scholarly journals Comparison of Optical Ammonia-Sensing Properties of Conducting Polymer Complexes with Polysulfonic Acids

Chemosensors ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 206
Author(s):  
Oxana Gribkova ◽  
Varvara Kabanova ◽  
Vladimir Tverskoy ◽  
Alexander Nekrasov
Keyword(s):  
Thin Films ◽  
Conducting Polymers ◽  
Response Time ◽  
Conducting Polymer ◽  
Ammonia Vapor ◽  
Polymer Complexes ◽  
Ammonia Sensing ◽  
Electrochemically Deposited ◽  
Vapor Sensors ◽  
Sensing Performance

Thin films of conducting polymer complexes with polysulfonic acids of various structures were electrochemically deposited onto transparent FTO electrodes. The behavior of the polymer-based optical ammonia vapor sensors in response to various concentrations of ammonia vapors, ranging from 5 to 135 ppm, was investigated, including the response time and response amplitude. It was found that the nature of the conducting polymers (poly (3,4-ethylenedioxythiophene), polypyrrole, polyaniline), as well as the structure of the polyacids, affected the sensing performance of the obtained complexes.

Ammonia sensing performance of thin films of cobalt(II) phthalocyanine bearing fluorinated substituents

2019 ◽  
Vol 30 (8) ◽  
pp. 7543-7551 ◽  
Author(s):  
Esra Nur Kaya ◽  
Ahmet Şenocak ◽  
Darya D. Klyamer ◽  
Erhan Demirbaş ◽  
Tamara V. Basova ◽  
...  
Keyword(s):  
Thin Films ◽  
Ammonia Sensing ◽  
Sensing Performance

Assessing simultaneous effect of Ar/O2 ratio and process pressure on ammonia sensing properties of reactive DC magnetron sputtered SnO2 thin films

2021 ◽  
Vol 286 ◽  
pp. 129239
Author(s):  
Rahul Prajesh ◽  
Ravindra Kumar Jha ◽  
Vikas Saini ◽  
Mohd Nahid ◽  
Vinay Goyal ◽  
...  
Keyword(s):  
Thin Films ◽  
Sensing Properties ◽  
Simultaneous Effect ◽  
Ammonia Sensing ◽  
Process Pressure ◽  
Sno2 Thin Films

scholarly journals Color Tuning by Oxide Addition in PEDOT:PSS-Based Electrochromic Devices

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 179 ◽  
Author(s):  
Delphin Levasseur ◽  
Issam Mjejri ◽  
Thomas Rolland ◽  
Aline Rougier
Keyword(s):  
Thin Films ◽  
Iron Oxide ◽  
Conducting Polymers ◽  
Applied Voltage ◽  
Oxide Content ◽  
Electrochromic Devices ◽  
Careful Evaluation ◽  
Pedot Film ◽  
Oxide Addition ◽  
Dark Blue

Poly(3,4-ethylenedi-oxythiophene) (PEDOT) derivatives conducting polymers are known for their great electrochromic (EC) properties offering a reversible blue switch under an applied voltage. Characterizations of symmetrical EC devices, built on combinations of PEDOT thin films, deposited with a bar coater from commercial inks, and separated by a lithium-based ionic membrane, show highest performance for 800 nm thickness. Tuning of the color is further achieved by mixing the PEDOT film with oxides. Taking, in particular, the example of optically inactive iron oxide Fe2O3, a dark blue to reddish switch, of which intensity depends on the oxide content, is reported. Careful evaluation of the chromaticity parameters L*, a*, and b*, with oxidizing/reducing potentials, evidences a possible monitoring of the bluish tint.

scholarly journals Direct measurement of the thermoelectric properties of electrochemically deposited Bi2Te3 thin films

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jose Recatala-Gomez ◽  
Pawan Kumar ◽  
Ady Suwardi ◽  
Anas Abutaha ◽  
Iris Nandhakumar ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermoelectric Properties ◽  
Bismuth Telluride ◽  
Indium Tin Oxide ◽  
Seed Layer ◽  
Room Temperature ◽  
Low Cost ◽  
Temperature Dependent ◽  
Temperature Heat ◽  
Electrochemically Deposited

Abstract The best known thermoelectric material for near room temperature heat-to-electricity conversion is bismuth telluride. Amongst the possible fabrication techniques, electrodeposition has attracted attention due to its simplicity and low cost. However, the measurement of the thermoelectric properties of electrodeposited films is challenging because of the conducting seed layer underneath the film. Here, we develop a method to directly measure the thermoelectric properties of electrodeposited bismuth telluride thin films, grown on indium tin oxide. Using this technique, the temperature dependent thermoelectric properties (Seebeck coefficient and electrical conductivity) of electrodeposited thin films have been measured down to 100 K. A parallel resistor model is employed to discern the signal of the film from the signal of the seed layer and the data are carefully analysed and contextualized with literature. Our analysis demonstrates that the thermoelectric properties of electrodeposited films can be accurately evaluated without inflicting any damage to the films.

Development of the Structural, Optical, and Electrical Properties of PEDOT:PSS Conducting Polymer Thin Film for Energy Applications

2021 ◽  
Vol 902 ◽  
pp. 65-70
Author(s):  
Samar Aboulhadeed ◽  
Mohsen Ghali ◽  
Mohamad M. Ayad
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Properties ◽  
Conducting Polymer ◽  
Film Surface ◽  
Volume Ratio ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Optical And Electrical Properties ◽  
Energy Applications

We report on a development of the structural, optical and electrical properties of poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT:PSS) conducting polymer thin films. The PEDOT:PSS thin films were deposited by a controlled thin film applicator and their physical properties were found to be effectively modified by isopropanol. The deposited films were investigated by several techniques including XRD, UV–Vis, SPM and Hall-effect. Interestingly, by optimizing the PEDOTS:PSS/ISO volume ratio (v:v), we find that the film charge carriers type can be switched from p to n-type with a high bulk carriers concentration reaching 6×1017 cm-3. Moreover, the film surface roughness becomes smoother and reaching a small value of only 1.9 nm. Such development of the PEDOT:PSS film properties makes it very promising to act as an electron transport layer for different energy applications.

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