نتایج جستجو برای: diamond film

تعداد نتایج: 110993  

2006
Luming Shen Zhen Chen LUMING SHEN ZHEN CHEN

To better understand the mechanical response of ultrananocrystalline diamond (UNCD) and its grain boundary mechanism, a numerical study is performed of the specimen size and rate effects on the mechanical properties of single crystal diamond and UNCD films under uniaxial and shear loading paths, respectively. To compare with the UNCD films, single crystal diamond blocks of various sizes under t...

Journal: :Physical chemistry chemical physics : PCCP 2016
Chaoyu He Chunxiao Zhang Jin Li Xiangyang Peng Lijun Meng Chao Tang Jianxin Zhong

In our present work, five previously proposed sp(3) carbon crystals were suggested as silicon allotropes and their stabilities, electronic and optical properties were investigated using the first-principles method. We find that these allotropes with direct or quasi-direct band gaps in a range of 1.2-1.6 eV are very suitable for applications in thin-film solar cells. They display strong adsorpti...

2004
J J Blandino D G Goodwin

The use of a magnetoplasmadynamic (MPD) accelerator for diamond synthesis is investigated. The acceleration process in an MPD device is reviewed and results presented for a test in which a low power (15 kW) MPD accelerator was used as the gas activation source for diamond deposition. A hydrogen–argon mixture was used in the discharge with externally injected methane as the carbon precursor. Res...

2010
E. Verveniotis A. Kromka B. Rezek

A nanocrystalline diamond (NCD) thin film (80 nm) is deposited on a p-type Si substrate and oxygen terminated by radio frequency (r.f.) oxygen plasma. An atomic force microscope (AFM) is used to induce electrostatically charged micrometer-sized areas on the diamond film by applying a bias voltage on the AFM tip during contact mode scan. Trapped charge is detected by Kelvin force microscopy (KFM...

2011
Fengbin Liu Guangping He Ming Zhao Min Qu Lingjiao Huang

The electrochemical behaviors of different chlorophenols at boron-doped diamond thin film electrode were investigated. Four chlorophenols, the 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP), 2,4,6-trichlorophenol (2,4,6TCP) and pentachlorophenol (PCP), with various number of chlorine atoms in the benzene rings, were studied by using cyclic voltammetry at different scan rates over the poten...

Journal: :Nanoscale 2013
Jayakumar Shalini Kamatchi Jothiramalingam Sankaran Chung-Li Dong Chi-Young Lee Nyan-Hwa Tai I-Nan Lin

Significant difference was observed for the simultaneous detection of dopamine (DA), ascorbic acid (AA), and uric acid (UA) mixture using nitrogen incorporated diamond nanowire (DNW) film electrodes grown by microwave plasma enhanced chemical vapor deposition. For the simultaneous sensing of ternary mixtures of DA, AA, and UA, well-separated voltammetric peaks are obtained using DNW film electr...

Laser micro-Raman spectroscopy is an ideal tool for assessment and characterization of various types of carbon-based materials. Due to its special optical properties (CrN) coated stainless steel substrates. NCD films have been investigated by laser micro-Raman spectroscopy. The fingerprint of diamond based materials is in the spectral region of 1000-1600 cm-1 in the first order of Raman scatter...

2003
AK. Kulkarni K. Tey H. Rodrigo

Diamond thin films grown on high resistivity, (100) oriented silicon substrates by the hot filament chemical vapor deposition (HFCVD) method have been characterized by four-point probe and current-voltage (through film) techniques. The resistivities of the as-grown, chemically etched and annealed samples lie in the range of 1 O* fl cm to 10’ 0 cm. The Raman measurements on these samples indicat...

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