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  • American Association for the Advancement of Science (AAAS)  (2)
  • American Institute of Physics (AIP)
  • 1995-1999  (2)
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  • 1
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    Electrostatic deflections and electromechanical resonances of carbon nanotubes (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-05
    Description: Static and dynamic mechanical deflections were electrically induced in cantilevered, multiwalled carbon nanotubes in a transmission electron microscope. The nanotubes were resonantly excited at the fundamental frequency and higher harmonics as revealed by their deflected contours, which correspond closely to those determined for cantilevered elastic beams. The elastic bending modulus as a function of diameter was found to decrease sharply (from about 1 to 0.1 terapascals) with increasing diameter (from 8 to 40 nanometers), which indicates a crossover from a uniform elastic mode to an elastic mode that involves wavelike distortions in the nanotube. The quality factors of the resonances are on the order of 500. The methods developed here have been applied to a nanobalance for nanoscopic particles and also to a Kelvin probe based on nanotubes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Poncharal -- Wang -- Ugarte -- de Heer WA -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1513-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Physics, Georgia Institute of Technology, Atlanta, GA 30332-0430, USA. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA. Laboratorio National de Luz Sincrotron, Cx P.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10066169" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Nanocapillarity and Chemistry in Carbon Nanotubes (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-12-13
    Description: Open carbon nanotubes were filled with molten silver nitrate by capillary forces. Only those tubes with inner diameters of 4 nanometers or more were filled, suggesting a capillarity size dependence as a result of the lowering of the nanotube-salt interface energy with increasing curvature of the nanotube walls. Nanotube cavities should also be less chemically reactive than graphite and may serve as nanosize test tubes. This property has been illustrated by monitoring the decomposition of silver nitrate within nanotubes in situ in an electron microscope, which produced chains of silver nanobeads separated by high-pressure gas pockets.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ugarte -- Chatelain -- de Heer WA -- New York, N.Y. -- Science. 1996 Dec 13;274(5294):1897-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉D. Ugarte, Laboratorio Nacional de Luz Sincrotron (CNPq/MCT), Caixa Postal 6192, 13083-970 Campinas SP, Brazil. A. Chatelain, Institut de Physique Experimentale, Departement Physique, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland. W. A. de Heer, School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8943200" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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    PAPER CURRENT
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