Configurational, electronic entropies and the thermoelectric properties of nanocarbon ensembles
Document Type
Article
Publication Date
4-21-2008
Abstract
Reaction of disperse ultrananocrystalline diamond (UNCD) and mixtures of UNCD containing 10%-20% nanoboron carbide (B4 C) with methane gas at temperatures near 1200 K results in mechanically rigid compacts called nanocarbon ensembles (NCE) and boron-doped NCE, respectively. Seebeck coefficient and electrical conductivity results lead to strongly temperature dependent power factors that increase 30-40 fold for boron containing ensembles compared to undoped material. It is likely that boron substitutional doping of nanographite crystallites results in a multiplicity of electronic states within a narrow energy band around the Fermi level leading to an increase in configurational electronic entropy. © 2008 American Institute of Physics.
Publication Title
Applied Physics Letters
Recommended Citation
Gruen, D.,
Bruno, P.,
&
Xie, M.
(2008).
Configurational, electronic entropies and the thermoelectric properties of nanocarbon ensembles.
Applied Physics Letters,
92(14).
http://doi.org/10.1063/1.2909150
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/8872