Synthesis of diamond from a chlorinated organic substance under hydrothermal conditions

Korablov, Sergiy; Yokosawa, Kazunori; Sasaki, Taku; Korablov, Dmytro; Kawasaki, Akira; Ioku, Koji; Ishida, Emile H.; Yamasaki, Nakamichi

doi:10.1007/s10853-006-1487-4

Cited by 2 publications

(2 citation statements)

References 46 publications

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“…The first one consists of mixing diamond seeds with different liquids such as 10 M NaOH, C-H-O rich, water, 1,1,1-tichlorethane, hexachlorocyclohexane or dichloromethane. These experiments were mostly performed in piston cylinder (1–2 GPa) ( Figure 7 a) or Roy-Tuttle autoclave (few hundred MPa) at temperatures up to 1450 °C (mostly to 300 °C) and for duration between 1 and 21 days, mostly 3 days [ 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 ]. In all these studies, it is unclear if diamonds grow on seeds or not.…”

Section: On the Way To Catalyst-free/binderless Synthetic Diamondsmentioning

confidence: 99%

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A Review of Binderless Polycrystalline Diamonds: Focus on the High-Pressure–High-Temperature Sintering Process

2022

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Nowadays, synthetic diamonds are easy to fabricate industrially, and a wide range of methods were developed during the last century. Among them, the high-pressure–high-temperature (HP–HT) process is the most used to prepare diamond compacts for cutting or drilling applications. However, these diamond compacts contain binder, limiting their mechanical and optical properties and their substantial uses. Binderless diamond compacts were synthesized more recently, and important developments were made to optimize the P–T conditions of sintering. Resulting sintered compacts had mechanical and optical properties at least equivalent to that of natural single crystal and higher than that of binder-containing sintered compacts, offering a huge potential market. However, pressure–temperature (P–T) conditions to sinter such bodies remain too high for an industrial transfer, making this the next challenge to be accomplished. This review gives an overview of natural diamond formation and the main experimental techniques that are used to synthesize and/or sinter diamond powders and compact objects. The focus of this review is the HP–HT process, especially for the synthesis and sintering of binderless diamonds. P–T conditions of the formation and exceptional properties of such objects are discussed and compared with classic binder-diamonds objects and with natural single-crystal diamonds. Finally, the question of an industrial transfer is asked and outlooks related to this are proposed.

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Section: On the Way To Catalyst-free/binderless Synthetic Diamondsmentioning

confidence: 99%

“…In all these studies, even though diamond formation was difficult to assess, a range of composition in the C-H-O system was determined for diamond formation. This range of composition was extended under oxidizing conditions [ 94 ].…”

Section: On the Way To Catalyst-free/binderless Synthetic Diamondsmentioning

confidence: 99%

A Review of Binderless Polycrystalline Diamonds: Focus on the High-Pressure–High-Temperature Sintering Process

2022

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Growth of sub-10 nm fluorescent nanodiamonds

Alzahrani¹,

Alkahtani²

2023

Opt. Mater. Express

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Small and rounded-shape fluorescent nanodiamonds (FNDs) are of special interest for many promising applications, especially in biology. It was recently shown multiple times that rounded and small nanodiamonds (NDs) with a size less than 10 nm can easily be grown using hydrothermal growth experiments. As the growth of diamond nanocrystals at mild growth conditions is still controversial, it was important to prove the real diamond growth by creation of color centers that are unique to diamond. In this work, we report a hydrothermal growth of small NDs at low temperatures (220 o C) and the saturated vapor pressure of water using a simple and available hydrocarbon (glucose). Small and rounded NDs with a size less than 10 nm were grown and then made fluorescent by appropriate ion implantation and post-annealing. In particular nitrogen-vacancy (NV) and silicon-vacancy (SiV) color centers were created in the grown small NDs to validate that the grown crystals are in fact cubic diamond. Because of its simplicity, and ability to grow high-quality diamond, this novel growth technique holds promise for the most demanding applications to biology.

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Synthesis of diamond from a chlorinated organic substance under hydrothermal conditions

Cited by 2 publications

References 46 publications

A Review of Binderless Polycrystalline Diamonds: Focus on the High-Pressure–High-Temperature Sintering Process

A Review of Binderless Polycrystalline Diamonds: Focus on the High-Pressure–High-Temperature Sintering Process

Growth of sub-10 nm fluorescent nanodiamonds

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