Near Surface Structures and the Electronic States of Polar InN

2018 ◽  
Vol 86 (3) ◽  
pp. 103-108
Author(s):  
Yoshiyuki Yamashita ◽  
Anli Yang ◽  
Keisuke Kobayashi
Keyword(s):  
Electronic States ◽  
Surface Structures ◽  
Near Surface

SURFACE BONDING STATES OF NANO-CRYSTALLINE DIAMOND BALLS

2001 ◽  
Vol 15 (31) ◽  
pp. 4071-4085 ◽  
Author(s):  
J. L. PENG ◽  
SHAUN BULCOCK ◽  
PETER I. BELOBROV ◽  
L. A. BURSILL
Keyword(s):  
Electron Microscopy ◽  
Chemical Vapour ◽  
Structural Models ◽  
Electronic States ◽  
Surface Structures ◽  
Atomic Scale ◽  
Nano Crystalline ◽  
Transmission Electron ◽  
Diffraction Patterns ◽  
Electron Energy Loss

The rough surface of nano-crystalline diamond spheres induces surface electronic states which appear as a broadened pre-peak over approx. 15 eV at the C K-edge energy threshold for carbon in the parallel electron energy loss spectrum (PEELS). This appears to be at least partially due to 1s-π* transitions, although typically the latter occupy a range of only 4 eV for the sp2 edge of highly-oriented pyrollytic graphite (HOPG). No π* electrons appear in the conduction band inside the diamond particles, where all electrons are sp3 hybridized. PEELS data were also obtained from a chemical vapour deposited diamond film (CVDF) and gem-quality diamond for comparison with the spectra of nano-diamonds. The density of sp2 and sp3 states on the surface of diamond nano-crystals is calculated for simple structural models of the diamond balls, including some conjecture about surface structures. The results are used to interpret the sp2/sp3 ratios measured from the PEELS spectra recorded as scans across the particles. Surface roughness at the atomic scale was also examined using high-resolution transmission electron microscopy (HRTEM) and electron nano-diffraction patterns were used to confirm the crystal structures.

Surface structures and electronic states of silicon nanotubes stabilized by oxygen atoms

2007 ◽  
Vol 102 (2) ◽  
pp. 024313 ◽  
Author(s):  
Mingwen Zhao ◽  
R. Q. Zhang ◽  
Yueyuan Xia
Keyword(s):  
Electronic States ◽  
Surface Structures ◽  
Silicon Nanotubes ◽  
Oxygen Atoms
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