Synthesis of diamond with high nitrogen concentration from powder catalyst-C-additive NaN3 by HPHT

Liang, Zhongzhu; Kanda, H.; Jia, Xingtao; Ma, Hongan; Zhu, Pinwen; Guan, Qingfeng; Chuan-Yi, Zang

doi:10.1016/j.carbon.2005.10.018

Cited by 75 publications

(32 citation statements)

References 16 publications

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“…Die meisten über diese Methode hergestellten Diamanten bestehen aus kleinen Körnern des Typs Ib (die Klassifikation von Diamanten mit isolierten Stickstoffverunreinigungen, die sich im Diamant verteilt befinden) mit Größen von einigen Mikrometern bis zu ca. ~10 mm [14] . Diese Diamanten enthalten oft bereits Substitutions-Stickstoffatome, die P1-Zentren genannt werden und vom Lösungsmittel, Metall und der Kohlenstoffquelle sowie von Gasrestmengen im HPHT-Reaktor stammen können.…”

Section: Herstellung Von Makroskopischen Diamanten Für Die Diamantquaunclassified

Diamond Quantum Devices in Biology

Jelezko

Plenio³

et al. 2016

Angew Chem Int Ed

270

230

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The currently available techniques for molecular imaging capable of reaching atomic resolution are limited to low temperatures, vacuum conditions, or large amounts of sample. Quantum sensors based on the spin-dependent photoluminescence of nitrogen-vacancy (NV) centers in diamond offer great potential to achieve single-molecule detection with atomic resolution under ambient conditions. Diamond nanoparticles could also be prepared with implanted NV centers, thereby generating unique nanosensors that are able to traffic into living biological systems. Therefore, this technique might provide unprecedented access and insight into the structure and function of individual biomolecules under physiological conditions as well as observation of biological processes down to the quantum level with atomic resolution. The theory of diamond quantum sensors and the current developments from their preparation to sensing techniques have been critically discussed in this Minireview.

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Section: Herstellung Von Makroskopischen Diamanten Für Die Diamantquaunclassified

Diamond Quantum Devices in Biology

Jelezko

Plenio³

et al. 2016

Angew Chem Int Ed

270

230

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“…By using six cubic WC anvils and the pressure medium, generally it is possible to achieve a 5.50 GPa in the large sample volume. [3,4] Furthermore, LV-CHPA is one of the most compact devices, since it can provide a more uniformly pressurized sample cell, and it can be adjusted accurately under the high pressure and high temperature. It is well known that the achieved pressure in the LV-CHPA is limited by the corresponding WC anvil and the gasket technology.…”

Section: Introductionmentioning

confidence: 99%

Hybrid-toroidal anvil: a replacement for the conventional WC anvil used for the large volume cubic high pressure apparatus

Han

Yang

Jia

et al. 2014

High Pressure Research

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We propose a design and operation of a hybrid-toroidal anvil used for the large volume cubic high pressure apparatus (LV-CHPA), such that it is possible to obtain a higher sintered quality, less weight and cost of tungsten carbide (WC) anvil than the conventional anvil. We use the finite element simulations to show the distributions of the stress on the surface and in the bulk of the WC anvils, and conclude that, for a given load on the hybrid-toroidal anvil, the volume of the compressed press medium has increased by 4.88%, and the rate of the transmitted pressure has increased by 6.72% compared with the conventional anvil. Furthermore, the advantages of the hybrid-toroidal anvil are that the movement of anvils increases by 37.14% and the growth rate of the fatigue crack decreases by 40%. This has been proved by the high pressure experiments. This work gives an approach to optimize the WC anvils used for the LV-CHPA and presents a simple method to achieve the higher sample pressure and the larger sample volume.

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“…It has for long been recognized that one of the distinctions between natural diamonds and synthetic HPHT diamonds grown using metal solvent-catalysts is the essential difference in the concentration of nitrogen impurity. Synthetic diamonds typically contain 200-300 ppm of nitrogen, though nitrogen content can be increased to about 2000 ppm if nitrogen-containing compounds are added to the metal catalysts [32][33][34]. Natural diamonds are known to show highly variable nitrogen concentrations ranging from less than 10 ppm (type IIa) to as high as 3000-4000 ppm [35][36][37], with values of about 1000 ppm being quite frequent [37].…”

Section: Nitrogen Impurity Content In the Grown Diamond Layersmentioning

confidence: 99%