Leaded crystal and common glass may look similar, but the crystal is made of a rigid scaffolding of atoms, while the glass is a disordered, atomic slurry.
Researchers at the University of Wisconsin-Madison have developed a method for crafting some of the most stable glasses ever formed--materials that are strong and durable like crystal and yet free of the confining properties of an ordered atomic skeleton. They hope the new method will enable drug manufacturers to take advantage of chemicals that had been too insoluble as crystals and too unstable as glasses.
The findings, appearing in the Dec. 8, 2006, issue of Science, announce a method to deposit glass materials layer by layer as a vapor onto a surface with an ideal temperature for yielding stable glasses, an advancement over earlier vapor deposition efforts and different from the more traditional practice of quenching molten material.
Supported by the National Science Foundation and the Department of Agriculture, chemist Mark Ediger and his colleagues at the university collaborated with researchers at the National Institute of Standards and Technology to craft and study stable glasses. One such glass, formed from the anti-inflammatory drug indomethacin, is a test for how pharmaceuticals could benefit from the new technique.
The latest wonder drugs work only if they arrive in the body where they are needed and at the right concentration at the right time. Some potential pharmaceuticals are hindered by being too crystalline--not dissolving quickly enough, or at all, in the body--or too glassy, breaking down too quickly or in uncontrollable ways.
A detailed University of Wisconsin press release is available at: http://www.news.wisc.edu/releases/13279.html
Media Contact: Jill Sakai, University of Wisconsin-Madison, (608) 262-9772, email@example.com
The National Science Foundation (NSF) is an independent federal agency that supports fundamental research and education across all fields of science and engineering, with an annual budget of $5.58 billion. NSF funds reach all 50 states through grants to nearly 1,700 universities and institutions. Each year, NSF receives about 40,000 competitive requests for funding, and makes nearly 10,000 new funding awards. The NSF also awards over $400 million in professional and service contracts yearly.
Receive official NSF news electronically through the e-mail delivery and notification system, MyNSF (formerly the Custom News Service). To subscribe, visit http://www.nsf.gov/mynsf/ and fill in the information under "new users".
Useful NSF Web Sites:
NSF Home Page: http://www.nsf.gov
NSF News: http://www.nsf.gov/news/
For the News Media: http://www.nsf.gov/news/newsroom.jsp
Science and Engineering Statistics: http://www.nsf.gov/statistics/
Awards Searches: http://www.nsf.gov/awardsearch/
Last reviewed: By John M. Grohol, Psy.D. on 21 Feb 2009
Published on PsychCentral.com. All rights reserved.