Spontaneous periodic diameter oscillations in InP nanowires: the role of interface instabilities.
Identifieur interne : 000382 ( Main/Exploration ); précédent : 000381; suivant : 000383Spontaneous periodic diameter oscillations in InP nanowires: the role of interface instabilities.
Auteurs : RBID : pubmed:23205668Abstract
We have observed that thin InP nanowires generated by vapor-liquid-solid growth display spontaneous periodic diameter oscillations when large group III supersaturations are used. Diameter variations are associated with a large number of stacking faults and crystallographic phase changes(wurtzite/zinc-blende); also the axial distance between oscillations depends on the indium precursor flow used during the run. We attribute the morphology changes to a substantial deformation of the triple phase line (vapor-liquid-solid) at the catalyst nanoparticle edge originated from multistep nucleation during growth. The deformation alters the mechanical force balance acting on the nanoparticle during growth in such a way that the particle displaces from the nanowire top and wets the nanowire sidewall. Subsequently, as catalytic growth occurs at the sidewall, the associated increase in diameter will eventually push the NP back to its original wire-top position until the onset of a new instability at the triple phase line.
DOI: 10.1021/nl302891b
PubMed: 23205668
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Spontaneous periodic diameter oscillations in InP nanowires: the role of interface instabilities.</title><author><name sortKey="Oliveira, D S" uniqKey="Oliveira D">D S Oliveira</name><affiliation wicri:level="1"><nlm:affiliation>Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, UNICAMP, 13083-859, Campinas, SP, Brazil.</nlm:affiliation><country xml:lang="fr">Brésil</country><wicri:regionArea>Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, UNICAMP, 13083-859, Campinas, SP</wicri:regionArea></affiliation></author><author><name sortKey="Tizei, L H G" uniqKey="Tizei L">L H G Tizei</name></author><author><name sortKey="Ugarte, D" uniqKey="Ugarte D">D Ugarte</name></author><author><name sortKey="Cotta, M A" uniqKey="Cotta M">M A Cotta</name></author></titleStmt><publicationStmt><date when="2013">2013</date><idno type="doi">10.1021/nl302891b</idno><idno type="RBID">pubmed:23205668</idno><idno type="pmid">23205668</idno><idno type="wicri:Area/Main/Corpus">000914</idno><idno type="wicri:Area/Main/Curation">000914</idno><idno type="wicri:Area/Main/Exploration">000382</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We have observed that thin InP nanowires generated by vapor-liquid-solid growth display spontaneous periodic diameter oscillations when large group III supersaturations are used. Diameter variations are associated with a large number of stacking faults and crystallographic phase changes(wurtzite/zinc-blende); also the axial distance between oscillations depends on the indium precursor flow used during the run. We attribute the morphology changes to a substantial deformation of the triple phase line (vapor-liquid-solid) at the catalyst nanoparticle edge originated from multistep nucleation during growth. The deformation alters the mechanical force balance acting on the nanoparticle during growth in such a way that the particle displaces from the nanowire top and wets the nanowire sidewall. Subsequently, as catalytic growth occurs at the sidewall, the associated increase in diameter will eventually push the NP back to its original wire-top position until the onset of a new instability at the triple phase line.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">23205668</PMID><DateCreated><Year>2013</Year><Month>01</Month><Day>09</Day></DateCreated><DateCompleted><Year>2013</Year><Month>06</Month><Day>05</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1530-6992</ISSN><JournalIssue CitedMedium="Internet"><Volume>13</Volume><Issue>1</Issue><PubDate><Year>2013</Year><Month>Jan</Month><Day>9</Day></PubDate></JournalIssue><Title>Nano letters</Title><ISOAbbreviation>Nano Lett.</ISOAbbreviation></Journal><ArticleTitle>Spontaneous periodic diameter oscillations in InP nanowires: the role of interface instabilities.</ArticleTitle><Pagination><MedlinePgn>9-13</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1021/nl302891b</ELocationID><Abstract><AbstractText>We have observed that thin InP nanowires generated by vapor-liquid-solid growth display spontaneous periodic diameter oscillations when large group III supersaturations are used. Diameter variations are associated with a large number of stacking faults and crystallographic phase changes(wurtzite/zinc-blende); also the axial distance between oscillations depends on the indium precursor flow used during the run. We attribute the morphology changes to a substantial deformation of the triple phase line (vapor-liquid-solid) at the catalyst nanoparticle edge originated from multistep nucleation during growth. The deformation alters the mechanical force balance acting on the nanoparticle during growth in such a way that the particle displaces from the nanowire top and wets the nanowire sidewall. Subsequently, as catalytic growth occurs at the sidewall, the associated increase in diameter will eventually push the NP back to its original wire-top position until the onset of a new instability at the triple phase line.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Oliveira</LastName><ForeName>D S</ForeName><Initials>DS</Initials><Affiliation>Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, UNICAMP, 13083-859, Campinas, SP, Brazil.</Affiliation></Author><Author ValidYN="Y"><LastName>Tizei</LastName><ForeName>L H G</ForeName><Initials>LH</Initials></Author><Author ValidYN="Y"><LastName>Ugarte</LastName><ForeName>D</ForeName><Initials>D</Initials></Author><Author ValidYN="Y"><LastName>Cotta</LastName><ForeName>M A</ForeName><Initials>MA</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2012</Year><Month>12</Month><Day>06</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Nano Lett</MedlineTA><NlmUniqueID>101088070</NlmUniqueID><ISSNLinking>1530-6984</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="aheadofprint"><Year>2012</Year><Month>12</Month><Day>6</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2012</Year><Month>12</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2012</Year><Month>12</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2012</Year><Month>12</Month><Day>5</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1021/nl302891b</ArticleId><ArticleId IdType="pubmed">23205668</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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