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Detection Beyond Debye's Length with an Electrolyte‐Gated Organic Field‐Effect Transistor
Author(s) -
Palazzo Gerardo,
De Tullio Donato,
Magliulo Maria,
Mallardi Antonia,
Intranuovo Francesca,
Mulla Mohammad Yusuf,
Favia Pietro,
VikholmLundin Inger,
Torsi Luisa
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201403541
Subject(s) - transistor , electrolyte , materials science , field effect transistor , capacitance , debye length , field (mathematics) , channel (broadcasting) , biosensor , capacitive sensing , nanotechnology , optoelectronics , computer science , electrical engineering , physics , electrode , ion , telecommunications , voltage , quantum mechanics , mathematics , engineering , pure mathematics , operating system
Electrolyte‐gated organic field‐effect transistors are successfully used as biosensors to detect binding events occurring at distances from the transistor electronic channel that are much larger than the Debye length in highly concentrated solutions. The sensing mechanism is mainly capacitive and is due to the formation of Donnan's equilibria within the protein layer, leading to an extra capacitance ( C DON ) in series to the gating system.