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Fullerene-based Materials Research and Development. LDRD Final Report

1995
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Release : 1995
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Download or read book Fullerene-based Materials Research and Development. LDRD Final Report written by . This book was released on 1995. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry and physical properties of fullerenes, the third, molecular allotrope of carbon, have been studied using both experimental and computational techniques. Early computational work investigated the stability of fullerene isomers and oxides, which was followed by extensive work on hydrogenated fullerenes. Our work led to the first synthesis of a polymer containing C60 and the synthesis of the simplest hydrocarbon derivatives of C60 and C--0. The excellent agreement between theory and experiment (± 0.1 kcal/mol in the relative stability of isomers) has provided insight into the chemical nature of fullerenes and has yielded a sound basis for prediction of the structure of derivatized fullerenes. Such derivatives are the key to the preparation of fullerene-based materials.

New Fullerene-based Mixed Materials

1998
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Release : 1998
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Download or read book New Fullerene-based Mixed Materials written by . This book was released on 1998. Available in PDF, EPUB and Kindle. Book excerpt: This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The authors present results of broadband femtosecond transient absorption and broadband nanosecond optical limiting studies of C60 and derivatized C60. They have investigated both solutions and solid-state mixed materials (sol-gel glass hosts doped with fullerene guests). They show that derivatized fullerenes provide enhanced solubility and processability, with a ground-state absorption extended into the infrared compared with C60. They have extensively studied both the dynamic optical response and the excited-state absorption cross sections of solutions and solids for multiple wavelengths in the visible to near infrared. Wavelength-dependent studies show that the optical limiting response improves monotonically at longer wavelengths, demonstrating broadband limiting in all 6,6 mono-adducts and neat C60. The authors report new approaches to processing sol-gel glass/fullerene composites to improve the optical limiting performance of solid-state materials to approach the response of solution limiters.

Government Reports Announcements & Index

1996 Science
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Release : 1996
Genre : Science
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Download or read book Government Reports Announcements & Index written by . This book was released on 1996. Available in PDF, EPUB and Kindle. Book excerpt:

Energy Research Abstracts

1995 Power resources
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Release : 1995
Genre : Power resources
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Download or read book Energy Research Abstracts written by . This book was released on 1995. Available in PDF, EPUB and Kindle. Book excerpt:

Creation and Destruction of C60 and Other Fullerene Solids. Final Report

1996
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Release : 1996
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Book Synopsis Creation and Destruction of C60 and Other Fullerene Solids. Final Report by :

Download or read book Creation and Destruction of C60 and Other Fullerene Solids. Final Report written by . This book was released on 1996. Available in PDF, EPUB and Kindle. Book excerpt: The 1990 announcement of the Huffman-Kratschmer fullerene-production technique set off a world-wide explosion of research into the properties and potential applications of C60 and C--0. In the last five years, 4,000+ fullerene articles have appeared in the scientific literature dealing with these fascinating molecules and their condensed phases. They possess a complex chemistry reminiscent of the alkenes, and this has led to the syntheses of numerous new compounds and fullerene-based materials, with suggested applications ranging from medicine to photo-conducting polymers to rocket fuel. The work summarized in this report focused on the creation and destruction of fullerene-based materials, for the purpose of producing new materials of interest. This three year project was supported by a grant from the Advanced Energy Projects Division, Office of Basic Energy Sciences, U.S. Department of Energy (DE-FG03-93ER12133). Following are outlines of the work completed in each of the three years, a section devoted to the professional and educational development of those involved, a brief section on the outlook for fullerene-based materials, and an appendix listing the publications resulting from this project.

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