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Surface Modification of Ultradisperse Diamonds by Vacuum Heat Treatment

Gusakov, G. A. ; Lugovski, A. A. ; Lugovski, A. P. ; Samtsov, M. P. ; Parhomenko, V. A. ; Azarko, I. I.

Journal of applied spectroscopy, 2020-03, Vol.87 (1), p.26-34 [Periódico revisado por pares]

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Título:
Surface Modification of Ultradisperse Diamonds by Vacuum Heat Treatment
Autor: Gusakov, G. A. ; Lugovski, A. A. ; Lugovski, A. P. ; Samtsov, M. P. ; Parhomenko, V. A. ; Azarko, I. I.
Assuntos: Analytical Chemistry ; Annealing ; Atomic/Molecular Structure and Spectra ; Detonation ; Diamonds ; Diffraction ; Electron paramagnetic resonance ; Functional groups ; Graphitization ; Heat treatment ; Nanoparticles ; Physics ; Physics and Astronomy ; Raman spectra ; Resonance scattering ; Surface structure ; Vacuum annealing ; X-rays
É parte de: Journal of applied spectroscopy, 2020-03, Vol.87 (1), p.26-34
Descrição: The effect of vacuum annealing temperature at 10 –2 Pa on the surface structure and functionality of ultradisperse diamond (UDD) produced by detonation synthesis was studied using Raman scattering, IR absorption, x-ray diffraction, and electron paramagnetic resonance techniques. Vacuum annealing at ≤750 o C did not affect the structure of diamond nanoparticles although amorphous sp 2 -hybridized carbon began to form on the particle surfaces at higher temperatures. The UDD surface was completely graphitized and the diamond structure of the particle nucleus was preserved after annealing at 1050 o C. Very few functional groups were observed on the UDD surface after annealing at 660–750 o C so that the surface remained highly active.
Editor: New York: Springer US
Idioma: Inglês

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