Huffman , Donald Ray

Huffman , Donald Ray
(1935–) American physicist
Born at Fort Worth in Texas, Huffman was educated at Texas Agricultural and Mechanical College, at Rice University, Houston, and at the University of California, Riverside, where he completed his PhD in 1966. After spending a postdoctoral year at the University of Frankfurt, Huffman moved to the University of Arizona, Tucson, in 1967 and was later appointed professor of physics in 1975.
In 1985 in the laboratory of Richard Smalley a new form of carbon had been discovered: C60, known asbuckminsterfullerene. The C60 was produced by vaporizing a graphite target with a pulsed laser beam. The sooty carbon produced in this manner certainly contained a detectable amount of C60, but all efforts to extract the substance from the residue in amounts sufficient to carry out a detailed spectroscopic study failed.
Huffman, in collaboration with Wolfgang Kratschmer of the Max Planck Institute for Physical Chemistry, Heidelberg, was involved in the discovery of the new forms of carbon known as fullerenes. For many years they had been interested in the nature of interstellar dust, which they believed to be mainly carbon. The interstellar matter has a characteristic broad absorption spectrum and Huffman and Kratschmer were experimenting with various forms of finely divided carbon produced in electric arcs. During this work, around 1982, they found a form of carbon with a peculiar double hump, which they called “the camel.”
When, in 1985, they heard of the discovery of C60, buckminsterfullerene, they suspected that this might be the cause of their camel spectrum. Huffman and Kratschmer reproduced their earlier experimental conditions, in which they had formed a carbon powder by striking an arc between graphite electrodes in a low pressure of helium.
They treated the resulting soot with benzene, from which they crystallized a light-yellow solid, which they named fullerite. It was later found to contain about 75% of C60 together with 25% of another fullerene, C70. The method has allowed the production of fullerenes in large quantities.

Scientists. . 2011.

Поможем сделать НИР

Look at other dictionaries:

  • List of Rachael Ray guests — This is a list of notable guests that have been on the Rachael Ray Show A*Paula Abdul, pop singer and American Idol judge *Amy Adams, actress *Clay Aiken, pop singer and American Idol season two runner up *Alan Alda *Laila Ali *Joan Allen *Tim… …   Wikipedia

  • Carbon nanotube — Not to be confused with Carbon fiber. Part of a series of articles on Nanomaterials Fullerenes …   Wikipedia

  • Duncanville High School — is a secondary school located in Duncanville, Texas, United States. The school is a part of the Duncanville Independent School District. The school includes grades 9 through 12. The high school campus is the largest in the nation in terms of… …   Wikipedia

  • Sigmund Romberg — (* 29. Juli 1887 in Nagykanizsa; † 9. November 1951 in New York) war ein amerikanischer Komponist ungarischer Herkunft. Inhaltsverzeichnis 1 Biografie 1.1 Herkunft und Ausbildung …   Deutsch Wikipedia

  • Liste des joueurs de NBA — Cette liste regroupe l ensemble des joueurs ayant évolué en National Basketball Association. Les joueurs actuels, jouant en NBA sont inscrits en gras. Cette liste inclut des joueurs de la National Basketball League (NBL), de la Basketball… …   Wikipédia en Français

  • List of stage names — This list of stage names lists performers alphabetically according to surname (assumed or genuine) and their nickname. Individuals who have dropped their last name and substituted their middle name as their last name are listed. Also listed are… …   Wikipedia

  • Codes for electromagnetic scattering by spheres — this article list codes for electromagnetic scattering by a homogeneous sphere, layered sphere, and cluster of spheres. Some of the source codes may be available on [1]. Contents 1 Solution techniques 2 Classification …   Wikipedia

  • List of Law & Order characters — This is a list of main, notable, and recurring characters appearing in the American television police procedural and legal drama Law Order and its spin offs , , and . Characters in bold print are active for the current 2007 08 season. Main… …   Wikipedia

  • Homosexualität im Film — Diese Liste enthält Filme mit homosexuellem Inhalt, sei es eine dargestellte Einzelperson in mehr als einer Nebenrolle oder eine gleichgeschlechtliche Begegnung. Chronologische Filmliste 1910er Jahre Anders als die Andern (D 1919) Regie: Richard… …   Deutsch Wikipedia

  • List of University of Notre Dame athletes — This list of University of Notre Dame athletes includes graduates, non graduate former students, and current students of Notre Dame who are notable for their achievements within athletics, sometimes before or after their time at Notre Dame. Other …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”