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Träfflista för sökning "(WFRF:(Zheng J)) srt2:(2000-2004) srt2:(2000)"

Search: (WFRF:(Zheng J)) srt2:(2000-2004) > (2000)

  • Result 1-8 of 8
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1.
  • Zheng, W.T., et al. (author)
  • Chemical bonding, structure, and hardness of carbon nitride thin films
  • 2000
  • In: Diamond and related materials. - 0925-9635 .- 1879-0062. ; 9:9-10, s. 1790-1794
  • Conference paper (other academic/artistic)abstract
    • Carbon nitride films are deposited on Si(001) substrates by reactive d.c. magnetron sputtering graphite in a pure N2 discharge. The chemical bonding and structure of carbon nitride films were probed using Fourier transformation infrared (FTIR) and near edge X-ray absorption fine structure (NEXAFS), and the hardness was evaluated using nanoindentation experiments. The structure and hardness for the films are dependent on the substrate temperature (T(s)). FTIR and NEXAFS spectra show that N atoms are bound to sp1, sp2 and sp3 hybridized C atoms, and the intensity of p(*) resonance for C1s NEXAFS spectra is the lowest for the film grown at T(s) = 350°C, having a turbostratic-like structure, high hardness and stress. The correlation between the structure and hardness of carbon nitride films is discussed. (C) 2000 Elsevier Science S.A. All rights reserved.Carbon nitride films are deposited on Si(001) substrates by reactive d.c. magnetron sputtering graphite in a pure N2 discharge. The chemical bonding and structure of carbon nitride films were probed using Fourier transformation infrared (FTIR) and near edge X-ray absorption fine structure (NEXAFS), and the hardness was evaluated using nanoindentation experiments. The structure and hardness for the films are dependent on the substrate temperature (Ts). FTIR and NEXAFS spectra show that N atoms are bound to sp1, sp2 and sp3 hybridized C atoms, and the intensity of p* resonance for C1s NEXAFS spectra is the lowest for the film grown at Ts = 350°C, having a turbostratic-like structure, high hardness and stress. The correlation between the structure and hardness of carbon nitride films is discussed.
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  • Mileikowsky, C, et al. (author)
  • Natural transfer of viable microbes in space - 1. From Mars to Earth and Earth to Mars
  • 2000
  • In: ICARUS. - : ACADEMIC PRESS INC. - 0019-1035. ; 145:2, s. 391-427
  • Journal article (peer-reviewed)abstract
    • The possibility and probability of natural transfer of viable microbes from Mars to Earth and Earth to Mars traveling in meteoroids during the first 0.5 Ga and the following 4 Ga are investigated, including: radiation protection against the galactic cosmi
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  • Mileikowsky, C, et al. (author)
  • Risks threatening viable transfer of microbes between bodies in our solar system
  • 2000
  • In: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 48:11, s. 1107-1115
  • Journal article (peer-reviewed)abstract
    • A fraction of the number of ejecta expelled from a planet by comet or asteroid impacts end up landing on another planet. If microorganisms were living in the ground before impact, they would be transported inside ejecta to the target planet. During that p
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  • Result 1-8 of 8

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