Open-bandgap graphene-based field-effect transistor using oligo(phenylene-ethynylene) interfacial chemistry

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Title
Open-bandgap graphene-based field-effect transistor using oligo(phenylene-ethynylene) interfacial chemistry
Author(s)
Kyung Ho Kim; Sung Eun Seo; Chul Soon Park; Soomin Kim; Soohyun LeeChoong-Min Ryu; D Yong; Y M Park; Oh Seok Kwon
Bibliographic Citation
Angewandte Chemie-International Edition, vol. 61, pp. 202209726-202209726
Publication Year
2022
Abstract
Organic interfacial compounds (OICs) are required as linkers for the highly stable and efficient immobilization of bioprobes in nanobiosensors using 2D nanomaterials such as graphene. Herein, we first demonstrated the fabrication of a field-effect transistor (FET) via a microelectromechanical system process after covalent functionalization on large-scale graphene by introducing oligo(phenylene-ethynylene)amine (OPE). OPE was compared to various OICs by density functional theory simulations and was confirmed to have a higher binding energy with graphene and a lower band gap than other OICs. OPE can improve the immobilization efficiency of a bioprobe by forming a self-assembly monolayer via anion-based reaction. Using this technology, Magainin I-conjugated OGMFET (MOGMFET) showed a high sensitivity, high selectivity, with a limit of detection of 100 cfu mL-1 . These results indicate that the OPE OIC can be applied for stable and comfortable interfacing technology for biosensor fabrication.
ISSN
1433-7851
Publisher
Wiley
DOI
http://dx.doi.org/10.1002/anie.202209726
Type
Article
Appears in Collections:
Division of Research on National Challenges > Infectious Disease Research Center > 1. Journal Articles
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