Tuning the conduction mechanism in niobium-doped titania nanoparticle networks
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F11%3A00361372" target="_blank" >RIV/68378271:_____/11:00361372 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/jp200822y" target="_blank" >http://dx.doi.org/10.1021/jp200822y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/jp200822y" target="_blank" >10.1021/jp200822y</a>
Alternative languages
Result language
angličtina
Original language name
Tuning the conduction mechanism in niobium-doped titania nanoparticle networks
Original language description
Networks of niobium-doped TiO2 anatase nanoparticles with variable doping concentrations were investigated by time-domain terahertz spectroscopy and microwave impedance spectroscopy. A detailed description of their electromagnetic response is proposed; the model takes into account the depolarization fields of inhomogeneous samples and allows us to understand the conductive and dielectric response of individual nanoparticles. We find that electron hopping is the dominating contribution to the conductivity at terahertz frequencies and that the dielectric losses of TiO2 nanoparticles are enhanced in comparison with bulk anatase. The conductive properties of nanoparticles can be tuned via synthesis conditions and thermal posttreatment. In particular, annealing at elevated temperatures improves the nanoparticle crystallinity, reduces the density of structural defects, and enhances the conductive percolation of the network.
Czech name
—
Czech description
—
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
—
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physical Chemistry C
ISSN
1932-7447
e-ISSN
—
Volume of the periodical
115
Issue of the periodical within the volume
14
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
6968-6974
UT code for WoS article
000289215400103
EID of the result in the Scopus database
—