Electron delocalization in amorphous carbon by ion implantation
نویسندگان
چکیده
منابع مشابه
Effects of ion implantation on electron centers in hydrogenated amorphous carbon films
Electron spin resonance ~ESR! and Raman spectra measurements are carried out on a-C:H and a-C:H:N films both as grown and implanted with W and Ni ions with doses ranged from 0.5 310 to 1.2310 cm. The as-grown films have small concentration of paramagnetic centers with a spin density Ns of 10 17 cm. Upon implantation a significant increase in Ns of (0.5– 22) 310 cm centers with g (Si)52.0055 and...
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The magnetisation and electron spin resonance (ESR) spectrum of two specimens of tetrahedral amorphous carbon (ta-C), deposited from a filtered cathodic arc, were measured over a wide temperature range. The magnetisation was found to consist of superparamagnetic, paramagnetic and diamagnetic contributions. The superparamagnetic contribution resembled that recently found in carbon prepared from ...
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The electronic properties of disordered carbon based materials can be discussed in terms of the clustering of the sp 2 carbon phase and delocalization of the electron wavefunction. In smooth amorphous carbon thin films this results in a mixed phase material of conductive sp 2 clusters embedded in an electrically insulating sp 3 matrix. The delocalization of the electron wavefunction associated ...
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Here, we will discuss the electrical transport processes that occur within thin films of polymeric amorphous carbon, which possess a high resistivity of 10 V cm, a Tauc band gap of 2.6 eV, and a low defect density of 10 spins cm. Using current versus voltage measurements, we have shown that the current is space-charge-limited, with a mobility value of typically 10 cm V s. The implantation of bo...
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In this study, the blast furnace slag was used as absorbing bed and then, its ionic adsorption was studied. For this reason, various experimental parameters such as pH, contact time and the primary ion concentration were investigated. The remaining concentrations of ions such as; Mn2+ and Fe2+ in water were measured by atomic adsorption spectroscopy. The chemical and p...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2001
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.63.121201