Terahertz depolarization effects in colloidal TiO2 films reveal particle morphology

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00427099" target="_blank" >RIV/68378271:_____/14:00427099 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1021/jp406897y" target="_blank" >http://dx.doi.org/10.1021/jp406897y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jp406897y" target="_blank" >10.1021/jp406897y</a>

Result language

angličtina

Original language name

Terahertz depolarization effects in colloidal TiO2 films reveal particle morphology

Original language description

The nature of electrical conductivity in films of TiO2 nanoparticles is of fundamental and practical interest. Their conductive properties depend strongly on their morphology and deviate greatly from the properties of the bulk material. We report ultrafast photoconductivity studies of films consisting of sintered TiO2 particles of very different sizes performed using time-resolved Terahertz spectroscopy. Identical photoconductivity spectra are observed for films of particles with diameters of tens and hundreds of nm, which demonstrates that the terahertz photoconductive response of colloidal TiO2 films is not affected by carrier backscattering at particle boundaries. Instead, depolarization fields resulting from the spatial inhomogeneities play the major role. Modelling of the influence of depolarization fields on the terahertz conductivity allows us to explain the measured data and gain insights into the morphology of the film.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

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Volume of the periodical

118

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

1191-1197

UT code for WoS article

000330417100053

EID of the result in the Scopus database

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