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

Abstract : 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.
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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, IOPScience - Japan Society of Applied Physics, 2020, 13 (1), pp.011005. ⟨10.7567/1882-0786/ab5322⟩. ⟨hal-02405294⟩

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