Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00112 : Synthesis, micro and electronic structure investigation of diamond nanorod spherules by High resolution NEXAFS coupled PEEM and field emission performance
Author:
We report the synthesis of Diamond nanorods/flake Spherules (DNRS)
predominantly consisting of UNCD enveloped by graphite in the
form of flake
or a rod with nanodimension, projecting randomly outward in all
directions.
The diamond nanoflake with a diameter of $\sim $2 nm has a
central diamond
(111) core encapsulated by graphitic (0002) lacing. The structure
composition by High Resolution Transmission Electron Microscopy
(HRTEM) and
X ray Photoemission Electron Microscopy (XPEEM) revealed that the
nanoflakes
predominant with core sp$^{3}$ laced with sp$^{2}$, is embedded
in carbon
matrix consisting of other nanocarbon, such as the nanotubes,
nanoonion and
nanowires/sheets. High resolution localized XPEEM combined with XAS
complimented the Raman and the XPS with a weak $\pi $* peak, a
prominent
exitonic and a second band dip, which are the signature of
diamond. The
congregated nanorod spherules exhibits a low-threshold, high
current-density
of 10 mA/cm$^{2}$ at 2.9 V/m which appears to be exceptional when
compared
to many other electron emitting nanostructures. Bias enhanced
DNRS were also
characterized by XPEEM and their FE's compared.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.112
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