On the relation between chemical composition and optical properties of detonation nanodiamonds
作者： A.R. Kirmani , W. Peng , R. Mahfouz , A. Amassian , Y. Losovyj
DOI: 10.1016/J.CARBON.2015.06.038
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摘要: Abstract The morphology and presence of impurities strongly influence mechanical, optical, electrical, thermal properties detonation nanodiamonds (DNDs). Here we report insights on the chemical composition its effect optical DNDs obtained by rate-zonal density gradient ultracentrifugation. Herein, for first time, a detailed valence band structure as-prepared oxidized is reported. Photoemission spectroscopy (PES) measurements demonstrate that defects, originating from fullerene-like C bonding in sp 2 shells DNDs, are governing literature-reported loss emission spectral features arising nitrogen-vacancy (NV) center excitations. X-ray photoelectron (XPS) reveal nitrogen present form N–O bonded species located at surface region/sp shells, while core DND it N–C/N species.
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