Open AccessProbing the Electronic Density of States of Germanium Nanoparticles: A Method for Determining Atomic Structure
Author(s) -
Andrew Williamson,
C. Bostedt,
T. van Buuren,
Trevor M. Willey,
L. J. Terminello,
Giulia Galli,
Laurent Pizzagalli
Publication year - 2004
Publication title -
nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.853
H-Index - 488
eISSN - 1530-6992
pISSN - 1530-6984
DOI - 10.1021/nl049654m
Subject(s) - germanium , dangling bond , materials science , nanoparticle , electronic structure , diamond , valence (chemistry) , nanoscopic scale , chemical physics , electronic band structure , condensed matter physics , density of states , nanotechnology , molecular physics , silicon , optoelectronics , chemistry , physics , organic chemistry , composite material
International audienceWe present first principles electronic structure calculations and photoemission measurements of the change in the valence band DOS of germanium as its dimensions are reduced from the bulk to the nanoscale. By comparing the calculated broadening of the s and s - p band peaks and the energy of surface dangling bonds to the measured DOS we identify the most likely structure of these nanoparticles. We propose that, in contrast to recent interpretations, small 2-3 nm germanium nanoparticles prepared by gas phase aggregation have a distorted diamond structure core and a thermally disordered surface
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