Electrolyte-gated-organic field effect transistors functionalized by lipid monolayers with tunable pH sensitivity for sensor applications

Tin Phan Nguy (1, 2) , Ryoma Hayakawa (1) , Volkan Kilinc (3, 4) , Matthieu Petit (3, 4) , Yemineni S L V Narayana (5) , Masayoshi Higuchi (5) , Jean-Manuel Raimundo (4, 3) , Anne Charrier (4) , Yutaka Wakayama (1, 2)

1 WPI-MANA - International Center for Materials Nanoarchitectonics
2 Department of Chemistry and Biochemistry, Faculty of Engineering, Kyushu University
3 AMU - Aix Marseille Université
4 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille
5 NIMS - National Institute for Materials Science

Electrolyte-gated organic field effect transistors (EG-OFETs) functionalized by engineered lipid monolayers (LMLs) are investigated to tune pH sensitivity for sensor application. The EG-OFET functionalized by OH-terminated LML shows linear dependence on the physiological pH range (4-8). Meanwhile, the LML with polar-head groups presents limited pH sensitivity only in a certain pH range. In contrast, the methyltrichlorosilane (MTS) passivation of the LML head-group makes the EG-OFET non sensitive in a broad pH range (1.68-12). These findings suggest that our proposed transistors have the potential to construct versatile sensor applications with the controllable pH sensitivity.

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matière Molle [cond-mat.soft]

Tin Phan Nguy, Ryoma Hayakawa, Volkan Kilinc, Matthieu Petit, Yemineni S L V Narayana, et al.. Electrolyte-gated-organic field effect transistors functionalized by lipid monolayers with tunable pH sensitivity for sensor applications. Applied Physics Express, 2020, 13 (1), pp.011005. ⟨10.7567/1882-0786/ab5322⟩. ⟨hal-02405294⟩