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IJAT Vol.12 No.1 pp. 37-44
doi: 10.20965/ijat.2018.p0037
(2018)

Review:

On-Chip FRET Graphene Aptasensor

Yuko Ueno*,† and Kazuaki Furukawa**

*NTT Basic Research Laboratories, NTT Corporation
3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan

Corresponding author

**Meisei University, Tokyo, Japan

Received:
May 23, 2017
Accepted:
November 23, 2017
Published:
January 5, 2018
Keywords:
graphene, aptamer, biosensor, microchannel, fluorescence resonance energy transfer
Abstract

We review the recent advances in the use of our originally developed on-chip graphene aptasensor to detect biologically important proteins, such as cancer markers. The detection mechanism, based on fluorescence resonance energy transfer (FRET), occurs at a graphene–biomolecule interface. In our system, the graphene surface is modified with a pyrene–aptamer–dye probe. Pyrene functions as a linker to the graphene surface, the aptamer as a probe for selective protein recognition, and the dye as a fluorescence detection tag. Here, graphene behaves simultaneously as both an efficient acceptor for FRET over the entire visible region and as a strong adsorbate for single-stranded DNA (ssDNA), such as aptamers, via π-π interactions in the sp2 domain. The system allows us to perform molecular detection on a solid surface, which is advantageous for realizing on-chip sensors. Such on-chip sensors allow parallel analysis systems, such as array sensors. This enables the quantitative comparison of different samples by forming a multichannel configuration and/or a micropattern with different probes. Moreover, detecting the target protein is possible simply by adding a sample of less than 1 μL to the on-chip sensor; detection is completed in approximately 1 min. Aptasensors can be used for the detection of many different targets simply by replacing the aptamers. The simultaneous detection of multiple target molecules on a single chip using a 2 × 3 linear-array aptasensor was demonstrated here. Improved sensitivity was observed when a DNA spacer was incorporated into the aptamer, demonstrating that the probe can be modified in interesting ways.

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Cite this article as:
Yuko Ueno and Kazuaki Furukawa, “On-Chip FRET Graphene Aptasensor,” Int. J. Automation Technol., Vol.12, No.1, pp. 37-44, 2018
Yuko Ueno and Kazuaki Furukawa, Int. J. Automation Technol., Vol.12, No.1, pp. 37-44, 2018

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Last updated on Jun. 22, 2018