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DALIAN UNIVERSITY OF TECHNOLOGY Login 中文
常洋洋

Associate Professor
Supervisor of Master's Candidates


Gender:Female
Alma Mater:中国科学院生态环境研究中心
Degree:Doctoral Degree
School/Department:环境学院
Discipline:Environmental Science. Environmental Engineering
Business Address:环境楼B507
E-Mail:yychang@dlut.edu.cn
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Current position: Home >> Scientific Research >> Paper Publications

Fluorescent assay for oxytetracycline based on a long-chain aptamer assembled onto reduced graphene oxide

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Indexed by:期刊论文

Date of Publication:2013-07-01

Journal:MICROCHIMICA ACTA

Included Journals:SCIE、Scopus

Volume:180

Issue:9-10

Page Number:829-835

ISSN No.:0026-3672

Key Words:Long-chain aptamer; Oxytetracycline; Fluorescent assay; Graphene

Abstract:We report on a fluorescent assay for oxytetracycline (OTC) using a fluorescein-labeled long-chain aptamer assembled onto reduced graphene oxide (rGO). The pi-pi stacking interaction between aptamer and rGO causes the fluorescence of the label to be almost completely quenched via energy transfer so that the system has very low background fluorescence. The addition of OTC leads to the formation of G-quadruplex OTC complexes and prevents the adsorption of labeled aptamer on the surface of rGO. As a result, fluorescence is restored, and this effect allows for a quantitative assay of OTC over the 0.1-2 mu M concentration range and with a detection limit of 10 nM. This method is simple, rapid, selective and sensitive. It may be applied to other small molecule analytes by applying appropriate aptamers.