Chemical Nucleation for CVD Diamond Growth

Giraud, Anne; Jenny, Titus A.; Leroy, Éric; Küttel, O. M.; Vanelle, Patrice; Giraud, Luc

doi:10.1021/ja002724g

Cited by 12 publications

(20 citation statements)

References 42 publications

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“…It is interesting that nucleation of diamond from cage compounds of carbon and hydrogen atoms was also proposed for diamond growth by CVD technique from mixture of methane with hydrogen . Later the successful growth of CVD diamond crystals from adamantane seeds has been widely reported in the literature …”

Section: Introductionmentioning

confidence: 99%

Structure and Luminescence Properties of Nanonodiamonds Produced from Adamantane

Kudryavtsev

Екимов

Romshin

et al. 2018

Physica Status Solidi (a)

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Nano‐ and micro‐diamonds synthesized from organic compounds at high pressure are a new class of diamond materials, whose physical and chemical properties are not yet studied. In this paper, the structural and luminescence features of such diamonds on an example of a sample synthesized from adamantane at a pressure of 8–9 GPa and a temperature of 1700 K is investigated. In Raman spectra of the sample, lines corresponding to vibrational energies of CHx bonds are found, that reveals a termination of carbon bonds on a diamond surface by hydrogen atoms and explains hydrophobic properties of this material. It is shown, that the hydrophobic properties of nanodiamonds can be replaced by hydrophilic ones by heating them in air up to 700 °C. In photoluminescence spectra of the as‐grown sample, a number of narrow lines are detected in the range of 490–650 nm. Their intensity is insignificant in comparison with the Raman line of diamond and fluctuates in time independently for each of the lines. It is assumed that these lines are associated with a small amount of oxidized graphene clusters on a surface of the diamond nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Structure and Luminescence Properties of Nanonodiamonds Produced from Adamantane

Kudryavtsev

Екимов

Romshin

et al. 2018

Physica Status Solidi (a)

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“…Such covalent attachment then alleviates issues with the low sublimation point of adamantane and increases the likelihood of the molecules acting as nucleation sites upon being subjected to plasma conditions. 22 At the end of exposure, the samples were twice alternately rinsed in ethanol and deionized water for 30 s to remove the excess DVA. Subsequent sonication for 5 min in a portion of dichloromethane then removed ungrafted DVA and residual traces of solvents.…”

Section: Methodsmentioning

confidence: 99%

“…This led Leroy et al 21 to design adamantane based 2,2-divinyladamantane (DVA) for chemical nucleation of diamond consisting of the smallest diamondoid, adamantane (C 10 H 16 ), with two vinyl groups to facilitate covalent attachment to the silicon surface. Giraud et al 22 were then able to demonstrate an increase in the nucleation density above that of bare silicon upon using DVA, however coalesced films were not obtained. It is to be noted that in many of the previous studies on the chemical nucleation of diamond growth the diamondoid molecules were spun-coated on substrates by dissolving in solvents like glycol 15 or toluene.…”

Section: Introductionmentioning

confidence: 99%

Chemical Nucleation of Diamond Films

Mandal

Thomas

Jenny

et al. 2016

ACS Appl. Mater. Interfaces

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ABSTRACT:With the large differences in surface energy between film and substrate in combination with the low sticking coefficient of hydrocarbon radicals, nanocrystalline diamond growth on foreign substrates typically results in poor nucleation densities. A seeding technique is therefore required to realize pinhole-free and thin coalesced films. In this work, a chemical nucleation method for growth of diamond on nondiamond substrates based on 2,2-divinyladamantane is shown. After treating with the carbon-containing DVA, the chemically treated wafers were exposed to low-power-density plasma, known as the incubation phase, to facilitate the formation of diamond nucleation sites followed by a high-power-density growth regime to produce coalesced films. The resulting films demonstrate high crystallinity, whereas the Raman spectra suggest high-quality diamond with low sp 2 content.

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“…Currently several groups have used different seeding materials ͑without scratching͒ such as graphite fibers, fullerenes clusters, hydrocarbon oil, and thin films of different types of carbon for the diamond deposition. [10][11][12] However, despite rapid progress, the growth of diamond film on the silicon substrate by microwave plasma CVD ͑MPCVD͒ still require nucleation step for improvement in terms of yield, quality, purity, and uniformity to synthesis of diamond at relatively low temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

“…Partial breakdown of adamantane is known to yield carbon clusters ͑C n H x ͒, where n = 3, 5, 6, 7, 8, and 9, of significant abundance. 13 7,10 Another important issue in particular CVD diamond, since early 1980 report is the high deposition temperature ͑700-900°C͒, which limits only on thermal stable substrates. The deposition of high quality diamond at low temperature is still challenging even if some studies reported diamond deposition at temperature below 550°C.…”

Section: Introductionmentioning

confidence: 99%