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Amorphous solid
About: Amorphous solid is a research topic. Over the lifetime, 117050 publications have been published within this topic receiving 2267692 citations.
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TL;DR: This article showed that amorphous configurations have been retained in the solid state by cooling from the melt with sufficient celerity so as to prevent formation of the equilibrium crystalline structures in solid metals and alloys.
Abstract: EXCEPT for thin films deposited at very low temperatures1, highly disordered arrangements of the atoms, similar to that of the liquid state, have never been observed in solid metals and alloys. For some metalloids, the bonding of which may actually be more covalent than metallic, such amorphous configurations have been retained in the solid state2 by cooling from the melt with sufficient celerity so as to prevent formation of the equilibrium crystalline structures.
2,378 citations
TL;DR: It is shown how to use resonant Raman spectroscopy to determine structure and composition of carbon films with and without nitrogen, and the assignment of the peaks at 1150 and 1480 cm−1 often observed in nanodiamond.
Abstract: Raman spectroscopy is a standard characterization technique for any carbon system. Here we review the Raman spectra of amorphous, nanostructured, diamond-like carbon and nanodiamond. We show how to use resonant Raman spectroscopy to determine structure and composition of carbon films with and without nitrogen. The measured spectra change with varying excitation energy. By visible and ultraviolet excitation measurements, the G peak dispersion can be derived and correlated with key parameters, such as density, sp(3) content, elastic constants and chemical composition. We then discuss the assignment of the peaks at 1150 and 1480 cm(-1) often observed in nanodiamond. We review the resonant Raman, isotope substitution and annealing experiments, which lead to the assignment of these peaks to trans-polyacetylene.
2,172 citations
TL;DR: Forouhi and Bloomer as mentioned in this paper presented a parameterization of the optical functions of amorphous semiconductors and insulators in which the imaginary part of the dielectric function e2 is determined by multiplying the Tauc joint density of states by the e2 obtained from the Lorentz oscillator model.
Abstract: A parameterization of the optical functions of amorphous semiconductors and insulators is presented in which the imaginary part of the dielectric function e2 is determined by multiplying the Tauc joint density of states by the e2 obtained from the Lorentz oscillator model. The real part of the dielectric function e1 is calculated from e2 using Kramers–Kronig integration. The parameters of this model are fit to n and k data for amorphous Si (2 data sets), SiO, As2S3, and Si3N4. Comparative fits are made with a similar parameterization presented earlier by Forouhi and Bloomer [Phys. Rev. B 34, 7018 (1986)]. In all cases, the new parameterization fits the data better.
2,090 citations
Book•
01 Jan 1978
TL;DR: The aging of polymeric materials and the alteration of corresponding physical properties are described in this paper, where the aging process is described in terms of the physical properties of the polymeric material.
Abstract: The aging of polymeric materials and the alteration of corresponding physical properties are described. -- AATA
2,070 citations
Book•
01 Jan 1983
TL;DR: The formation of amorphous solids Amorphous Morphology: The Geometry and Topology of Disorder Chalcogenide Glasses and Organic Polymers The Percolation Model Localization Delocalization Transitions Optical and Electrical Properties Index as discussed by the authors.
Abstract: The Formation of Amorphous Solids Amorphous Morphology: The Geometry and Topology of Disorder Chalcogenide Glasses and Organic Polymers The Percolation Model Localization Delocalization Transitions Optical and Electrical Properties Index.
2,051 citations