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Dissertations / Theses on the topic 'Electrolyte gated transistors'

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1

Herlogsson, Lars. "Electrolyte-Gated Organic Thin-Film Transistors." Doctoral thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69636.

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There has been a remarkable progress in the development of organic electronic materials since the discovery of conducting polymers more than three decades ago. Many of these materials can be processed from solution, in the form as inks. This allows for using traditional high-volume printing techniques for manufacturing of organic electronic devices on various flexible surfaces at low cost. Many of the envisioned applications will use printed batteries, organic solar cells or electromagnetic coupling for powering. This requires that the included devices are power efficient and can operate at lo
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2

Algarni, Saud. "Electrolyte-gated thin film transistors for sensor applications." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/15809/.

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3

Mackin, Charles Edward. "Electrolyte-gated graphene field-effect transistors : modeling and applications." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/97815.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, February 2015.<br>Cataloged from PDF version of thesis. "February 2015."<br>Includes bibliographical references.<br>This work presents a model for electrolyte-gated graphene field-effect transistors (EGFETs) that incorporates the effects of the double layer capacitance and the quantum capacitance of graphene. The model is validated through experimental graphene EGFETs, which were fabricated and measured to provide experimental data and extract graphene EGFET parameters such as mobili
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4

Al, Naim Abdullah. "Electrolyte-gated thin film transistors with solution-processed semiconductors." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/6551/.

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The work in this thesis is concentrated on studies of improving the functionality of electrolyte- gated thin film transistors with solution- processed semiconductors in order to provide a promising platform in particular for sensor as transducers and introduce sensitizer layer on the top of the devices to improve their response to specific analytes. Calixarenes, a family of organic macrocycles, were used to bind selectively to waterborne cations, making them an attractive sensitizer option for such species. Here, it is found that calixarenes deposited over the surface of semiconductors using t
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5

Althagafi, Talal. "Solution processed electrolyte-gated thin film transistors and their sensing applications." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/17241/.

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The thin film transistor (TFT) is one of the most important fundamental building blocks in modern electronic devices. Examples of TFT applications are in integrated circuits (ICs), amplifiers, addressing of flat panel displays, and also as chemical sensors, e.g. as ion- selective field effect transistors (ISFETs). Although the most common semiconductor materials used in thin film transistors (TFTs) is silicon (Si), the versatility of TFTs allows other semiconductors to be used instead of Si-based materials. Recent research effort has been directed towards alternative TFT semiconductors, for ex
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6

Zhang, Qiaoming. "Electrolyte-gated organic field-effect transistors based on organic semiconductor: insulating polymer blends." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667288.

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La presente tesis doctoral se centra en la fabricación, optimización, caracterización y aplicación de capas activas compuestas de una mezcla de semiconductor orgánico y un polímero aislante (OSC:PS) en transistores orgánicos de efecto de campo (EGOFET) con puerta-electrolítica. El EGOFET esta considerado como una prometedora plataforma de detección en el campo de la bioelectrónica debido a su capacidad de operar en medios electrolíticos. Hasta la fecha, aunque en varios proyectos de investigación se ha demostrado su alto potencial como plataforma de detección, existe algunos problemas que debe
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7

Werkmeister, Franz [Verfasser], and Bert [Akademischer Betreuer] Nickel. "Flexible electrolyte gated organic field effect transistors for sensing / Franz Werkmeister ; Betreuer: Bert Nickel." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1121508030/34.

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8

Lago, Nicolò. "Characterization and modelling of organic devices for simultaneous stimulation and recording of cellular electrical activity with Reference-Less Electrolyte-Gated Organic Field-Effect Transistors." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426781.

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The study of neuronal and neurodegenerative diseases requires the development of new tools and technologies to create functional neuroelectronics allowing both stimulation and recording of cellular electrical activity. 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. The interest in such technologies arise from the intrinsic properties of organic materials such as low cost, transparency, softness and flexibility, as well the biocompatibility and the suitability in reali
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9

Bonafè, Filippo. "Charge accumulation and transport in degenerately doped semiconducting polymers with mixed ionic and electronic conductivity." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21710/.

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This thesis is part of the fields of Material Physics and Organic Electronics and aims to determine the charge carrier density and mobility in the hydrated conducting polymer–polyelectrolyte blend PEDOT:PSS. This kind of material combines electronic semiconductor functionality with selective ionic transport, biocompatibility and electrochemical stability in water. This advantageous material properties combination makes PEDOT:PSS a unique material to build organic electrochemical transistors (OECTs), which have relevant application as amplifying transducers for bioelectronic signals. In order t
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10

Le, Gall Jérémy. "Transistor organique à effet de champ à grille électrolytique pour le suivi d’organismes photosynthétiques." Thesis, Université de Paris (2019-....), 2020. http://www.theses.fr/2020UNIP7024.

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Ces dernières années, les progrès de la microfabrication ont rendu accessibles aux laboratoires publics des technologies permettant la réalisation, à relativement faible coût, de dispositifs électroniques, que ce soit dans le domaine des diodes électroluminescentes, des dispositifs photovoltaïques ou des transistors. Par ailleurs, en parallèle des transistors à effet de champ classiques (MOSFET), ont été développées des architectures novatrices, telles que les transistors organiques électrochimiques (OECT) ou, plus récemment encore, les transistors organiques à effet de champ à grille électrol
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11

Nguyen, Thi Thuy Khue. "Détection de polluants dans l'eau potable. Développement d'un immunocapteur sur la base d'un transistor organique à effet de champ à grille électrolytique." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC187/document.

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Aujourd'hui, avec l'augmentation de la population, la consommation de médicaments et de produits phytosanitaires dans l'agriculture a considérablement augmenté. Cela devient inquiétant car une grande partie de ces molécules, rejetée dans l'environnement, ne sont pas bien éliminées par les stations d'épuration (lorsqu'elles existent). En trop grande quantité, ces produits deviennent des poisons pour tous les organismes vivants, y compris l’Homme.Des méthodes analytiques classiques pour la mesure de ces produits chimiques existent déjà (méthodes séparatives classiques telles que la chromatograph
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12

Wang, Dengjun. "Optimization of a biosensor based on an electrolytic gated organic field-effect transistor (EGOFET) for Bisphenol A detection." Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC089.

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Dans les dernières décennies, en raison de leur utilité potentielle dans le diagnostic clinique, la sécurité alimentaire, la sécurité publique et la surveillance de l'environnement, les biocapteurs ont été intensivement étudiés. Ce travail a porté principalement sur la conception et la fabrication d'un nouveau type de biocapteur basé sur un transistor organique électrolytique à effet de champ (EGOFET). Cette méthode permet de mesurer une faible concentration de bisphénol A dans l'eau avec un EGOFET basé de poly (2,5-bis (3-thiophén-2 tétradécyl-yl) thiéno [3,2-b] thiophène) (pBT1T) en tant le
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13

Bártolo, Nuno Gonçalo Simões. "Parameter extraction, modelling and circuit design for electrolyte-gated transistors on paper." Master's thesis, 2018. http://hdl.handle.net/10362/56427.

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Flexible and paper electronics have been getting a lot of attention in the last years. Not only from the scientific community, but also from the end consumer. This ultimately converges in efforts pushing towards the discovery of new and better materials for the TFT technology. With this fast development of new devices, compact models for circuit simulation based on older FETs become obsolete. The availability of fast and accurate models is an essential part of going from single, proof-of-concept devices, to fully operational circuits. In this work, done in the Department of Engineering
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14

Rodrigues, Gonçalo José Pena. "Towards printed carbon nanotube transistors on paper substrates." Master's thesis, 2014. http://hdl.handle.net/10362/14380.

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This thesis reports the work performed in the optimization of deposition parameters of Multi – Walled Carbon Nanotubes (MWCNT) targeting the development of a Field Effect Transistors (FET) on paper substrates. The CNTs were dispersed in a water solution with sodium dodecyl sulphate (SDS) through ultrasonication, ultrasonic bath and a centrifugation to remove the supernatant and have a homogeneous solution. Several deposition tests were performed using different types of CNTs, dis-persants, papers substrates and deposition techniques, such as spray coating and inkjet printing. The characterizat
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15

Machado, Mónica Isabel de Abreu. "Laser induced/scribed graphene electrodes for all printed transistors." Master's thesis, 2017. http://hdl.handle.net/10362/118783.

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This work reports the development of electrolyte gated transistors (EGTs) whose source, drain and gate electrodes are made of laser induced graphene (LIG) on polyamide (PI). The direct patterning of such electrodes with an intended application for EGTs has never been accomplished before. LIG was characterized using a scanning electron microscope (SEM) and Raman Spectroscopy. The minimum sheet resistance achieved with this laser method was 24 Ω/sq. Two types of staggered bottom gate transistors were printed, one using a reusable hydrogel sticker electrolyte and the other using a li
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16

Carvalho, José Tiago Macedo de. "Field-effect transistors based on Zinc oxide nanoparticles." Master's thesis, 2015. http://hdl.handle.net/10362/16391.

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This work reports the development of field-effect transistors (FETs), whose channel is based on zinc oxide (ZnO) nanoparticles (NPs). Using screen-printing as the primary deposition technique, different inks were developed, where the semiconducting ink is based on a ZnO NPs dispersion in ethyl cellulose (EC). These inks were used to print electrolyte-gated transistors (EGTs) in a staggered-top gate structure on glass substrates, using a lithium-based polymeric electrolyte. In another approach, FETs with a staggered-bottom gate structure on paper were developed using a sol-gel method to functi
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17

Barras, Raquel Alexandra Antunes. "Cellulose-based composites as functional conductive materials for printed electronics." Master's thesis, 2015. http://hdl.handle.net/10362/16390.

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In this work, cellulose-based electro and ionic conductive composites were developed for application in cellulose based printed electronics. Electroconductive inks were successfully formulated for screen-printing using carbon fibers (CFs) and multi-walled carbon nanotubes (MWCNTs) as conductive functional material and cellulose derivatives working as binder. The formulated inks were used to fabricate conductive flexible and disposable electrodes on paper-based substrates. Interesting results were obtained after 10 printing passes and drying at RT of the ink with 10 % wt. of pristine CFs and 3%
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18

Rubin, Sabrina Josephine. "Development of eco-friendly ZnO inks for paper-based printed electronics." Master's thesis, 2017. http://hdl.handle.net/10362/45647.

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In this work, we report the development of printable semiconducting inks compatible with screen-printing and paper technology and functional at room temperature without the need of post-deposition treatments. The developed eco-friendly inks are based on a dispersion of zinc oxide nanoparticles on a cellulose matrix. Several cellulose derivatives were used to design and engineer such inks looking for the best formulation, printing conditions and compatibility with cellulose-based substrates. The approach described here represents an innovative and versatile generation of semiconducting in
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