Templated Growth of Hexagonal Nickel Carbide Nanocrystals on Vertically Aligned Carbon Nanotubes (PREPRINT)

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Abstract:

Nanocrystals of hexagonal nickel carbide have been synthesized via physical vapor deposition of elemental nickel onto the surface of vertically aligned carbon nanotubes. Combining high resolution transmission electron microscopy HRTEM with three-dimensional atom probe tomography 3DAP confirmed that these nanocrystals have a hexagonal structure, are enriched in carbon, and have a composition of Ni-25atC Ni3C. This metastable hexagonal nickel carbide phase appears to be stabilized due to the growth of the nanocrystals on the surface of the nanotubes that act as a template and also as a source of carbon. The stability of this nickel carbide phase has also been investigated by Density Functional Theory DFT calculations and compared to the experimental results.

Author(s):
Hwang, J. Y. ; Singh, A. R. ; Chaudhari, M. ; Tiley, J. S. ; Zhu, Y. ; Du, J. ; Banerjee, R.
Author Organization(s):
UNIVERSITY OF NORTH TEXAS DENTON
Descriptive Note:
Journal article preprint
Supplementary Note:
Journal article submitted to Advanced Materials.
Pagination:
0014

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFRL-RX-WP-TP-2010-4066
Task Number(s):
RG
Project Number(s):
4347
Monitor Series:
TP-2010-4066, AFRL-RX-WP
 Subject Terms
Joint Capability Areas:
JCA_1.2.3_Educating; JCA_5_Command and Control; JCA_4.6_Engineering
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*NICKEL, *CARBON NANOTUBES, *CRYSTALS, NANOSTRUCTURES, TOMOGRAPHY, METAL CRYSTALS, CARBIDES, VAPOR DEPOSITION
Field(s)/Group(s):
Refractory Fibers, Metallurgy and Metallography, Crystallography
Keyword(s):
*NICKEL CARBIDE, HEXAGONAL NICKEL CARBIDE, ATOM PROBE TOMOGRAPHY, *HYBRID NANOSTRUCTURE, *METAL NANOCRYSTALS, PE62102F, WUAFRLM02R1000
Report Date:
2009 Jan 01
Creation Date:
2010 Jun 23