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Detection of bisphenol A using palm-size NanoAptamer analyzer

Authors
Lim, Hyun JeongChua, BeeleeSon, Ahjeong
Issue Date
15-8월-2017
Publisher
ELSEVIER ADVANCED TECHNOLOGY
Keywords
NanoAptamer analyzer; Bisphenol A (BPA); Magnetic bead; Quantum dots; Aptamer; Fluorescence measurement
Citation
BIOSENSORS & BIOELECTRONICS, v.94, pp.10 - 18
Indexed
SCIE
SCOPUS
Journal Title
BIOSENSORS & BIOELECTRONICS
Volume
94
Start Page
10
End Page
18
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/82555
DOI
10.1016/j.bios.2017.02.029
ISSN
0956-5663
Abstract
We have demonstrated a palm-size NanoAptamer analyzer capable of detecting bisphenol A (BPA) at environmentally relevant concentrations (< 1 ng/mL or ppb). It is designed for performing reaction and fluorescence measurement on single cuvette sample. Modified NanoGene assay was used as the sensing mechanism where signaling DNA and QD(655) was tethered to QD(565) and magnetic bead via the aptamer. Aptamer affinity with BPA resulted in the release of the signaling DNA and QD(655) from the complex and hence corresponding decrease in QD(655) fluorescence measurement signal. Baseline characterization was first performed with empty cuvettes, quantum dots and magnetic beads under near-ideal conditions to establish essential functionality of the NanoAptamer analyzer. Duration of incubation time, number of rinse cycles, and necessity of cuvette vibration were also investigated. In order to demonstrate the capability of the NanoAptamer analyzer to detect BPA, samples with BPA concentrations ranging from 0.0005 to 1.0 ng/mL (ppb) were used. The performance of the NanoAptamer analyzer was further examined by using laboratory protocol and commercial spectrofluorometer as reference. Correlation between NanoAptamer analyzer and laboratory protocol as well as commercial spectrofluorometer was evaluated via correlation plots and correlation coefficients.
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Chua, Beelee
공과대학 (전기전자공학부)
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