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251004s2025 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202512804
|2 doi
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|a pubmed25n1589.xml
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|a (DE-627)NLM393597172
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|a (NLM)41045191
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Lee, Gyu Rac
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Acidity-Mediated Metal Oxide Heterointerfaces
|b Roles of Substrates and Surface Modification
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|c 2025
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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 Revised 04.10.2025
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a © 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
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|a Although strong modulation of interfacial electron concentrations by the relative acidity of surface additives is suggested, direct observation of corresponding changes in surface conductivity, crucial for understanding the role of local space charge, is lacking. Here, a model platform comprising well-aligned mixed ionic-electronic conducting Pr0.2Ce0.8O2-δ nanowire arrays (PCONA) is introduced to show that acidity-modulated heterointerfaces predict electron depletion or accumulation, resulting in tunable electrical properties. Three orders of magnitude increased PCONA conductivity are confirmed with basic Li2O infiltration. Moreover, the relative acidity of the insulating substrate supporting the PCONA strongly influences its electronic properties as well. This strategy is further validated in purely ionic-conducting nanostructured ceria as well as PCONA. It is suggested that observed conductivity changes stem not only from acidity-mediated space charge potentials at heterointerfaces but also from grain boundaries, chemically-modulated by cation in-diffusion. These findings have broad implications for how substrate and surface treatment choices can alter the conductive properties of nanostructured functional oxides
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|a Journal Article
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4 |
|a electrical conductivities
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| 650 |
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4 |
|a heterointerfaces
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| 650 |
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|a nanostructured functional oxides
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| 650 |
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4 |
|a praseodymium‐doped ceria nanowire arrays
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| 650 |
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|a space charge potentials
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| 650 |
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4 |
|a surface acidity
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| 700 |
1 |
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|a Defferriere, Thomas
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Kim, Jinwook
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Seo, Han Gil
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Jung, Yeon Sik
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tuller, Harry L
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g (2025) vom: 04. Okt., Seite e12804
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
1 |
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|g year:2025
|g day:04
|g month:10
|g pages:e12804
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|u http://dx.doi.org/10.1002/adma.202512804
|3 Volltext
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|a AR
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|j 2025
|b 04
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