Double layer capacitance measured by organic field effect transistor operated in water

Cramer, Tobias; Kyndiah, Adrica; Murgia, Mauro; Leonardi, Francesca; Casalini, Stefano; Biscarini, Fabio

doi:10.1063/1.3699218

Cited by 74 publications

(81 citation statements)

References 30 publications

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“…This layer accounts for the very high-gate capacitance, which is in the order of mF cm À 2 (ref. 38). The hysteresis is less pronounced in a higher ionic solution ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Highly stable organic polymer field-effect transistor sensor for selective detection in the marine environment

et al. 2014

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In recent decades, the susceptibility to degradation in both ambient and aqueous environments has prevented organic electronics from gaining rapid traction for sensing applications. Here we report an organic field-effect transistor sensor that overcomes this barrier using a solution-processable isoindigo-based polymer semiconductor. More importantly, these organic field-effect transistor sensors are stable in both freshwater and seawater environments over extended periods of time. The organic field-effect transistor sensors are further capable of selectively sensing heavy-metal ions in seawater. This discovery has potential for inexpensive, ink-jet printed, and large-scale environmental monitoring devices that can be deployed in areas once thought of as beyond the scope of organic materials.

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“…This layer accounts for the very high-gate capacitance, which is in the order of mF cm À 2 (ref. 38). The hysteresis is less pronounced in a higher ionic solution ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Highly stable organic polymer field-effect transistor sensor for selective detection in the marine environment

et al. 2014

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“…Schließlich bilden sich Ladungsdoppelschichten (CDLs,"charge double layers") an der Gate-Elektrolyt-Grenzfläche und der Elektrolyt-HalbleiterGrenzfläche,d ie in Abbildung 6a mit C CDL-1 bzw.C CDL-2 bezeichnet sind und Kapazitäten bis zu 14.6 mFcm À2 in 0.1m Kochsalzlçsung aufweisen. [66] Kapazitätswerte bis zu einigen hundert mFcm À2 kçnnen mit ionischen Flüssigkeiten und polymeren Elektrolyten wegen der viel hçheren Ionenkonzentrationen erzielt werden. [67] Die beiden CDL-Kondensatoren in Reihe,d ie in Abbildung 6a angegeben sind, bilden das EG-TFT-Ansteuerungssystem, da die Kapazitätskopp-lung zwischen den CDLs und dem Halbleiter einen zweidimensionalen (2D) Kanal freier Ladungen im Halbleiter erzeugt.…”

Section: Druckbare Bioelektronische Elektrolytgesteuerte Dünnschichttunclassified

Druckbare Bioelektronik zur Untersuchung funktioneller biologischer Grenzflächen

et al. 2015

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Dünnschichttransistoren können als bioelektronische Bauelemente genutzt werden, um solche Aufgaben auszuführen wie Erkennung oder Steuerung der Freisetzung biologischer Spezies sowie Umwandlung der elektrischen Aktivität von Zellen oder sogar Organen wie des Gehirns. Organische Materialien sowie Graphen oder Zinkoxid werden als druckbare Halbleiterschicht eingesetzt, was zu leistungsfähigen kostengünstigen bioelektronischen Sensoreinheiten führen kann, die möglicherweise sehr nützlich für Vor‐Ort‐Anwendungen sind. Von Interesse sind unter anderem die elektrolytgesteuerten Transistoren, da sie aufgrund der hohen Kapazität der Ladungsdoppelschichten als kapazitätsmodulierte Bauelemente betrieben werden können. Speziell die Kapazität der Bioschicht, die in einer Reihe von Kondensatoren geringer ist, beeinflusst den Ausgangsstrom des Bauelementes. Solch ein Phänomen ermöglicht eine äußerst hohe Empfindlichkeit gegen sehr schwache Wechselwirkungen. Sämtliche Aspekte, die diese Vorgänge bestimmen, werden besprochen.

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“…Similarly to OECT technology, electrolyte-gated organic field-effect transistors (EGOFETs)-also known as water-gated OFETs-are worth mentioning. EGOFETs can operate either with pure water or saline solutions as gate medium and they can be fabricated using many different semiconductors (both p-and n-type) [47,[131][132][133]. Such transistors are characterized by currents that are much smaller than the OECT counterpart [134,135].…”

Section: Organic Field-effect Transistorsmentioning

confidence: 99%

Flexible and Organic Neural Interfaces: A Review

Lago

Cester

2017

Applied Sciences

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Featured Application: Authors are encouraged to provide a concise description of the specific application or a potential application of the work. This section is not mandatory.Abstract: Neural interfaces are a fundamental tool to interact with neurons and to study neural networks by transducing cellular signals into electronics signals and vice versa. State-of-the-art technologies allow both in vivo and in vitro recording of neural activity. However, they are mainly made of stiff inorganic materials that can limit the long-term stability of the implant due to infection and/or glial scars formation. In the last decade, organic electronics is digging its way in the field of bioelectronics and researchers started to develop neural interfaces based on organic semiconductors, creating more flexible and conformable neural interfaces that can be intrinsically biocompatible. In this manuscript, we are going to review the latest achievements in flexible and organic neural interfaces for the recording of neuronal activity.

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Double layer capacitance measured by organic field effect transistor operated in water

Cited by 74 publications

References 30 publications

Highly stable organic polymer field-effect transistor sensor for selective detection in the marine environment

Highly stable organic polymer field-effect transistor sensor for selective detection in the marine environment

Druckbare Bioelektronik zur Untersuchung funktioneller biologischer Grenzflächen

Flexible and Organic Neural Interfaces: A Review

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