Open-Bandgap Graphene-Based Field-Effect Transistor Using Oligo(phenylene-ethynylene) Interfacial Chemistry

Kyung Ho Kim, Sung Eun Seo, Chul Soon Park, Soomin Kim, Soohyun Lee, Choong Min Ryu, Dongeun Yong, Yoo Min Park, Oh Seok Kwon

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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.

Original languageEnglish
JournalAngewandte Chemie - International Edition
Publication statusPublished - 2022 Oct 10

Bibliographical note

Publisher Copyright:
© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

  • Catalysis
  • General Chemistry


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