Electrochemiluminescent pH sensor measured by the emission potential of TiO2 nanocrystals and its biosensing application.
Identifieur interne : 000197 ( Main/Exploration ); précédent : 000196; suivant : 000198Electrochemiluminescent pH sensor measured by the emission potential of TiO2 nanocrystals and its biosensing application.
Auteurs : RBID : pubmed:24802560Abstract
This work reports for the first time a potential-based nano-electrochemiluminescent (ECL) pH sensor, using anatase TiO2 nanocrystals (NCs) as the ECL probe. The first ECL peak potential of the TiO2 NCs shifted negatively with increasing pH, showing a linear range from -0.47 V (vs Ag/AgCl) at pH 3 to -1.06 V at pH 10. This phenomenon was attributed to the absorption of 'potential-determining ions' of OH(-) on the surface of TiO2 NCs, leading to larger impedance of the electron injection. Other common 'potential-determining ions', such as phosphate, induced a slight potential shift of 0.03 V at a concentration of 0.1 M. Using urease as an enzyme model, a urea biosensor was developed by the simultaneous modification of urease and TiO2 NCs on indium-tin oxide (ITO) electrodes. The biosensor, measured on the basis of the pH increase caused by the enzyme catalysis reaction, had a linear range of 0.01-2.0 mM, with a potential shift of 0.175 V. The as-prepared pH sensor, which has simple construction procedures and acceptable sensitivity and selectivity, may provide new avenues for the construction of ECL bioanalytical methodologies. Copyright © 2014 John Wiley & Sons, Ltd.
DOI: 10.1002/bio.2697
PubMed: 24802560
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Electrochemiluminescent pH sensor measured by the emission potential of TiO2 nanocrystals and its biosensing application.</title><author><name sortKey="Liu, Xuan" uniqKey="Liu X">Xuan Liu</name><affiliation wicri:level="1"><nlm:affiliation>Department of Clinical Laboratory, Second Affiliated Hospital of Southeast University, Nanjing, People's Republic of China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Department of Clinical Laboratory, Second Affiliated Hospital of Southeast University, Nanjing</wicri:regionArea></affiliation></author><author><name sortKey="Wang, Nianyue" uniqKey="Wang N">Nianyue Wang</name></author><author><name sortKey="Zhao, Wei" uniqKey="Zhao W">Wei Zhao</name></author><author><name sortKey="Jiang, Hui" uniqKey="Jiang H">Hui Jiang</name></author></titleStmt><publicationStmt><date when="2014">2014</date><idno type="doi">10.1002/bio.2697</idno><idno type="RBID">pubmed:24802560</idno><idno type="pmid">24802560</idno><idno type="wicri:Area/Main/Corpus">000015</idno><idno type="wicri:Area/Main/Curation">000015</idno><idno type="wicri:Area/Main/Exploration">000197</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This work reports for the first time a potential-based nano-electrochemiluminescent (ECL) pH sensor, using anatase TiO2 nanocrystals (NCs) as the ECL probe. The first ECL peak potential of the TiO2 NCs shifted negatively with increasing pH, showing a linear range from -0.47 V (vs Ag/AgCl) at pH 3 to -1.06 V at pH 10. This phenomenon was attributed to the absorption of 'potential-determining ions' of OH(-) on the surface of TiO2 NCs, leading to larger impedance of the electron injection. Other common 'potential-determining ions', such as phosphate, induced a slight potential shift of 0.03 V at a concentration of 0.1 M. Using urease as an enzyme model, a urea biosensor was developed by the simultaneous modification of urease and TiO2 NCs on indium-tin oxide (ITO) electrodes. The biosensor, measured on the basis of the pH increase caused by the enzyme catalysis reaction, had a linear range of 0.01-2.0 mM, with a potential shift of 0.175 V. The as-prepared pH sensor, which has simple construction procedures and acceptable sensitivity and selectivity, may provide new avenues for the construction of ECL bioanalytical methodologies. Copyright © 2014 John Wiley & Sons, Ltd.</div></front></TEI><pubmed><MedlineCitation Status="Publisher" Owner="NLM"><PMID Version="1">24802560</PMID><DateCreated><Year>2014</Year><Month>5</Month><Day>7</Day></DateCreated><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1522-7243</ISSN><JournalIssue CitedMedium="Internet"><PubDate><Year>2014</Year><Month>May</Month><Day>7</Day></PubDate></JournalIssue><Title>Luminescence : the journal of biological and chemical luminescence</Title><ISOAbbreviation>Luminescence</ISOAbbreviation></Journal><ArticleTitle>Electrochemiluminescent pH sensor measured by the emission potential of TiO2 nanocrystals and its biosensing application.</ArticleTitle><Pagination><MedlinePgn></MedlinePgn></Pagination><ELocationID EIdType="doi">10.1002/bio.2697</ELocationID><Abstract><AbstractText NlmCategory="UNLABELLED">This work reports for the first time a potential-based nano-electrochemiluminescent (ECL) pH sensor, using anatase TiO2 nanocrystals (NCs) as the ECL probe. The first ECL peak potential of the TiO2 NCs shifted negatively with increasing pH, showing a linear range from -0.47 V (vs Ag/AgCl) at pH 3 to -1.06 V at pH 10. This phenomenon was attributed to the absorption of 'potential-determining ions' of OH(-) on the surface of TiO2 NCs, leading to larger impedance of the electron injection. Other common 'potential-determining ions', such as phosphate, induced a slight potential shift of 0.03 V at a concentration of 0.1 M. Using urease as an enzyme model, a urea biosensor was developed by the simultaneous modification of urease and TiO2 NCs on indium-tin oxide (ITO) electrodes. The biosensor, measured on the basis of the pH increase caused by the enzyme catalysis reaction, had a linear range of 0.01-2.0 mM, with a potential shift of 0.175 V. The as-prepared pH sensor, which has simple construction procedures and acceptable sensitivity and selectivity, may provide new avenues for the construction of ECL bioanalytical methodologies. Copyright © 2014 John Wiley & Sons, Ltd.</AbstractText><CopyrightInformation>Copyright © 2014 John Wiley & Sons, Ltd.</CopyrightInformation></Abstract><AuthorList><Author><LastName>Liu</LastName><ForeName>Xuan</ForeName><Initials>X</Initials><Affiliation>Department of Clinical Laboratory, Second Affiliated Hospital of Southeast University, Nanjing, People's Republic of China.</Affiliation></Author><Author><LastName>Wang</LastName><ForeName>Nianyue</ForeName><Initials>N</Initials></Author><Author><LastName>Zhao</LastName><ForeName>Wei</ForeName><Initials>W</Initials></Author><Author><LastName>Jiang</LastName><ForeName>Hui</ForeName><Initials>H</Initials></Author></AuthorList><Language>ENG</Language><PublicationTypeList><PublicationType>JOURNAL ARTICLE</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>5</Month><Day>7</Day></ArticleDate></Article><MedlineJournalInfo><MedlineTA>Luminescence</MedlineTA><NlmUniqueID>100889025</NlmUniqueID><ISSNLinking>1522-7235</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">TiO2 nanocrystals</Keyword><Keyword MajorTopicYN="N">bioanalysis</Keyword><Keyword MajorTopicYN="N">electrochemiluminescence (ECL)</Keyword><Keyword MajorTopicYN="N">pH sensor</Keyword><Keyword MajorTopicYN="N">potential</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2014</Year><Month>2</Month><Day>10</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2014</Year><Month>3</Month><Day>25</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2014</Year><Month>4</Month><Day>2</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>5</Month><Day>8</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>5</Month><Day>8</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>5</Month><Day>8</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>aheadofprint</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1002/bio.2697</ArticleId><ArticleId IdType="pubmed">24802560</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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