Chemical Nucleation of Diamond Films

Mandal, Soumen; Thomas, Evan L. H.; Jenny, Titus A.; Williams, Oliver A.

doi:10.1021/acsami.6b08286

Cited by 29 publications

(20 citation statements)

References 28 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%

“…[8] Later the successful growth of CVD diamond crystals from adamantane seeds has been widely reported in the literature. [9][10][11] High structural perfection and low impurity level are characteristic of HPHT nanodiamonds synthesized from hydrocarbons. So far, the mechanisms of diamonds synthesis from organics, as well as the luminescent properties of impurity centers formed in such diamonds were mainly studied.…”

Section: Introductionmentioning

confidence: 99%

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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%

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 graphitic carbon is generally not seen in lms with high seeding density. 176 If we compare the diamond growth by Chen et al 174,175 with that of Tiwari et al 173 discussed above, a marginal increase in seeding density can be seen. However, this can be attributed to the solvent 177 even though in the case of Chen et al 174,175 they do not see in any noticeable enhancement in seeding due to the solvents.…”

Section: Chemical Nucleationmentioning

confidence: 86%

Nucleation of diamond films on heterogeneous substrates: a review

Mandal

2021

RSC Adv.

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“…Recent research has shown that electrostatic adsorption and self-assembly on modified substrate surface results in very high nanocrysalline particle densities by taking advantage of the electrostatic interactions between the nanocrysalline particle and silicon surface. [17,18] In this study, the diamond nucleation on WC-Co was enhanced by considering the charge of the nanocrystalline diamond particles at varying pH-values.…”

Section: Introductionmentioning

confidence: 97%

Enhanced Diamond Nucleation on Cemented Carbide Cutting Tools by Employing Electrostatic Self-Assembly Seeding

Wang¹,

Handschuh‐Wang²,

Jiang³

et al. 2016

Proceedings of the 3rd International Conference on Material Engineering and Application (ICMEA 2016)

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Abstract. Nanodiamond seeding is a well-established approach to enhance the nucleation density in chemical vapor deposition (CVD) diamond growth. However, nanodiamond seeding is highly dependent on the properties of nanodiamond particles, the solvent and the substrate. In this work we present a simple electrostatic self-assembly method to enhance the nucleation of diamond film on cemented carbide (WC-Co) substrates. The nanodiamond particles were adsorbed to WC-Co substrate surfaces governed by electrostatic interactions, which can be controlled by the surface groups of the particles and the pH of a solvent. By varying the pH of the media, the nanodiamond particles were rendered either positively or negatively charged. The positive charged nanodiamond particles (pH < 2.5) enhanced the nucleation of diamond on oxidized WC-Co substrates. The highest nucleation density of diamond on WC-Co substrates was achieved to be 1.0 ± 0.1 × 10 10 cm -2 , which is comparable to the highest record achieved by applying bias voltage to generate plasma. The nanodiamond particles also shortened the incubation time of diamond nucleation to less than 10 min on TiB 2 interlayer. This electrostatic induced adsorption of diamond nanoparticles is crucial for the development of ultra-high nucleation densities for the growth of high performance nanocrystalline diamond films, especially for micro sized tools with sharp cutting edges applying for Micro and Nano Electro-Mechanical Systems.

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Chemical Nucleation of Diamond Films

Cited by 29 publications

References 28 publications

Structure and Luminescence Properties of Nanonodiamonds Produced from Adamantane

Structure and Luminescence Properties of Nanonodiamonds Produced from Adamantane

Nucleation of diamond films on heterogeneous substrates: a review

Enhanced Diamond Nucleation on Cemented Carbide Cutting Tools by Employing Electrostatic Self-Assembly Seeding

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