SIZE-DEPENDENCE OF INFRARED SPECTRA IN NIOBIUM CARBIDE NANOCRYSTALS

V. Alvin Shubert () and Steven P. Lewis ()
Additional contact information
V. Alvin Shubert: Max Planck Advanced Study Group, Center for Free Electron Science, 22607 Hamburg, Germany;
Steven P. Lewis: Department of Physics and Astronomy, Center for Simulational Physics, University of Georgia, Athens, Georgia 30602-2451, USA

International Journal of Modern Physics C (IJMPC), 2012, vol. 23, issue 08, 1-11

Abstract: Niobium carbide nanocrystals of ~1:1 stoichiometry have recently been observed for particle sizes ranging fromNb4C4toNb50C50. Infrared (IR) spectroscopic measurements show that a new band of IR vibrational modes appears with increasing particle size atNb9C9. Using density-functional theory, we show that the vibrational modes in the new band involve structural features present only in nanocrystals with three or more atomic layers in every direction. TheNb9C9nanocrystal is right at this structural threshold.

Keywords: Nanocrystals; niobium carbide; density functional theory; 36.40.Qv; 63.22.Kn; 81.07.Bc; 61.46.Df (search for similar items in EconPapers)
Date: 2012
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0129183112400013
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:ijmpcx:v:23:y:2012:i:08:n:s0129183112400013

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0129183112400013

Access Statistics for this article

International Journal of Modern Physics C (IJMPC) is currently edited by H. J. Herrmann

More articles in International Journal of Modern Physics C (IJMPC) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().