About: Ultrafast terahertz photoconductivity in nanocrystalline mesoporous TiO2 films

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Terahertz time-resolved spectroscopy is used to investigate the transport of photoexcited electrons in nanocrystalline mesoporous TiO2 films prepared by the recently proposed %22brick and mortar%22 technology [Szeifert et al. Chem. Mater. 21, 1260 (2009)] with a variable fraction of nanocrystalline titania %22bricks%22 and amorphous titania %22mortar%22. Both long- and short-range conductivity is significantly enhanced upon calcination. After an ultrafast (subpicosecond) regime where the intrananograin conductivity dominates, the electron conductivity becomes limited by the interaction of electrons with the amorphous mortar. Comparison of the experimental results with Monte Carlo simulations of the electron motion allows us to determine the crystalline grain size after calcination and the yield of mobile photocarriers. Terahertz time-resolved spectroscopy is used to investigate the transport of photoexcited electrons in nanocrystalline mesoporous TiO2 films prepared by the recently proposed %22brick and mortar%22 technology [Szeifert et al. Chem. Mater. 21, 1260 (2009)] with a variable fraction of nanocrystalline titania %22bricks%22 and amorphous titania %22mortar%22. Both long- and short-range conductivity is significantly enhanced upon calcination. After an ultrafast (subpicosecond) regime where the intrananograin conductivity dominates, the electron conductivity becomes limited by the interaction of electrons with the amorphous mortar. Comparison of the experimental results with Monte Carlo simulations of the electron motion allows us to determine the crystalline grain size after calcination and the yield of mobile photocarriers. (en)
Title	Ultrafast terahertz photoconductivity in nanocrystalline mesoporous TiO2 films Ultrafast terahertz photoconductivity in nanocrystalline mesoporous TiO2 films (en)
skos:prefLabel	Ultrafast terahertz photoconductivity in nanocrystalline mesoporous TiO2 films Ultrafast terahertz photoconductivity in nanocrystalline mesoporous TiO2 films (en)
skos:notation	RIV/61388955:_____/10:00342062!RIV11-GA0-61388955
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA104/08/0435), P(GD203/08/H032), P(GP202/09/P099), P(IAA100100902), Z(AV0Z10100520), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Rathouský, Jiří Kalousek, Vít
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	294189
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/10:00342062
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	time-resolved terahertz spectroscopy; ultrafast photoconductivity; TiO2 nanoparticles; brick and mortar technology (en)
http://linked.open.../riv/klicoveSlovo	time-resolved terahertz spectroscopy brick and mortar technology ultrafast photoconductivity TiO2 nanoparticles
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[0E846C05C773]
http://linked.open...i/riv/nazevZdroje	Applied Physics Letters
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	%22Inteligentně strukturované%22 mesoporézní vrstvy TiO2 s antibakteriálními a řízeně proměnnými smáčecími vlastnostmi Advanced catalytic processes and materials Ultrafast electron dynamics in disordered organic and inorganic semiconductors studied by time-resolved terahertz spectroscopy Study of ultrafast photoconductivity and charge transport in thin semiconducting layers using terahertz spectroscopy
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	96
http://linked.open...iv/tvurceVysledku	Fattakhova-Rohlfing, D. Kalousek, Vít Kužel, Petr Němec, Hynek Rathouský, Jiří Kadlec, Filip Bein, T. Szeifert, J.
http://linked.open...ain/vavai/riv/wos	000274516900030
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	0003-6951
number of pages	3 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Ultrafast terahertz photoconductivity in nanocrystalline mesoporous TiO2 films Ultrafast terahertz photoconductivity in nanocrystalline mesoporous TiO2 films Ultrafast terahertz photoconductivity in nanocrystalline mesoporous TiO2 films

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