Liquid-crystal-electrochromic-material interface: a p-n-like electro-optic junction.
Identifieur interne : 003751 ( Main/Exploration ); précédent : 003750; suivant : 003752Liquid-crystal-electrochromic-material interface: a p-n-like electro-optic junction.
Auteurs : RBID : pubmed:11461276Abstract
A liquid crystal (LC) cell has been made by using a standard sandwich configuration with one of the indium tin oxide (ITO) electrodes covered by a thin layer of tungsten trioxide (WO3). In this kind of cell optical polarization switching (observed under a crossed polarizer microscope) occurs for only one of the two polarities of an ac external applied electric field, while in the usual liquid crystal cells the electro-optic response does not depend on the sign of the field. The inhibiting switching configuration corresponds to anodic polarization of the tungsten trioxide film in which the deintercalation of cations occurs. Here we present the time behavior of charge and discharge for both the anodic and cathodic currents. A model based on charge carrier exchange between the ITO-WO3 and WO3-LC interfaces and also electrochemical processes is reported. Our model is also capable of explaining the electric and electro-optic asymmetric responses of the cell. Numerical calculations confirm the model.
PubMed: 11461276
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Liquid-crystal-electrochromic-material interface: a p-n-like electro-optic junction.</title><author><name sortKey="Alexe Ionescu, A L" uniqKey="Alexe Ionescu A">A L Alexe-Ionescu</name><affiliation wicri:level="1"><nlm:affiliation>Departamentul de Matematica si Fizica, Universitatea Politehnica din Bucuresti, Splaiul Independentei 313, Ro-77206 Bucharest, Romania.</nlm:affiliation><country xml:lang="fr">Roumanie</country><wicri:regionArea>Departamentul de Matematica si Fizica, Universitatea Politehnica din Bucuresti, Splaiul Independentei 313, Ro-77206 Bucharest</wicri:regionArea></affiliation></author><author><name sortKey="Ionescu, A T" uniqKey="Ionescu A">A T Ionescu</name></author><author><name sortKey="Scaramuzza, N" uniqKey="Scaramuzza N">N Scaramuzza</name></author><author><name sortKey="Strangi, G" uniqKey="Strangi G">G Strangi</name></author><author><name sortKey="Versace, C" uniqKey="Versace C">C Versace</name></author><author><name sortKey="Barbero, G" uniqKey="Barbero G">G Barbero</name></author><author><name sortKey="Bartolino, R" uniqKey="Bartolino R">R Bartolino</name></author></titleStmt><publicationStmt><date when="2001">2001</date><idno type="RBID">pubmed:11461276</idno><idno type="pmid">11461276</idno><idno type="wicri:Area/Main/Corpus">003965</idno><idno type="wicri:Area/Main/Curation">003965</idno><idno type="wicri:Area/Main/Exploration">003751</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A liquid crystal (LC) cell has been made by using a standard sandwich configuration with one of the indium tin oxide (ITO) electrodes covered by a thin layer of tungsten trioxide (WO3). In this kind of cell optical polarization switching (observed under a crossed polarizer microscope) occurs for only one of the two polarities of an ac external applied electric field, while in the usual liquid crystal cells the electro-optic response does not depend on the sign of the field. The inhibiting switching configuration corresponds to anodic polarization of the tungsten trioxide film in which the deintercalation of cations occurs. Here we present the time behavior of charge and discharge for both the anodic and cathodic currents. A model based on charge carrier exchange between the ITO-WO3 and WO3-LC interfaces and also electrochemical processes is reported. Our model is also capable of explaining the electric and electro-optic asymmetric responses of the cell. Numerical calculations confirm the model.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">11461276</PMID><DateCreated><Year>2001</Year><Month>07</Month><Day>19</Day></DateCreated><DateCompleted><Year>2004</Year><Month>08</Month><Day>09</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">1539-3755</ISSN><JournalIssue CitedMedium="Print"><Volume>64</Volume><Issue>1 Pt 1</Issue><PubDate><Year>2001</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Physical review. E, Statistical, nonlinear, and soft matter physics</Title><ISOAbbreviation>Phys Rev E Stat Nonlin Soft Matter Phys</ISOAbbreviation></Journal><ArticleTitle>Liquid-crystal-electrochromic-material interface: a p-n-like electro-optic junction.</ArticleTitle><Pagination><MedlinePgn>011708</MedlinePgn></Pagination><Abstract><AbstractText>A liquid crystal (LC) cell has been made by using a standard sandwich configuration with one of the indium tin oxide (ITO) electrodes covered by a thin layer of tungsten trioxide (WO3). In this kind of cell optical polarization switching (observed under a crossed polarizer microscope) occurs for only one of the two polarities of an ac external applied electric field, while in the usual liquid crystal cells the electro-optic response does not depend on the sign of the field. The inhibiting switching configuration corresponds to anodic polarization of the tungsten trioxide film in which the deintercalation of cations occurs. Here we present the time behavior of charge and discharge for both the anodic and cathodic currents. A model based on charge carrier exchange between the ITO-WO3 and WO3-LC interfaces and also electrochemical processes is reported. Our model is also capable of explaining the electric and electro-optic asymmetric responses of the cell. Numerical calculations confirm the model.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Alexe-Ionescu</LastName><ForeName>A L</ForeName><Initials>AL</Initials><Affiliation>Departamentul de Matematica si Fizica, Universitatea Politehnica din Bucuresti, Splaiul Independentei 313, Ro-77206 Bucharest, Romania.</Affiliation></Author><Author ValidYN="Y"><LastName>Ionescu</LastName><ForeName>A T</ForeName><Initials>AT</Initials></Author><Author ValidYN="Y"><LastName>Scaramuzza</LastName><ForeName>N</ForeName><Initials>N</Initials></Author><Author ValidYN="Y"><LastName>Strangi</LastName><ForeName>G</ForeName><Initials>G</Initials></Author><Author ValidYN="Y"><LastName>Versace</LastName><ForeName>C</ForeName><Initials>C</Initials></Author><Author ValidYN="Y"><LastName>Barbero</LastName><ForeName>G</ForeName><Initials>G</Initials></Author><Author ValidYN="Y"><LastName>Bartolino</LastName><ForeName>R</ForeName><Initials>R</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2001</Year><Month>06</Month><Day>27</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Phys Rev E Stat Nonlin Soft Matter Phys</MedlineTA><NlmUniqueID>101136452</NlmUniqueID><ISSNLinking>1539-3755</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2001</Year><Month>7</Month><Day>20</Day><Hour>10</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2001</Year><Month>7</Month><Day>20</Day><Hour>10</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="received"><Year>2000</Year><Month>Oct</Month><Day>3</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2001</Year><Month>Feb</Month><Day>9</Day></PubMedPubDate><PubMedPubDate PubStatus="aheadofprint"><Year>2001</Year><Month>Jun</Month><Day>27</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2001</Year><Month>7</Month><Day>20</Day><Hour>10</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">11461276</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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