Characterization of Screen-Printed Organic Electrochemical Transistors to Detect Cations of Different Sizes
| Autor: | José Vicente Lidón-Roger, Clara Pérez-Fuster, Eduardo Garcia-Breijo, Annalisa Bonfiglio, Laura Contat-Rodrigo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
organic electrochemical transistors screen-printing PEDOT:PSS large-size cations Analytical chemistry 02 engineering and technology lcsh:Chemical technology 010402 general chemistry Electrochemistry 01 natural sciences Biochemistry Article Analytical Chemistry Rhodamine TECNOLOGIA ELECTRONICA PSS [PEDOT] chemistry.chemical_compound Large-size cations Rhodamine B lcsh:TP1-1185 Electrical and Electronic Engineering Metal gate Instrumentation Screen-printing business.industry Organic electrochemical transistors 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry Electrode Screen printing MAQUINAS Y MOTORES TERMICOS Optoelectronics OECT 0210 nano-technology business AND gate |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 16, Iss 10, p 1599 (2016) RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname Sensors; Volume 16; Issue 10; Pages: 1599 |
| ISSN: | 2015-6413 |
| Popis: | [EN] A novel screen-printing fabrication method was used to prepare organic electrochemical transistors (OECTs) based on poly(3,4-ethylenedioxythiophene) doped with polysterene sulfonate (PEDOT:PSS). Initially, three types of these screen-printed OECTs with a different channel and gate areas ratio were compared in terms of output characteristics, transfer characteristics, and current modulation in a phosphate buffered saline (PBS) solution. Results confirm that transistors with a gate electrode larger than the channel exhibit higher modulation. OECTs with this geometry were therefore chosen to investigate their ion-sensitive properties in aqueous solutions of cations of different sizes (sodium and rhodamine B). The effect of the gate electrode was additionally studied by comparing these all-PEDOT:PSS transistors with OECTs with the same geometry but with a non-polarizable metal gate (Ag). The operation of the all-PEDOT:PSS OECTs yields a response that is not dependent on a Na+ or rhodamine concentration. The weak modulation of these transistors can be explained assuming that PEDOT:PSS behaves like a supercapacitor. In contrast, the operation of Ag-Gate OECTs yields a response that is dependent on ion concentration due to the redox reaction taking place at the gate electrode with Cl− counter-ions. This indicates that, for cation detection, the response is maximized in OECTs with non-polarizable gate electrodes. Financial support from FEDER and Spanish Government funds (MAT2015-64139-C4-3-R (MINECO/FEDER)) and GVA funds (AICO/2015/103) are gratefully acknowledged. |
| Databáze: | OpenAIRE |
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