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Low compressibility carbon nitrides
David M. Teter,Russell J. Hemley +1 more
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TLDR
A cubic form of C3N4 with a zero-pressure bulk modulus exceeding that of diamond is described in this paper, and a process for preparing such product which comprises combining carbon and nitrogen at a pressure of 120,000 to 800,000 atmosphere and a temperature of 1000-3000 °C is described.Abstract:
A cubic form of C3N4 with a zero-pressure bulk modulus exceeding that of diamond Also a process for preparing such product which comprises combining carbon and nitrogen at a pressure of 120,000 to 800,000 atmosphere and a temperature of 1000-3000 °C Carbon particles may be immersed in liquid nitrogen and the mixture heated by a laser beam followed by quenchingread more
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Diamond-like amorphous carbon
TL;DR: In this paper, the authors describe the deposition methods, deposition mechanisms, characterisation methods, electronic structure, gap states, defects, doping, luminescence, field emission, mechanical properties and some applications of diamond-like carbon.
Journal ArticleDOI
Graphitic Carbon Nitride (g-C3N4)-Based Photocatalysts for Artificial Photosynthesis and Environmental Remediation: Are We a Step Closer To Achieving Sustainability?
TL;DR: It is anticipated that this review can stimulate a new research doorway to facilitate the next generation of g-C3N4-based photocatalysts with ameliorated performances by harnessing the outstanding structural, electronic, and optical properties for the development of a sustainable future without environmental detriment.
Journal ArticleDOI
Polymeric Graphitic Carbon Nitride as a Heterogeneous Organocatalyst: From Photochemistry to Multipurpose Catalysis to Sustainable Chemistry
TL;DR: The "polymer chemistry" of g-C(3)N(4) is described, how band positions and bandgap can be varied by doping and copolymerization, and how the organic solid can be textured to make it an effective heterogenous catalyst.
Journal ArticleDOI
A review on g-C3N4-based photocatalysts
TL;DR: In this paper, the fundamental mechanism of heterogeneous photocatalysis, advantages, challenges and the design considerations of g-C3N4-based photocatalysts are summarized, including their crystal structural, surface phisicochemical, stability, optical, adsorption, electrochemical, photoelectrochemical and electronic properties.
Journal ArticleDOI
Modeling hardness of polycrystalline materials and bulk metallic glasses
TL;DR: In this paper, it was shown that the intrinsic correlation between hardness and elasticity of materials correctly predicts Vickers hardness for a wide variety of crystalline materials as well as bulk metallic glasses (BMGs).
References
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Iterative minimization techniques for ab initio total-energy calculations: molecular dynamics and conjugate gradients
TL;DR: In this article, the authors describe recent technical developments that have made the total-energy pseudopotential the most powerful ab initio quantum-mechanical modeling method presently available, and they aim to heighten awareness of the capabilities of the method in order to stimulate its application to as wide a range of problems in as many scientific disciplines as possible.
Journal ArticleDOI
Prediction of new low compressibility solids.
Amy Y. Liu,Marvin L. Cohen +1 more
TL;DR: The empirical model indicates that hypothetical covalent solids formed between carbon and nitrogen are good candidates for extreme hardness and first principles pseudopotential total energy calculation on the system shows that materials like the prototype can have bulk moduli comparable to or greater than diamond.
Journal ArticleDOI
Finite strain isotherm and velocities for single-crystal and polycrystalline NaCl at high pressures and 300°K
TL;DR: In this article, a large portion of the data is consistent, to within reasonable uncertainties, with the Eulerian formulation of finite strain, in the BE2 form, which contains three parameters, of which two, K0 and K0′, are obtainable from single-crystal ultrasonic measurements, while the third, K 0″, may be found with the aid of shock wave data.
Journal ArticleDOI
Calculation of bulk moduli of diamond and zinc-blende solids.
TL;DR: Theoretical arguments on the role of covalency in determining the bulk moduli of diamond and zinc-blende semiconductors and insulators are shown to yield a surprisingly simple and accurate expression for determining the Bulk Moduli B of these materials as discussed by the authors.
Journal ArticleDOI
Structural properties and electronic structure of low-compressibility materials: β- Si 3 N 4 and hypothetical β- C 3 N 4
TL;DR: The bulk modulus of \ensuremath{\beta}-${\mathrm{C}}_{3}$ is found to be comparable to diamond, and its moderately large cohesive energy suggests that the prototype structure may be metastable.