MacDiarmid, Alan G.

born April 14, 1927, Masterson, N.Z.

U.S. chemist.

He earned Ph.D.'s in chemistry at the University of Wisconsin at Madison (1953) and the University of Cambridge (1955). He then began teaching at the University of Pennsylvania, becoming Blanchard Professor of Chemistry there in 1988. With Alan J. Heeger and Shirakawa Hideki, he demonstrated that certain plastics can be chemically altered to be almost as conductive as metals. The discovery led scientists to uncover other conductive polymers, which contributed to the growing field of molecular electronics. In 2000 he received the Nobel Prize for Chemistry with Heeger and Shirakawa.

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▪ American chemist
born April 14, 1927, Masterson, N.Z.
died Feb. 7, 2007, Drexel Hill, Pa., U.S.

      New Zealand-born American chemist who, with Alan J. Heeger (Heeger, Alan J.) and Shirakawa Hideki, was awarded the Nobel Prize for Chemistry in 2000 for their discovery that certain plastics can be chemically modified to conduct electricity almost as readily as metals.

      MacDiarmid earned Ph.D.'s in chemistry at the University of Wisconsin at Madison (1953) and the University of Cambridge (1955). He then joined the faculty of the University of Pennsylvania, becoming full professor in 1964 and Blanchard Professor of Chemistry in 1988.

      During a visit to Japan in the mid-1970s, MacDiarmid met Shirakawa, who reported that he and his colleagues had synthesized polyacetylene, a polymer that was known to exist as a black powder, into a metallic-looking material that still behaved as an insulator. In 1977 the two men and Heeger, collaborating at the University of Pennsylvania, decided to introduce impurities into the polymer much as in the doping process used to tailor the conductive properties of semiconductors. Doping with iodine increased polyacetylene's electrical conductivity by a factor of 10 million, which made it as conductive as some metals. The discovery led scientists to uncover other conductive polymers. These polymers contributed to the emerging field of molecular electronics and were predicted to find application in computers.

      MacDiarmid held some 20 patents and was the recipient of numerous awards. In 2001 he was made a member of the Order of New Zealand, the country's highest honour.

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Universalium. 2010.

Look at other dictionaries:

  • MacDiarmid, Alan G. — (n. 14 abr. 1927, Masterson, Nueva Zelanda). Químico estadounidense. Obtuvo doctorados (Ph.D.) en química en la Universidad de Wisconsin en Madison (1953) y en la Universidad de Cambridge (1955). A continuación, comenzó la carrera docente en la… …   Enciclopedia Universal

  • MacDiarmid, Alan Graham — ▪ 2008       New Zealand born American chemist born April 14, 1927 , Masterton, N.Z. died Feb. 7, 2007 , Drexel Hill, Pa. was awarded the Nobel Prize for Chemistry in 2000 (together with Alan J. Heeger and Hideki Shirakawa) for the discovery that …   Universalium

  • Chemienobelpreis 2000: Alan MacDiarmid — Alan Heeger — Hideki Shirakawa —   97489   Die amerikanischen Wissenschaftler Heeger und MacDiarmid und der Japaner Shirakawa erhielten den Nobelpreis »für die Entdeckung und die Entwicklung von leitenden Polymeren«.    Biografien   Alan G. MacDiarmid, * Masterton (Neuseeland)… …   Universal-Lexikon

  • Alan G. MacDiarmid — Alan Graham MacDiarmid (Alan G. MacDiarmid) (* 14. April 1927 in Masterton, Neuseeland; † 7. Februar 2007 in Philadelphia) war ein neuseeländischer Chemiker. Zusammen mit Alan J. Heeger und Hideki Shirakawa erhielt er im Jahr 2000 den… …   Deutsch Wikipedia

  • Alan MacDiarmid — Alan Graham MacDiarmid (Alan G. MacDiarmid) (* 14. April 1927 in Masterton, Neuseeland; † 7. Februar 2007 in Philadelphia) war ein neuseeländischer Chemiker. Zusammen mit Alan J. Heeger und Hideki Shirakawa erhielt er im Jahr 2000 den… …   Deutsch Wikipedia

  • Alan G. MacDiarmid — Alan MacDiarmid Alan Graham MacDiarmid (né le 14 avril 1927 à Masterton (Nouvelle Zélande et mort le 7 février 2007 à Philadelphie (États Unis)) est un chimiste néo zélandais et ancien professeur à l université de Pennsylvanie. Il obtient le prix …   Wikipédia en Français

  • Alan G MacDiarmid — Alan MacDiarmid Alan Graham MacDiarmid (né le 14 avril 1927 à Masterton (Nouvelle Zélande et mort le 7 février 2007 à Philadelphie (États Unis)) est un chimiste néo zélandais et ancien professeur à l université de Pennsylvanie. Il obtient le prix …   Wikipédia en Français

  • Alan Graham MacDiarmid — Alan MacDiarmid Alan Graham MacDiarmid (né le 14 avril 1927 à Masterton (Nouvelle Zélande et mort le 7 février 2007 à Philadelphie (États Unis)) est un chimiste néo zélandais et ancien professeur à l université de Pennsylvanie. Il obtient le prix …   Wikipédia en Français

  • Alan Macdiarmid — Alan Graham MacDiarmid (né le 14 avril 1927 à Masterton (Nouvelle Zélande et mort le 7 février 2007 à Philadelphie (États Unis)) est un chimiste néo zélandais et ancien professeur à l université de Pennsylvanie. Il obtient le prix Nobel de Chimie …   Wikipédia en Français

  • Alan Mac Diarmid — Alan MacDiarmid Alan Graham MacDiarmid (né le 14 avril 1927 à Masterton (Nouvelle Zélande et mort le 7 février 2007 à Philadelphie (États Unis)) est un chimiste néo zélandais et ancien professeur à l université de Pennsylvanie. Il obtient le prix …   Wikipédia en Français

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