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Baek, Jong-Beom
Center for Dimension-Controllable Organic Frameworks
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dc.citation.startPage 115628 -
dc.citation.title JOURNAL OF ELECTROANALYTICAL CHEMISTRY -
dc.citation.volume 898 -
dc.contributor.author Rahman, Md. Mahbubur -
dc.contributor.author Liu, Dongtao -
dc.contributor.author Lopa, Nasrin Siraj -
dc.contributor.author Baek, Jong-Beom -
dc.contributor.author Nam, Chang-Hoon -
dc.contributor.author Lee, Jae-Joon -
dc.date.accessioned 2023-12-21T15:11:39Z -
dc.date.available 2023-12-21T15:11:39Z -
dc.date.created 2021-10-07 -
dc.date.issued 2021-10 -
dc.description.abstract Sensitive and selective detection of dopamine (DA) is important for the early diagnosis of diseases associated with abnormal DA levels. This study investigated the effect of the degree of carboxyl (-COOH) functional groups at the edges of graphene on the signal sensitivity of electrochemical DA detection in the presence of ascorbic acid (AA) and uric acid (UA). We prepared edge carboxylated graphene (ECG) nanoplatelets with a high proportion of oxygen functional groups (26.40%) and heat-treated ECG (HECG) with a low proportion of oxygen functional groups (2.35%), which were used to modify a fluorine-doped fin oxide (FTO) electrodes through the electrospray method. The ECG/FTO electrode showed excellent catalytic activity in separating AA, DA, and UA signals, potentially owing to the strong chemical interactions of these analyzes with -COOH groups of ECG. While the HECG/FTO electrode displayed the oxidation signals suppression of AA and UA from those of DA signals with low sensitivity; this can be ascribed to decreased chemical interactions of these analyzes with HECG induced by the low proportion of -COOH functional groups. Concurrently, the ECG/FTO sensor showed high sensitivity (ca. 2.11 mu A/cm(2)/mu M) and low detection limit (ca. 0.26 mu M) for DA detection in the presence of AA and UA, while it was ca. 0.55 mu A/cm(2)/04 and 1.0 mu M, respectively, for the HECG/FTO sensor. These results suggest that the dense distribution of oxygen functional groups at the edges of graphene plays a vital role in ensuring high sensitivity and a low limit of DA detection. -
dc.identifier.bibliographicCitation JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v.898, pp.115628 -
dc.identifier.doi 10.1016/j.jelechem.2021.115628 -
dc.identifier.issn 1572-6657 -
dc.identifier.scopusid 2-s2.0-85113584223 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/54112 -
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S1572665721006548?via%3Dihub -
dc.identifier.wosid 000696714400011 -
dc.language 영어 -
dc.publisher ELSEVIER SCIENCE SA -
dc.title Effect of the carboxyl functional group at the edges of graphene on the signal sensitivity of dopamine detection -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Analytical; Electrochemistry -
dc.relation.journalResearchArea Chemistry; Electrochemistry -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor Edge-carboxylated graphene -
dc.subject.keywordAuthor Heat-treated edge-carboxylated graphene -
dc.subject.keywordAuthor Electrospray -
dc.subject.keywordAuthor Interaction mechanism -
dc.subject.keywordAuthor Dopamine -
dc.subject.keywordPlus URIC-ACID -
dc.subject.keywordPlus ELECTROCHEMICAL DETECTION -
dc.subject.keywordPlus ASCORBIC-ACID -
dc.subject.keywordPlus SELECTIVE DETECTION -
dc.subject.keywordPlus OXIDE -
dc.subject.keywordPlus ELECTRODE -
dc.subject.keywordPlus SENSOR -
dc.subject.keywordPlus FACILE -
dc.subject.keywordPlus NANOPARTICLES -
dc.subject.keywordPlus NANOSHEETS -

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