Organic field-effect transistors as a test-bed for molecular electronics: A combined study with large-area molecular junctions

Asadi, Kamal; Katsouras, Ilias; Harkema, Jan; Gholamrezaie, Fatemeh; Smits, Edsger C. F.; Biscarini, Fabio; Blom, Paul W. M.; Leeuw, Dago M. de

doi:10.1016/j.orgel.2012.07.012

Cited by 20 publications

(10 citation statements)

References 56 publications

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“…Also the charge carrier injection/extraction interface between semiconductor and source or drain electrodes plays an important role in OFET response. 31,32 If there is a mismatch in energetic transport levels (due to chemical, structural or morphological disorder) the OFET exhibits contact resistance and non-ohmic response.…”

Section: Organic Field Effect Transistors As Interfacial Sensor Devicesmentioning

confidence: 99%

Water-gated organic field effect transistors – opportunities for biochemical sensing and extracellular signal transduction

et al. 2013

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There is a quest for electronic biosensors operated in water for biomedical applications and environmental monitoring. Water is an aggressive medium for standard electronics materials and devices due to its strong polarizability and electrochemical activity. Thick dielectric encapsulation provides necessary stability while it damps the sensitivity of the device to sensing events occurring in the aqueous environment. Organic electronics provides materials that exhibit stable electronic conduction in direct contact with water combined with other desirable properties like mechanical softness, biocompatibility and processability onto flexible substrates. In this review, we introduce an emerging class of organic transistors, in which the current across the organic film is gated by the electric field of the Debye–Helmholtz layer. We discuss the device physics, the sensing mechanism and the relevant electrochemical processes. Applications of water-gated transistors range from the sensing of biologically relevant molecules like DNA, proteins or hormones to non-invasive recording and stimulation of electrical activity of neurons. Materials chemistry is crucial to control properties of electrically active films and to allow the introduction of specific chemical functionalities and receptors at sensing interfaces of the device

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Section: Organic Field Effect Transistors As Interfacial Sensor Devicesmentioning

confidence: 99%

Water-gated organic field effect transistors – opportunities for biochemical sensing and extracellular signal transduction

et al. 2013

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“…Indeed monolayers of saturated molecules with lengths greater than ~2 nm have proved to be remarkably effective gate insulators in organic transistors when used in conjunction with a nano-thickness inorganic dielectric layer 10 , 11 . Conversely, saturated small molecules with lengths <1 nm have been widely used in organic electronics to tune the interfacial energetics and surface energy at the electrode/organic semiconductor interface in organic light-emitting diodes 12 , organic photovoltaics 13 – 15 and transistors 16 , without significantly adding to device series resistance. Solution processable organic semiconductors such as poly(3-hexylthiophene-2,5-diyl) and phenyl-C 61 -butyric acid methyl ester also tolerate insulating molecular chains of 3–6 CH 2 units attached to the conjugated core.…”

Section: Introductionmentioning

confidence: 99%

Retarding oxidation of copper nanoparticles without electrical isolation and the size dependence of work function

et al. 2017

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Copper nanoparticles (CuNPs) are attractive as a low-cost alternative to their gold and silver analogues for numerous applications, although their potential has hardly been explored due to their higher susceptibility to oxidation in air. Here we show the unexpected findings of an investigation into the correlation between the air-stability of CuNPs and the structure of the thiolate capping ligand; of the eight different ligands screened, those with the shortest alkyl chain, –(CH2)2–, and a hydrophilic carboxylic acid end group are found to be the most effective at retarding oxidation in air. We also show that CuNPs are not etched by thiol solutions as previously reported, and address the important fundamental question of how the work function of small supported metal particles scales with particle size. Together these findings set the stage for greater utility of CuNPs for emerging electronic applications.

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“…Pentacene and MEH-PPV channels were studied in combination with a variety of SAMs. [125][126][127] Stoliar et al observed that the odd-even effects in charge carrier mobility, m, in OFETs was governed by the number of carbon atoms in the SAM present at the electrodeÀchan-nel interface as well as values of b indicative of tunneling through a SAM. [125] Casalini et al observed that the SAM-functionalized electrodes in the OFET behaved as a "normal" molecular junction, suggesting OFETs as tool for studying the charge injection through SAMs.…”

Section: Conjugated Polymer Contactsmentioning

confidence: 99%

“…[138] For a discussion of nanoskiving for applications other than ME, we direct the reader to a recent review. [127] The key step of nanoskiving is mechanical, making it compatible with soft materials, such as conjugated polymers, that would not survive conventional photolithography. [139,140] By co-embedding nickel within the slabs, the sections can be placed and oriented magnetically.…”

Section: Nanoskivingmentioning

confidence: 99%

Bottom‐Up Molecular Tunneling Junctions Formed by Self‐Assembly

Zhang¹,

Zhao²,

Fracasso³

et al. 2014

Israel Journal of Chemistry

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This Minireview focuses on bottom‐up molecular tunneling junctions – a fundamental component of molecular electronics – that are formed by self‐assembly. These junctions are part of devices that, in part, fabricate themselves, and therefore, are particularly dependent on the chemistry of the molecules selected. The discussion covers the history of these junctions as well as recent advances. It is broken into the broad categories of conformal and rigid contacts, which place different constraints on the molecules used to form the junctions. The intention of this Minireview is to give an overview of research efforts in molecular electronics that is targeted at chemists, whose efforts are playing an increasingly important role in molecular electronics.

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Organic field-effect transistors as a test-bed for molecular electronics: A combined study with large-area molecular junctions

Cited by 20 publications

References 56 publications

Water-gated organic field effect transistors – opportunities for biochemical sensing and extracellular signal transduction

Water-gated organic field effect transistors – opportunities for biochemical sensing and extracellular signal transduction

Retarding oxidation of copper nanoparticles without electrical isolation and the size dependence of work function

Bottom‐Up Molecular Tunneling Junctions Formed by Self‐Assembly

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