Structural and photoluminescence studies on catalytic growth of silicon/zinc oxide heterostructure nanowires.
Identifieur interne : 000374 ( Main/Exploration ); précédent : 000373; suivant : 000375Structural and photoluminescence studies on catalytic growth of silicon/zinc oxide heterostructure nanowires.
Auteurs : RBID : pubmed:23590803Abstract
Silicon/zinc oxide (Si/ZnO) core-shell nanowires (NWs) were prepared on a p-type Si(111) substrate using a two-step growth process. First, indium seed-coated Si NWs (In/Si NWs) were synthesized using a plasma-assisted hot-wire chemical vapor deposition technique. This was then followed by the growth of a ZnO nanostructure shell layer using a vapor transport and condensation method. By varying the ZnO growth time from 0.5 to 2 h, different morphologies of ZnO nanostructures, such as ZnO nanoparticles, ZnO shell layer, and ZnO nanorods were grown on the In/Si NWs. The In seeds were believed to act as centers to attract the ZnO molecule vapors, further inducing the lateral growth of ZnO nanorods from the Si/ZnO core-shell NWs via a vapor-liquid-solid mechanism. The ZnO nanorods had a tendency to grow in the direction of [0001] as indicated by X-ray diffraction and high resolution transmission electron microscopy analyses. We showed that the Si/ZnO core-shell NWs exhibit a broad visible emission ranging from 400 to 750 nm due to the combination of emissions from oxygen vacancies in ZnO and In2O3 structures and nanocrystallite Si on the Si NWs. The hierarchical growth of straight ZnO nanorods on the core-shell NWs eventually reduced the defect (green) emission and enhanced the near band edge (ultraviolet) emission of the ZnO.
DOI: 10.1186/1556-276X-8-174
PubMed: 23590803
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Structural and photoluminescence studies on catalytic growth of silicon/zinc oxide heterostructure nanowires.</title><author><name sortKey="Chong, Su Kong" uniqKey="Chong S">Su Kong Chong</name><affiliation wicri:level="1"><nlm:affiliation>Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia. sukong1985@yahoo.com.my.</nlm:affiliation><country xml:lang="fr">Malaisie</country><wicri:regionArea>Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, Kuala Lumpur 50603</wicri:regionArea></affiliation></author><author><name sortKey="Dee, Chang Fu" uniqKey="Dee C">Chang Fu Dee</name></author><author><name sortKey="Abdul Rahman, Saadah" uniqKey="Abdul Rahman S">Saadah Abdul Rahman</name></author></titleStmt><publicationStmt><date when="2013">2013</date><idno type="doi">10.1186/1556-276X-8-174</idno><idno type="RBID">pubmed:23590803</idno><idno type="pmid">23590803</idno><idno type="wicri:Area/Main/Corpus">000677</idno><idno type="wicri:Area/Main/Curation">000677</idno><idno type="wicri:Area/Main/Exploration">000374</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Silicon/zinc oxide (Si/ZnO) core-shell nanowires (NWs) were prepared on a p-type Si(111) substrate using a two-step growth process. First, indium seed-coated Si NWs (In/Si NWs) were synthesized using a plasma-assisted hot-wire chemical vapor deposition technique. This was then followed by the growth of a ZnO nanostructure shell layer using a vapor transport and condensation method. By varying the ZnO growth time from 0.5 to 2 h, different morphologies of ZnO nanostructures, such as ZnO nanoparticles, ZnO shell layer, and ZnO nanorods were grown on the In/Si NWs. The In seeds were believed to act as centers to attract the ZnO molecule vapors, further inducing the lateral growth of ZnO nanorods from the Si/ZnO core-shell NWs via a vapor-liquid-solid mechanism. The ZnO nanorods had a tendency to grow in the direction of [0001] as indicated by X-ray diffraction and high resolution transmission electron microscopy analyses. We showed that the Si/ZnO core-shell NWs exhibit a broad visible emission ranging from 400 to 750 nm due to the combination of emissions from oxygen vacancies in ZnO and In2O3 structures and nanocrystallite Si on the Si NWs. The hierarchical growth of straight ZnO nanorods on the core-shell NWs eventually reduced the defect (green) emission and enhanced the near band edge (ultraviolet) emission of the ZnO.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">23590803</PMID><DateCreated><Year>2013</Year><Month>04</Month><Day>29</Day></DateCreated><DateCompleted><Year>2013</Year><Month>04</Month><Day>30</Day></DateCompleted><DateRevised><Year>2013</Year><Month>05</Month><Day>02</Day></DateRevised><Article PubModel="Electronic"><Journal><ISSN IssnType="Print">1931-7573</ISSN><JournalIssue CitedMedium="Print"><Volume>8</Volume><Issue>1</Issue><PubDate><Year>2013</Year></PubDate></JournalIssue><Title>Nanoscale research letters</Title><ISOAbbreviation>Nanoscale Res Lett</ISOAbbreviation></Journal><ArticleTitle>Structural and photoluminescence studies on catalytic growth of silicon/zinc oxide heterostructure nanowires.</ArticleTitle><Pagination><MedlinePgn>174</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1186/1556-276X-8-174</ELocationID><Abstract><AbstractText>Silicon/zinc oxide (Si/ZnO) core-shell nanowires (NWs) were prepared on a p-type Si(111) substrate using a two-step growth process. First, indium seed-coated Si NWs (In/Si NWs) were synthesized using a plasma-assisted hot-wire chemical vapor deposition technique. This was then followed by the growth of a ZnO nanostructure shell layer using a vapor transport and condensation method. By varying the ZnO growth time from 0.5 to 2 h, different morphologies of ZnO nanostructures, such as ZnO nanoparticles, ZnO shell layer, and ZnO nanorods were grown on the In/Si NWs. The In seeds were believed to act as centers to attract the ZnO molecule vapors, further inducing the lateral growth of ZnO nanorods from the Si/ZnO core-shell NWs via a vapor-liquid-solid mechanism. The ZnO nanorods had a tendency to grow in the direction of [0001] as indicated by X-ray diffraction and high resolution transmission electron microscopy analyses. We showed that the Si/ZnO core-shell NWs exhibit a broad visible emission ranging from 400 to 750 nm due to the combination of emissions from oxygen vacancies in ZnO and In2O3 structures and nanocrystallite Si on the Si NWs. The hierarchical growth of straight ZnO nanorods on the core-shell NWs eventually reduced the defect (green) emission and enhanced the near band edge (ultraviolet) emission of the ZnO.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Chong</LastName><ForeName>Su Kong</ForeName><Initials>SK</Initials><Affiliation>Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia. sukong1985@yahoo.com.my.</Affiliation></Author><Author ValidYN="Y"><LastName>Dee</LastName><ForeName>Chang Fu</ForeName><Initials>CF</Initials></Author><Author ValidYN="Y"><LastName>Abdul Rahman</LastName><ForeName>Saadah</ForeName><Initials>S</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2013</Year><Month>04</Month><Day>17</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Nanoscale Res Lett</MedlineTA><NlmUniqueID>101279750</NlmUniqueID><ISSNLinking>1556-276X</ISSNLinking></MedlineJournalInfo><OtherID Source="NLM">PMC3637626</OtherID></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2013</Year><Month>1</Month><Day>23</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2013</Year><Month>4</Month><Day>2</Day></PubMedPubDate><PubMedPubDate PubStatus="aheadofprint"><Year>2013</Year><Month>4</Month><Day>17</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2013</Year><Month>4</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2013</Year><Month>4</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2013</Year><Month>4</Month><Day>18</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>epublish</PublicationStatus><ArticleIdList><ArticleId IdType="pii">1556-276X-8-174</ArticleId><ArticleId IdType="doi">10.1186/1556-276X-8-174</ArticleId><ArticleId IdType="pubmed">23590803</ArticleId><ArticleId IdType="pmc">PMC3637626</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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