitsubishi Heavy Industries, Sumitomo Chemical, and multinational patent offices in United States Patent and Trademark Office, European Patent Office, and Japanese Patent Office, covered conductive polymer formulations and processing relevant to applications by Sony, Sharp Corporation, Nissan, and Canon.

Later work and legacy

In later decades Shirakawa engaged in mentorship and advisory roles interacting with institutions such as University of Tokyo, Tohoku University, Kyoto University, and international centers including Max Planck Institute for Polymer Research and Bell Labs alumni networks. His influence is evident in fields pursued at Hitachi, Panasonic, Samsung, and start-ups in Silicon Valley and Shenzhen focused on organic electronics, flexible displays, and organic photovoltaics, linking to developments at E Ink Corporation, Konica Minolta, and BASF. Shirakawa's legacy persists in curricula at Tokyo Institute of Technology and international programs at ETH Zurich, Imperial College London, Massachusetts Institute of Technology, and shapes contemporary research agendas at laboratories within Riken, CNRS, Max Planck Society, and National Institute for Materials Science. His work continues to be cited in studies related to organic semiconductor devices, polymer solar cells, organic light-emitting diodes, and conductive polymer composites used by companies such as Toyota and Microsoft.

Category:Japanese chemists Category:Nobel laureates in Chemistry Category:1936 births Category:Living people