Results 261 to 270 of about 5,284,833 (331)
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Mechanical spectroscopy observation of LiAlH4 decomposition
, 2020Dynamic elastic modulus and internal friction of cold consolidated mixtures of Al and LiAlH4 powders have been measured. All reactions and decompositions occurring in LiAlH4 during a thermal run have been detected as dynamic elastic modulus anomalies and
E. G. Campari +4 more
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Mechanical Spectroscopy and other Relaxation Spectroscopies
Solid State Phenomena, 2003Mechanical spectroscopy is a powerful technique in investigations of the molecular mobility, atomic interactions, and more particularly the structural defects in matter. In crystalline materials, the problem is mainly dealing with point defects, dislocations, and their interactions. As a general rule, large frequency and temperature ranges are required
Etienne, Serge +3 more
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Spectroscopy and Mechanism in Triboluminescence
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1992Abstract The presence of C3πu → B3πg emissions of dinitrogen and photoluminescence in triboluminescence spectra provides information about the mechanism of light production.
Linda M. Sweeting +9 more
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Quantum Mechanics and Spectroscopy
2019This chapter reviews the basic quantum mechanics of spectroscopy, analyzing forms of spectroscopy based on the measurement of energy as an atom or molecule undergoes a change in quantum states. It looks at different aspects of quantum mechanics in order to understand instrumental techniques and analysis involving the interaction of light and matter. It
Robert M. Granger +7 more
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Vibrational Spectroscopy of Mechanically Compressed Monolayers
Journal of the American Chemical Society, 2003Sum-frequency spectroscopy has been used to investigate the behavior of self-assembled monolayers in a solid-solid contact. Various alkanethiol layers on gold were observed before, during, and after compression to 660 MPa against a sapphire counterface.
Otto, Berg, David, Klenerman
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Quantum mechanics and spectroscopy
2013This chapter addresses quantum mechanics and spectroscopy. Two key ideas emerge from the theory of quantum mechanics: the first is that the electron is described by a wavefunction, and the second is that the energy of the electron is quantized. The wavefunction is important since its square gives the probability density of the electron.
James Keeler, Peter Wothers
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Mechanical spectroscopy of quasicrystals
Journal of Alloys and Compounds, 2000Quasicrystals are solids with long-range quasiperiodic order and orientational order with disallowed crystallographic symmetry (e.g. 5-fold). In addition to the point defects known from crystals (vacancies, interstitials, or antistructure atoms) quasicrystals contain phasonic defects (phasons), which represent violations of the matching rules.
Damson, B. +4 more
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Mechanical Spectroscopy of Quasicrystals
Solid State Phenomena, 2006The use of mechanical spectroscopy to characterize the quasicrystalline state of solid matter is reviewed. After a general, chronological survey of existing mechanical spectroscopy studies, which include elastic properties as well as various relaxation phenomena between lowtemperature tunneling processes and high-temperature background damping, three ...
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Fourier transform mechanical spectroscopy
Journal of Physics D: Applied Physics, 1986A powerful new experimental method of determining the dynamic mechanical behaviour of viscoelastic materials is described. The method, Fourier transform mechanical spectroscopy (FTMS), consists of superposing and deconvoluting discrete Fourier transforms obtained from a single stress relaxation experiment using a novel sampling scheme.
R G C Arridge, P J Barham
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