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DC Field | Value | Language |
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dc.citation.endPage | 5336 | - |
dc.citation.number | 9 | - |
dc.citation.startPage | 5327 | - |
dc.citation.title | ACS APPLIED NANO MATERIALS | - |
dc.citation.volume | 1 | - |
dc.contributor.author | Lee, Kwan | - |
dc.contributor.author | Nojoomi, Amirali | - |
dc.contributor.author | Jeon, Junha | - |
dc.contributor.author | Lee, Chang Young | - |
dc.contributor.author | Yum, Kyungsuk | - |
dc.date.accessioned | 2023-12-21T20:12:14Z | - |
dc.date.available | 2023-12-21T20:12:14Z | - |
dc.date.created | 2019-01-07 | - |
dc.date.issued | 2018-09 | - |
dc.description.abstract | Selective modulation of near-infrared (NIR) fluorescence of single-walled carbon nanotubes (SWNTs) is important for their applications as NIR optical sensors and devices. Here, we study the target-molecule-mediated NIR fluorescence modulation of refolded DNA aptamer-functionalized SWNTs, using platelet-derived growth factor (PDGF) and a PDGF-binding aptamer as a model system. The aptamer-SWNT complexes use SWNT as nanoscale NIR optical emitters and DNA aptamers as molecular recognition elements. The binding of target molecules, PDGFs in this study, to PDGF-binding aptamers on the surface of SWNTs induces a conformation change of the aptamers, which modulates the NIR fluorescence of SWNT emitters. This study suggests that PDGF-binding aptamers noncovalently assembled on the SWNT surface can undergo a temperature- and divalent-ion-induced conformational change into a folded structure through multiple stages, which renders aptamer-functionalized SWNTs optically responsive to target molecules. In addition, our experimental and theoretical results show that the aptamers have a nanotube-diameter-dependent affinity for SWNTs. We demonstrate that refolded aptamer-functionalized SWNTs reversibly modulate their NIR fluorescence in response to PDGF at the nanomolar range 0.1-10 nM with apparent dissociation constants of ∼0.71 nM (solution-phase complexes) and ∼3.1 nM (complexes in hydrogels). This study could open new opportunities to design label-free, reversible NIR optical sensors that can detect various target molecules upon availability or selection of their cognate aptamers. | - |
dc.identifier.bibliographicCitation | ACS APPLIED NANO MATERIALS, v.1, no.9, pp.5327 - 5336 | - |
dc.identifier.doi | 10.1021/acsanm.8b01377 | - |
dc.identifier.issn | 2574-0970 | - |
dc.identifier.scopusid | 2-s2.0-85066451683 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/25584 | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/acsanm.8b01377 | - |
dc.identifier.wosid | 000461401000099 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Near-Infrared Fluorescence Modulation of Refolded DNA Aptamer-Functionalized Single-Walled Carbon Nanotubes for Optical Sensing | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | single-walled carbon nanotubes | - |
dc.subject.keywordAuthor | aptamers | - |
dc.subject.keywordAuthor | DNA | - |
dc.subject.keywordAuthor | near-infrared fluorescence | - |
dc.subject.keywordAuthor | optical nanosensors | - |
dc.subject.keywordAuthor | platelet-derived growth factor | - |
dc.subject.keywordPlus | PHASE MOLECULAR RECOGNITION | - |
dc.subject.keywordPlus | BAND-GAP FLUORESCENCE | - |
dc.subject.keywordPlus | CONFORMATIONAL POLYMORPHISM | - |
dc.subject.keywordPlus | BINDING | - |
dc.subject.keywordPlus | DEPENDENCE | - |
dc.subject.keywordPlus | LUMINESCENCE | - |
dc.subject.keywordPlus | SELECTIVITY | - |
dc.subject.keywordPlus | COMPLEXES | - |
dc.subject.keywordPlus | SENSORS | - |
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