Field emission from metal-containing amorphous carbon composite films

Lau, Shu Ping; Li, Y. J.; Tay, Beng Kang; Sun, Zhuo; Chen, G. Y.; Chen, J. S.; Ding, Xing

doi:10.1016/s0925-9635(01)00403-4

Cited by 17 publications

(5 citation statements)

References 19 publications

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“…The diamond-like carbon (DLC) film is a hard lining with diamondlike characteristics, biocompatible to human cells, 20,21 presenting high wear resistance, low coefficient of friction, high chemical inertia, semiconductor gaps and bactericidal properties 22 and this last property may be increased with the silver nanoparticles becoming also fungicide. 23 The DLC has been used in implants as a surface coating for prosthetic screws 24 and prosthetic pillars 25 aiming to torque maintenance.…”

Section: Received 21 March 2019; Accepted 15 April 2019mentioning

confidence: 99%

Diamond-like carbon films over reconstructive TMJ prosthetic materials: Effects in the cytotoxicity, chemical and mechanical properties

Silva

Figueiredo

Prado

et al. 2019

Journal of Oral Biology and Craniofacial Research

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Increasingly more young patients have been submitted to reconstruction of the Temporomandibular Joint (TMJ), so, the prostheses must to present more functional longevity. Objective: To evaluate the effect of diamond-like carbon film (DLC) over titanium alloy (Ti6Al4V) and polyethylene (UHWPE) samples, their mechanical and chemical properties and cellular cytotoxicity. Methods: Titanium and UHWPE specimens, with 2.5 cm in diameter and 2 mm thickness were coated through plasma enhanced chemical vapor deposition (PECVD) with DLC or DLC doped with silver (DLC-Ag). Scanning electron microscopy (SEM) morphological analysis, Energy-dispersive spectroscopy (EDS) chemical analysis, scratching test, mechanical fatigue test, surface roughness analysis, and cellular cytotoxicity were performed. Data were statistically analyzed using one-way ANOVA (p < 0.05) or two-way ANOVA and multiple comparison Tukey test. Results: In the SEM analysis, morphological differences were observed on substrates after DLC deposition. The film chemically modified the substrate surfaces, according to the EDS analysis. The initial critical load failure occurred at 6.1 N for DLC and 9.7 N for the DLC-Ag film. The DLC film deposition over the polyethylene promoted a decrease in the polymer's damaged area after mechanical fatigue cycling. The cytotoxicity analysis demonstrated less biocompatibility in experimental groups, when compared to control, however, increased biocompatibility was observed, at 10 days, in all groups. Conclusion: The diamond-like carbon coating enhanced the chemical and mechanical properties from substrates, however modified biological interaction course of the titanium alloy (Ti6Al4V) and polyethylene (UHWPE) samples. Parameters for film deposition remain to be improved in order to obtain best biocompatibility.

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Section: Received 21 March 2019; Accepted 15 April 2019mentioning

confidence: 99%

Diamond-like carbon films over reconstructive TMJ prosthetic materials: Effects in the cytotoxicity, chemical and mechanical properties

Silva

Figueiredo

Prado

et al. 2019

Journal of Oral Biology and Craniofacial Research

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“…The plasmons can be considered as a sort of proxy for the light, except at a shorter wavelength. A flurry of experimental and theoretical activities over the past few decades [15][16][17][18][19][20][21][22][23][24][25][26] was devoted towards the understanding of the size and shape effects, broadening, effect of surrounding matrix, etc., on the surface plasmon band of gold, silver and its nano composites. The surface plasmon resonance largely depend on the particle size, shape, and of course the metallic material and its surrounding environment.…”

Section: Surface Plasmon Resonancementioning

confidence: 99%

“…Although metal doping in another exotic dielectric medium, diamond like carbon (DLC) films, prepared by chemical/ physical vapour deposition techniques had been the issue of obtaining a new class of materials [15][16][17][18][19][20][21][22][23][24][25][26] but the difficulty of dispersing the metal particles homogeneously in the DLC matrix by the techniques used by the researchers was found to be difficult. Since DLC is a large band gap material, metal inclusion in nanocrystalline form should also reveal interesting optical properties like surface plasmon resonance in these classes of composite materials which have not been explored yet systematically.…”

Section: Surface Plasmon Resonancementioning

confidence: 99%

Plasmonics for Improved Photovoltaic Devices

Ghosh¹

2017

JOJMS

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Several approaches have been adopted in the past for increasing the light absorption in photovoltaic solar cells. The introduction of a plasmonic layer of Ib metal nanoparticles (pure or embedded in a dielectric layer) has been recognized as a viable alternate approach for enhancing light absorption. The scattering from metal nanoparticles near their localized plasmon resonance seemed to be a promising way of increasing the light absorption in thin-film solar cells. Enhancements in photo current have been observed for a wide range of semiconductors and solar cell configurations. In this short note, a review of the experimental and theoretical progress that has been made in recent years, the basic mechanisms, and an outlook on future prospects in this area is presented.

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“…but a successful and homogeneous distribution of metal nanoparticles is continued to be a challenge. Some groups have investigated and reported successful and consistent distribution of nanoparticles of noble metals into the DLC matrix by a chemical route -electrodeposition process [13][14][15].…”

Section: Introductionmentioning

confidence: 99%