Phenol biosensor based on hydrogel microarrays entrapping tyrosinase and quantum dots

Eunji Jang, Kyung Jin Son, Bumsang Kim, Won-Gun Koh

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

This paper describes the use of microarray-based biosensor system for the determination of phenol. Microarrays based on poly(ethylene glycol)(PEG) hydrogel were prepared by photopatterning of a solution containing PEG diacrylate (PEG-DA), photoinitiator, tyrosinase, and CdSe/ZnS quantum dots (QDs). During photo-induced crosslinking, tyrosinase and QDs were entrapped within the hydrogel microarrays, making the hydrogel microarray fluorescent and responsive to phenol. The entrapped tyrosinase could carry out enzyme-catalyzed oxidation of phenol to produce quinones, which subsequently quenched the fluorescence of QDs within hydrogel microarray. The fluorescence intensity of the hydrogel microarrays decreased linearly according to phenol concentration and the detection limit of this system was found to be 1.0 μM. The microarray system presented in this study could be combined with a microfluidic device as an initial step to create a phenol-detecting "micro-total-analysis-system (μ-TAS)".

Original languageEnglish
Pages (from-to)2871-2878
Number of pages8
JournalAnalyst
Volume135
Issue number11
DOIs
Publication statusPublished - 2010 Nov 1

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Quantum Dots
Monophenol Monooxygenase
Hydrogel
Biosensing Techniques
Microarrays
Phenol
Biosensors
Hydrogels
Semiconductor quantum dots
Phenols
phenol
Lab-On-A-Chip Devices
Polyethylene glycols
fluorescence
Fluorescence
Quinones
Ethylene Glycol
systems analysis
ethylene
Limit of Detection

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Spectroscopy
  • Electrochemistry
  • Biochemistry
  • Environmental Chemistry

Cite this

Jang, Eunji ; Son, Kyung Jin ; Kim, Bumsang ; Koh, Won-Gun. / Phenol biosensor based on hydrogel microarrays entrapping tyrosinase and quantum dots. In: Analyst. 2010 ; Vol. 135, No. 11. pp. 2871-2878.
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Phenol biosensor based on hydrogel microarrays entrapping tyrosinase and quantum dots. / Jang, Eunji; Son, Kyung Jin; Kim, Bumsang; Koh, Won-Gun.

In: Analyst, Vol. 135, No. 11, 01.11.2010, p. 2871-2878.

Research output: Contribution to journalArticle

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