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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la301129v
|2 doi
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|e rakwb
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| 041 |
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|a eng
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1 |
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|a Vittadini, Andrea
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Defects in oxygen-depleted titanate nanostructures
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 28.09.2012
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|a Date Revised 19.07.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The identification of defects and their controlled generation in titanate nanostructures is a key to their successful application in photoelectronic devices. We comprehensively explored the effect of vacuum annealing on morphology and composition of Na(2)Ti(3)O(7) nanowires and protonated H(2)Ti(3)O(7) nanoscrolls using a combination of scanning electron microscopy, Auger and Fourier-transform infrared (FT-IR) spectroscopy, as well as ab initio density functional theory (DFT) calculations. The observation that H(2)Ti(3)O(7) nanoscrolls are more susceptible to electronic reduction and annealing-induced n-type doping than Na(2)Ti(3)O(7) nanowires is attributed to the position of the conduction band minimum. It is close to the vacuum level and, thus, favors the Fermi level-induced compensation of donor states by cation vacancies. In agreement with theoretical predictions that suggest similar formation energies for oxygen and sodium vacancies, we experimentally observed the annealing induced depletion of sodium from the surface of the nanowires
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|a Journal Article
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1 |
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|a Schirmer, Michael
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Walz, Marie-Madeleine
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Vollnhals, Florian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lukasczyk, Thomas
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Steinrück, Hans-Peter
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Marbach, Hubertus
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Riss, Alexander
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Elser, Michael J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Schürer, Benedikt
|e verfasserin
|4 aut
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| 700 |
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|a Diwald, Oliver
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 20 vom: 22. Mai, Seite 7851-8
|w (DE-627)NLM098181009
|x 1520-5827
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|g volume:28
|g year:2012
|g number:20
|g day:22
|g month:05
|g pages:7851-8
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