Download or read book Structural and Optical Characterization of Hydrogenated Amorphous Carbon Thin Films microform written by Dammika P. Manage and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1998 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural and Optical Characterization of Hydrogenated Amorphous Carbon Thin Films written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural and Optical Characterization of Hydrogenated Amorphous Carbon Thin Films written by Dammika P. Manage and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of hydrogenated amorphous carbon (a-C:H) semiconducting thin films was deposited using the dc saddle field glow discharge deposition technique. The ion energy during the deposition was varied to achieve films ranging from soft to hard a-C:H. In order to study the structure and the properties of a-C:H films, ultraviolet, visible, infrared, photoluminescence, and X-ray Auger electron spectroscopies, scanning electron microscopy, and mass density measurements, were used as diagnostic techniques to extract information on growth rate, mass density, sp2/sp3 ratio, hydrogen concentration, Tauc gap, photoluminescence, concentration of non-radiative recombination centers, and the degree of cross-linking of the carbon network. Based on these results, the films studied in the present research are found to consist of sp2carbon clusters of which the size increases with increasing mean ion energy during the deposition, resulting in a lower Tauc gap; this is explained in terms of the Robertson model. The growth rate of the films increases due to an increase in the concentration of unsaturated bond sites which act as chemisorption centers for radicals on the growing film surface. The increased hydrogen evolution from the film at higher ion energies results in increases in the sp2 fraction, the degree of cross-linking of the C-C network, and the mass density of a-C:H films. Atmospheric aging of soft a-C:H films reveals a decrease in the concentration of C-H bonds in a-C:H. The proposed reaction paths for the hydrolysis and oxidation of C:H films indicate that the films mainly react with water. Thermal annealing of a-C:H films in vacuum greatly influences the soft a-C:H films, in which the chemical bonds in the hydrocarbon network are restructured due to the evolution of hydrogen, which results in a graphitic structure.
Download or read book The Optical Characterization of Hydrogenated Amorphous Carbon Thin Films Deposited by a DC PECVD Method written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structural and Optical Properties of Hydrogenated Amorphous Carbon a C H Thin Films Deposited Using a Direct Current plasma Enhanced Chemical Vapour Deposition DC PECVD Technique written by Suriani Abu Bakar and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical and Structural Characterization of Amorphous Carbon Films written by Pratish Mahtani and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fundamental study of the correlations between ion energy, substrate temperature, and plasma density with hydrogen content, percent sp2 bonding, optical gap, and refractive index of hydrogenated amorphous carbon (a-C) films is presented. A strong dependency between the ion energy used during deposition and the film's microstructure is shown. Moreover, it is revealed that the optical properties of the a-C films are controlled by the concentration and size of sp2 clusters in the film. Through N2 mixing in the source gas, room-temperature nitrogen doped polymeric-like a-C films were demonstrated for the first time. X-ray Photoelectron Spectroscopy revealed an increase in the Fermi level of these films with increased nitrogen content. A proof-of-concept a-C based transparent heat mirror (THM) was demonstrated. It was shown that a-C acts as an oxygen-free protective barrier and anti-reflective coating for Ag films in the THM, increasing the transmission in the visible region by 10-20%.
Download or read book Properties of Amorphous Carbon written by S. R. P. Silva and published by IET. This book was released on 2003 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: World experts in amorphous carbon have been drawn together to produce this comprehensive commentary on the current state and future prospects of amorphous carbon, a highly functional material. Amorphous carbon has a wide range of properties that are primarily controlled by the different bond hybridisations possible in such materials. This allows for the growth of an extensive range of thin films that can be tailored for specific applications. Films can range from those with high transparency and which are hard and diamond-like, through to those which are opaque, soft and graphitic-like. Application areas including field emission cathodes, MEMs, electronic devices, medical and optical coatings are now close to market.
Download or read book Properties and Characterization of Amorphous Carbon Films written by J.J. Pouch and published by Trans Tech Publications Ltd. This book was released on 1991-01-01 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amorphous, hydrogenated carbon (AHC) films can be deposited on various substrates using several techniques, e.g. plasma deposition and ion beam deposition. The resulting films can be hard, wear resistant and transparent.
Download or read book Preparation and Characterization of Hydrogenated Amorphous Carbon Films written by B. Meyerson and published by . This book was released on 1981 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical and Mechanical Properties of Amorphous Hydrogenated Carbon Thin Films written by Calvin Bradford Hopper and published by . This book was released on 1991 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Hydrogenated Amorphous Carbon Thin Films written by Dale Gilbert Thompson and published by . This book was released on 1988 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Optical Properties of Hydrogenated Amorphous Carbon a C H Thin Films Deposited Using DC PECVD Technique written by Hazwani Mohd. Som and published by . This book was released on 2008 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Chemical Mechanical and Surface Properties of Thin Films of Hydrogenated Amorphous Carbon written by Gilroy John Vandentop and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1990 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book OPTICAL CHARACTERIZATION OF SILICON BASED HYDROGENATED AMORPHOUS THIN FILMS BY UV VISIBLE AND INFRARED MEASUREMENTS written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Refractive indices, thicknesses, etc. Fourier transform infrared (FT-IR) spectrometry technique has been used to determine transmission & reflection type spectra of these films. Obtained data were analysed to determine bond structures of the films. E®ects of relative concentration of ethylene (C2H4) gas on thin film bond structure and on optical constants have been questioned.
Download or read book Optical Properties of Hydrogenated Amorphous Carbon a C H Thin Film Deposited by DC PECVD Method written by Mohd. Firdaus Md. Shah and published by . This book was released on 2008 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Optical Properties of Hydrogenated Amorphous Carbon a C H Thin Films Deposited Using DC PECVD Technique written by Bakar Ismail and published by . This book was released on 2009 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Optical Properties Hydrogenated Amorphous Carbon a C H Thin Film Prepared by DC PECVD written by ld Nurulnisa Rosli and published by . This book was released on 2010 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
