allotrope

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allotrope

any of two or more physical forms in which an element can exist

allotrope

[′a·lə‚trōp]
(chemistry)
A form of an element showing allotropy.

allotrope

A chemical element that can take on different forms based on the structure of, or the number of atoms in, the molecule. The most common example is carbon. If carbon atoms are bonded in a lattice of four triangular surfaces (tetrahedral), it is a diamond. If the atoms are bonded in sheets of six-sided (hexagonal) lattice, it is graphite. See isotope.
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Its capability of forming sp, [sp.sup.2], and [sp.sup.3] bonds renders a large variety of carbon allotropes. Notably, diamond and graphite are the most well-known 3D allotropes of carbon, while graphene, carbon nanotube (CNT), and fullerene are the most widely studied 2D, 1D (or quasi-1D), and 0D allotropes.
Carbon-Based Materials for Thermoelectrics
Based on that theory, the thermodynamic stability of different graphyne allotropes was assessed by investigating their vibrational properties, lattice thermal expansion coefficients, and Gibbs free energy values.
Atomic-Scale Finite Element Method for Analyzing the Sensitivity of Graphyne-Based Resonators
Functionalization of nanostructured carbon allotropes by high-molecular compounds usually leads to the increased interaction between the nanofiller and the polymer matrix, ensuring considerable improvement of exploitation properties in comparison to neat polymer matrix.
Carbon nanotubes modified with octylthiophene derivatives for improved performance of ethylene-octene copolymer composites
Carbon nanotubes (CNTs) are minuscule allotropes of carbon with sizes to the scale of nanometers.
Carbon Nanotubes Market by Type (SWCNTS & MWCNTS), Application (Electronics, Chemicals, Energy, Medical, Composites, Aerospace & more) & Geography - Global Trends & Forecasts To 2018
Forms of carbon include several allotropes such as graphene and graphite as well as the fullerenes, which cover any molecule composed entirely of carbon, in the form of a hollow sphere, ellipsoid, or tube.
Strongly localized image states of spherical graphitic particles
Following Jenkins, I consider the ethnic group one of the "allotropes" of the nation by virtue of their fundamental similarity as forms both of identification at the individual and group levels and of social categorization.
Consuming ethnic identities: "materializing" the nation and the minority in Sabah
"As carbon descends through the atmosphere, amorphous carbon becomes graphite which then is converted into diamond, creating various strata of carbon allotropes (diamond)," the authors of the study (http://aas.org/files/resources/dps_abstract_book.pdf) noted .
Saturn and Jupiter have Diamond-Studded Atmospheres
at whether the two substances are different allotropes of the same
Nanotechnology: using co-regulation to bring regulation of modern technologies into the 21st century
"Nitrogen is the most abundant constituent in air and it is inert diatomic gas while graphite is the most thermodynamically stable form of carbon allotropes," said Prof.
UNIST: Direct Nitrogen Fixation for Low Cost Energy Conversion
Elemental Se has been known to exist in various allotropic forms, as red amorphous form, black vitreous form, three ([alpha], [beta], [gamma]) of red crystalline monoclinic forms and grey/black crystalline hexagonal (also referred to as trigonal) form which is also the most stable form, and some more allotropes are discovered recently (8), (9).
Effect of oral supplementation of biogenic selenium nanoparticles on white blood cell profile of BALB/c mice and mice exposed to X-ray radiation
The mineral graphite is one of the allotropes of carbon and crystalline "flake" graphite is one of its principal types with plate-like structure.
Blood compatibility and biomedical applications of graphene
Firstly, these materials are predominantly made up of pure carbon, and so are called carbon allotropes. These materials range from allotropes of diamond and graphite, to fullerenes, graphene and more complex structures such as car bon nanotubes.
Characterizing carbon nanomaterials: Raman spectroscopy can detect small changes in the structural morphology of carbon nanomaterials, making it an ideal solution for material sciences

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