Nanodiamond films with dendrite structure formed by needle crystallites

Zolotukhin, A. A.; Dolganov, Matvey A.; Obraztsov, A. N.

doi:10.1016/j.diamond.2013.04.003

Cited by 10 publications

(4 citation statements)

References 14 publications

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“…This could be a quantitative understanding of how and why only a few needles grow during some preparations of pine-needle-like micro/nanostructures on plane. 51,52,67 Because of relatively low steric hindrance on the line and sphere, the growth of needles is divergent to all around. And more needles stand out in the cluster compared with that on plane.…”

Section: Random Aggregate On a Line Plane And Spherementioning

confidence: 99%

The growth simulation of pine-needle like structure with diffusion-limited aggregation and oriented attachment

Xia

2022

RSC Adv.

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Section: Random Aggregate On a Line Plane And Spherementioning

confidence: 99%

The growth simulation of pine-needle like structure with diffusion-limited aggregation and oriented attachment

Xia

2022

RSC Adv.

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“…2(d). The dendritic growth originates from the seed nanodiamonds at the surface of the SiO 2 layer 17 , forming vertically oriented needle-like structures that are continuous through the UNCD and N-UNCD layers. From the TEM image Fig.…”

Section: Structural Measurementsmentioning

confidence: 99%

Anisotropic three-dimensional weak localization in ultrananocrystalline diamond films with nitrogen inclusions

et al. 2020

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We present a study of the structural and electronic properties of ultra-nanocrystalline diamond films that were modified by adding nitrogen to the gas mixture during chemical vapour deposition growth. Hall bar devices were fabricated from the resulting films to investigate their electrical conduction as a function of both temperature and magnetic field. Through low-temperature magnetoresistance measurements, we present strong evidence that the dominant conduction mechanism in these films can be explained by a combination of 3D weak localization (3DWL) and thermally activated hopping at higher temperatures. An anisotropic 3DWL model is then applied to extract the phase-coherence time as function of temperature, which shows evidence of a power law dependence in good agreement with theory.Electrical measurements were performed on N-UNCD films grown by chemical vapour deposition. These films arXiv:2003.05077v1 [cond-mat.mes-hall]

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“…Образование таких агломераций свидетельствует о некоего рода вертикальных связях в объеме УНКА пленок. В работах [38,39] авторы посредством термического оксидирования алмазной пленки показали, что в УНКА пленках помимо плотной структуры малых алмазных зерен наблюдается рост микроразмерных кристаллов, а также образование дендритных кластеров. Кроме того, в работе [40] в результате электрохимического травлении УНКА была обнаружена дендритная структура алмазных кластеров, которую авторы назвали " алмазными наноперьями" (diamond nanofeathers).…”

Section: Introductionunclassified

“…Такая картина роста говорит о том, что в пленках во время синтеза происходит постоянная активная ренуклеация, которая одновременно обеспечивает формирование сверхмалых кристаллов алмаза, и провоцирует образование кристаллических кластеров со сложной формой, нехарактерной для МКА и НКА структур. В работах[38,39] был описан механизм роста дендритных кластеров в УНКА пленках. Наиболее быстрый рост зародышей происходит в кристаллографическом направлении (100), чем обеспечивается вертикальный рост кластеров, при этом грани (111) из-за структурных дефектов становятся местами для образования вторичных зародышей алмаза.…”

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Исследование Микроструктуры И Свойств Поликристаллических Алмазных Покрытий, Синтезированных Методом HFCVD При Высоких Концентрациях Метана

Митулинский,

Гайдайчук,

Зенкин

et al. 2023

Журнал Технической Физики

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In this paper we present the results of experimental studies of the dependence of the structure and mechanical properties of diamond films grown by HFCVD method in an H2/CH4 atmosphere on variations in the methane concentration (from 5.6 to 19.3 vol %). Films synthesized at 5.6 vol. % CH4 have a columnar microcrystalline structure. The microstructure of films grown at high methane contents (12.2–19.3 vol. %) contains both individual diamond crystals and dendritic clusters, the calculated values of the crystal sizes of such films are ~5 nm. Depending on the deposition parameters, the hardness and elastic modulus of diamond films varied from 50.4 and 520 GPa to 95.15 and 974.5 GPa, respectively. With an increase in the CH4 concentration during deposition, an increase in residual tensile stresses occurs. In addition, the dependence of residual stresses on the film thickness is presented. Ultrananocrystalline coatings have, on average, order of magnitude lower values of surface roughness than microcrystalline ones; in all films, an increase in roughness is observed with an increase in their thickness.

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Nanodiamond films with dendrite structure formed by needle crystallites

Cited by 10 publications

References 14 publications

The growth simulation of pine-needle like structure with diffusion-limited aggregation and oriented attachment

The growth simulation of pine-needle like structure with diffusion-limited aggregation and oriented attachment

Anisotropic three-dimensional weak localization in ultrananocrystalline diamond films with nitrogen inclusions

Исследование Микроструктуры И Свойств Поликристаллических Алмазных Покрытий, Синтезированных Методом HFCVD При Высоких Концентрациях Метана

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