Formation of Continuous Nanocrystalline Diamond Layers on Glass and Silicon at Low Temperatures

Kromka, Alexander; Rezek, Bohuslav; Remeš, Z.; Michalka, M.; Ledinský, Martin; Zemek, J.; Potmesil, J.; Vaněček, M.

doi:10.1002/cvde.200706662

Cited by 81 publications

(62 citation statements)

References 27 publications

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“…in coating of quartz or complementary metal oxide semiconductors. Kromka et al [19] investigated an impact of the low-temperature MW CVD process on optical properties of nanocrystalline diamond films (NCD) on silicon and quartz substrates; the films displayed a transmittance of ca. 70% and a high refractive index of 2.34 at the 550 nm wavelength.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Optical and Electrical Properties of Transparent Conductive Boron-Doped Diamond thin Films Grown on Fused Silica

Bogdanowicz¹

2014

Metrology and Measurement Systems

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A conductive boron-doped diamond (BDD) grown on a fused silica/quartz has been investigated. Diamond thin films were deposited by the microwave plasma enhanced chemical vapor deposition (MW PECVD). The main parameters of the BDD synthesis, i.e. the methane admixture and the substrate temperature were investigated in detail. Preliminary studies of optical properties were performed to qualify an optimal CVD synthesis and film parameters for optical sensing applications. The SEM micro-images showed the homogenous, continuous and polycrystalline surface morphology; the mean grain size was within the range of 100-250 nm. The fabricated conductive boron-doped diamond thin films displayed the resistivity below 500 mOhm cm -1 and the transmittance over 50% in the VIS-NIR wavelength range. The studies of optical constants were performed using the spectroscopic ellipsometry for the wavelength range between 260 and 820 nm. A detailed error analysis of the ellipsometric system and optical modelling estimation has been provided. The refractive index values at the 550 nm wavelength were high and varied between 2.24 and 2.35 depending on the percentage content of methane and the temperature of deposition.

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Section: Introductionmentioning

confidence: 99%

Characterization of Optical and Electrical Properties of Transparent Conductive Boron-Doped Diamond thin Films Grown on Fused Silica

Bogdanowicz¹

2014

Metrology and Measurement Systems

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“…[38][39][40][41] In 1 mL of PLGA solution, 0.007 g of the ND powder was added and was homogeneously dispersed by mixing and sonication (Labsonic U-2000, B Braun Biotech, Goettingen, Germany, sonication time 5 seconds). The sonication was performed immediately before electrospinning in order to minimize clustering of diamond nanoparticles.…”

Section: Preparation Of Nanofibrous Membranesmentioning

confidence: 99%

Nanofibrous poly(lactide-co-glycolide) membranes loaded with diamond nanoparticles as promising substrates for bone tissue engineering

Pařízek

Douglas²,

Novotná³

et al. 2012

IJN

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Background: Nanofibrous scaffolds loaded with bioactive nanoparticles are promising materials for bone tissue engineering. Methods: In this study, composite nanofibrous membranes containing a copolymer of L-lactide and glycolide (PLGA) and diamond nanoparticles were fabricated by an electrospinning technique. PLGA was dissolved in a mixture of methylene chloride and dimethyl formamide (2:3) at a concentration of 2.3 wt%, and nanodiamond (ND) powder was added at a concentration of 0.7 wt% (about 23 wt% in dry PLGA). Results: In the composite scaffolds, the ND particles were either arranged like beads in the central part of the fibers or formed clusters protruding from the fibers. In the PLGA-ND membranes, the fibers were thicker (diameter 270 ± 9 nm) than in pure PLGA meshes (diameter 218 ± 4 nm), but the areas of pores among these fibers were smaller than in pure PLGA samples (0.46 ± 0.02 µm 2 versus 1.28 ± 0.09 µm 2 in pure PLGA samples). The PLGA-ND membranes showed higher mechanical resistance, as demonstrated by rupture tests of load and deflection of rupture probe at failure. Both types of membranes enabled the attachment, spreading, and subsequent proliferation of human osteoblast-like MG-63 cells to a similar extent, although these values were usually lower than on polystyrene dishes. Nevertheless, the cells on both types of membranes were polygonal or spindle-like in shape, and were distributed homogeneously on the samples. From days 1-7 after seeding, their number rose continuously, and at the end of the experiment, these cells were able to create a confluent layer. At the same time, the cell viability, evaluated by a LIVE/DEAD viability/cytotoxicity kit, ranged from 92% to 97% on both types of membranes. In addition, on PLGA-ND membranes, the cells formed well developed talin-containing focal adhesion plaques. As estimated by the determination of tumor necrosis factor-alpha levels in the culture medium and concentration of intercellular adhesion molecule-1, MG-63 cells, and RAW 264.7 macrophages on these membranes did not show considerable inflammatory activity. Conclusion:This study shows that nanofibrous PLGA membranes loaded with diamond nanoparticles have interesting potential for use in bone tissue engineering.

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“…Microcrystalline and large-grained polycrystalline diamond (PCD) films are generally composed by well-defined {100} and {111} facets. High-quality thin nanocrystalline (NCD) films [4,5] were grown from a very high initial nucleation density and these films exhibit a columnar growth, just as for microcrystalline diamond (MCD), except with nano-sized crystallites. Hence, these NCD films were considered as just smaller grained, facetted versions of MCD [6].…”

Section: Introductionmentioning

confidence: 99%

Novel morphology of chemical vapor deposited diamond films

Tang

Fernandes

Abe

et al. 2010

Phys. Status Solidi (c)

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We have obtained simultaneously nanocrystalline and {100} faceted large‐grained polycrystalline diamond films not only on different substrates but also on the same substrate in only one deposition run using a novel approach for substrate arrangement. Furthermore, interesting unusual morphologies and microstructures composed by non‐faceted nanostructures and terminated with large smooth {100} facet‐like belt are found near the edges of the top square sample. The morphology variation is likely caused by the so called edge effect, where a strong variation in temperature is also present. We have modelled the temperature distribution on the substrates by computer simulations using the finite element method. The novel feature, namely the coexistence of oval non‐faceted nanocrystalline diamond grains and large smooth {100} facet‐like belt in one diamond grain, is in the transition from {100} faceted polycrystalline diamond to cauliflower‐like nanocrystalline diamond. The formation mechanism is discussed based on the temperature analysis and other simulation results described in the literature. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Formation of Continuous Nanocrystalline Diamond Layers on Glass and Silicon at Low Temperatures

Cited by 81 publications

References 27 publications

Characterization of Optical and Electrical Properties of Transparent Conductive Boron-Doped Diamond thin Films Grown on Fused Silica

Characterization of Optical and Electrical Properties of Transparent Conductive Boron-Doped Diamond thin Films Grown on Fused Silica

Nanofibrous poly(lactide-co-glycolide) membranes loaded with diamond nanoparticles as promising substrates for bone tissue engineering

Novel morphology of chemical vapor deposited diamond films

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