Oxygen vacancies in oxidized and reduced vertically aligned α-MoO3 nanoblades

Loading...
Thumbnail Image
Date
2022
Editors
Contact
Journal ISSN
Electronic ISSN
ISBN
Bibliographical data
Publisher
Series
DOI (citable link)
ArXiv-ID
International patent number
EU project number
Project
Open Access publication
Restricted until
Title in another language
Research Projects
Organizational Units
Journal Issue
Publication type
Journal article
Publication status
Published
Published in
Materials Advances ; 3 (2022), 8. - pp. 3571-3581. - Royal Society of Chemistry (RSC). - eISSN 2633-5409
Abstract
Functionalized materials are highly desired for technological advancements spanning physics, chemistry, materials science, and biology due to their unique electronic properties. One such example is molybdenum trioxide (MoO3), a metal oxide with multiple oxidation states. Manipulating these oxidation states can alter the electronic properties, for instance, defects and electrical conductivity, by several orders of magnitude. In this work, oxygen vacancy-mediated intrinsic defects in vertically aligned a-MoO3 crystals are systematically tuned via thermal treatment under different reducing and oxidizing atmospheres. The positions and the concentration of the oxygen vacancies and restitution of the oxygen ions have been experimentally demonstrated via a range of techniques including electron paramagnetic resonance, X-ray diffraction, and high-resolution electron microscopy. The calculated concentration of the oxygen vacancies in the a-MoO3-x via EPR measurements is in the range of x = 0.004–0.049. The mechanism of the formation of oxygen vacancies in the a-MoO3-x crystal is understood via color center formation and polaron migration models. These oxygen vacancies show no influence on the optical band gap. However, they significantly impact the electrical conductivity on the order of 102 Sm-1 by altering the MoO3 properties from semi-insulating to conducting.
Summary in another language
Subject (DDC)
530 Physics
Keywords
Conference
Review
undefined / . - undefined, undefined. - (undefined; undefined)
Cite This
ISO 690NOBY, Sohaila Z., Azhar FAKHARUDDIN, Stefan SCHUPP, Muhammad SULTAN, Marina KRUMOVA, Malte DRESCHER, Mykhailo AZARKH, Klaus BOLDT, Lukas SCHMIDT-MENDE, 2022. Oxygen vacancies in oxidized and reduced vertically aligned α-MoO3 nanoblades. In: Materials Advances. Royal Society of Chemistry (RSC). 3(8), pp. 3571-3581. eISSN 2633-5409. Available under: doi: 10.1039/D1MA00678A
BibTex
@article{Noby2022Oxyge-57361,
  year={2022},
  doi={10.1039/D1MA00678A},
  title={Oxygen vacancies in oxidized and reduced vertically aligned α-MoO<sub>3</sub> nanoblades},
  number={8},
  volume={3},
  journal={Materials Advances},
  pages={3571--3581},
  author={Noby, Sohaila Z. and Fakharuddin, Azhar and Schupp, Stefan and Sultan, Muhammad and Krumova, Marina and Drescher, Malte and Azarkh, Mykhailo and Boldt, Klaus and Schmidt-Mende, Lukas}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/57361">
    <dc:contributor>Schupp, Stefan</dc:contributor>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:contributor>Sultan, Muhammad</dc:contributor>
    <dc:creator>Fakharuddin, Azhar</dc:creator>
    <dcterms:title>Oxygen vacancies in oxidized and reduced vertically aligned α-MoO&lt;sub&gt;3&lt;/sub&gt; nanoblades</dcterms:title>
    <dcterms:issued>2022</dcterms:issued>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:contributor>Krumova, Marina</dc:contributor>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/57361"/>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/57361/1/Noby_2-147yntf1qqt5g3.pdf"/>
    <dcterms:rights rdf:resource="http://creativecommons.org/licenses/by-nc/3.0/"/>
    <dc:creator>Drescher, Malte</dc:creator>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/52"/>
    <dc:creator>Schmidt-Mende, Lukas</dc:creator>
    <dc:contributor>Drescher, Malte</dc:contributor>
    <dc:language>eng</dc:language>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/29"/>
    <dcterms:abstract xml:lang="eng">Functionalized materials are highly desired for technological advancements spanning physics, chemistry, materials science, and biology due to their unique electronic properties. One such example is molybdenum trioxide (MoO&lt;sub&gt;3&lt;/sub&gt;), a metal oxide with multiple oxidation states. Manipulating these oxidation states can alter the electronic properties, for instance, defects and electrical conductivity, by several orders of magnitude. In this work, oxygen vacancy-mediated intrinsic defects in vertically aligned a-MoO&lt;sub&gt;3&lt;/sub&gt; crystals are systematically tuned via thermal treatment under different reducing and oxidizing atmospheres. The positions and the concentration of the oxygen vacancies and restitution of the oxygen ions have been experimentally demonstrated via a range of techniques including electron paramagnetic resonance, X-ray diffraction, and high-resolution electron microscopy. The calculated concentration of the oxygen vacancies in the a-MoO&lt;sub&gt;3-x&lt;/sub&gt; via EPR measurements is in the range of x = 0.004–0.049. The mechanism of the formation of oxygen vacancies in the a-MoO&lt;sub&gt;3-x&lt;/sub&gt; crystal is understood via color center formation and polaron migration models. These oxygen vacancies show no influence on the optical band gap. However, they significantly impact the electrical conductivity on the order of 10&lt;sup&gt;2&lt;/sup&gt; Sm&lt;sup&gt;-1&lt;/sup&gt; by altering the MoO&lt;sub&gt;3&lt;/sub&gt; properties from semi-insulating to conducting.</dcterms:abstract>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:creator>Noby, Sohaila Z.</dc:creator>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:creator>Schupp, Stefan</dc:creator>
    <dc:creator>Sultan, Muhammad</dc:creator>
    <dc:creator>Krumova, Marina</dc:creator>
    <dc:contributor>Boldt, Klaus</dc:contributor>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-04-29T06:11:47Z</dcterms:available>
    <dc:contributor>Azarkh, Mykhailo</dc:contributor>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/29"/>
    <dc:rights>Attribution-NonCommercial 3.0 Unported</dc:rights>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/52"/>
    <dc:creator>Boldt, Klaus</dc:creator>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/57361/1/Noby_2-147yntf1qqt5g3.pdf"/>
    <dc:contributor>Schmidt-Mende, Lukas</dc:contributor>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-04-29T06:11:47Z</dc:date>
    <dc:creator>Azarkh, Mykhailo</dc:creator>
    <dc:contributor>Noby, Sohaila Z.</dc:contributor>
    <dc:contributor>Fakharuddin, Azhar</dc:contributor>
  </rdf:Description>
</rdf:RDF>
Internal note
xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter
Contact
URL of original publication
Test date of URL
Examination date of dissertation
Method of financing
Comment on publication
Alliance license
Corresponding Authors der Uni Konstanz vorhanden
International Co-Authors
Bibliography of Konstanz
Yes
Refereed
Yes