Gotowe bibliografie tematyczne / PEDOT Surface

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Gotowa bibliografia na temat „PEDOT Surface”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "PEDOT Surface"

Qi, Jian, Ning Bo Huo, Zheng Yi Cui i Jie Wu. "Electrical Heating Properties of PEDOT Thin Film Prepared by In Situ Polymerization". Advanced Materials Research 538-541 (czerwiec 2012): 92–95. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.92.

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Poly (3, 4-ethylenedioxythiophene) (PEDT) has attracted a great deal of interest during the last decades. PEDOT was popular with many applications such as antistatic coating, the hole injection layer in OLED. The thermal stability of PEDOT is important in these applications. In this study, PEDOT films were prepared by oxidative polymerization on the substrate polyimide (PI) films. Matrix polymer poly (vinyl prrrolidone) (PVP), Monomer 3, 4-ethylenedioxythiophene), retardant were dissolved in solvent as monomer solution; The Iron (III) p-toluenesulfonate hexahydrate (FTS) was used as oxidant solution. To investigate the heating properties of PEDOT films, the content of PVP, oxidant FTS, retardant were varied. The influence of treatment current density was also studied. Thickness of the PEDOT film was measured by Alpha-step surface profiler and the surface resistivity was measured by multimeter.

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Hsu, Chuan-Chih, Yu-Wei Cheng, Che-Chun Liu, Xin-Yao Peng, Ming-Chi Yung i Ting-Yu Liu. "Anti-Bacterial and Anti-Fouling Capabilities of Poly(3,4-Ethylenedioxythiophene) Derivative Nanohybrid Coatings on SUS316L Stainless Steel by Electrochemical Polymerization". Polymers 12, nr 7 (30.06.2020): 1467. http://dx.doi.org/10.3390/polym12071467.

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We have successfully fabricated poly(3,4-ethylenedioxythiophene) (PEDOT) derivative nanohybrid coatings on flexible SUS316L stainless steel by electrochemical polymerization, which can offer anti-fouling and anti-bacterial capabilities. PEDOT derivative nanohybrids were prepared from polystyrene sulfonates (PSS) and graphene oxide (GO) incorporated into a conducting polymer of PEDOT. Additionally, the negative charge of the PEDOT/GO substrate was further modified by poly-diallyldimethylammonium chloride (PDDA) to form a positively charged surface. These PEDOT derivative nanohybrid coatings could provide a straightforward means of controlling the surface energy, roughness, and charges with the addition of various derivatives in the electrochemical polymerization and electrostatically absorbed process. The characteristics of the PEDOT derivative nanohybrid coatings were evaluated by Raman spectroscopy, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), water contact angle, and surface potential (zeta potential). The results show that PEDOT/PSS and PEDOT/GO nanohybrid coatings exhibit excellent anti-fouling capability. Only 0.1% of bacteria can be adhered on the surface due to the lower surface roughness and negative charge surface by PEDOT/PSS and PEDOT/GO modification. Furthermore, the anti-bacterial capability (7 mm of inhibition zone) was observed after adding PDDA on the PEDOT/GO substrates, suggesting that the positive charge of the PEDOT/GO/PDDA substrate can effectively kill bacteria (Staphylococcus aureus). Given their anti-fouling and anti-bacterial capabilities, PEDOT derivative nanohybrid coatings have the potential to be applied to biomedical devices such as cardiovascular stents and surgical apparatus.

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Biliuk, A. A., O. Yu Semchuk, O. O. Havryliuk i A. I. Biliuk. "Modeling of optical characteristics of organic solar cells based on poly (3,4-ethylene dioxythiophene): polystyrene sulfonate with incorporated silver nanoparticles". Surface 13(28) (30.12.2021): 57–65. http://dx.doi.org/10.15407/surface.2021.13.057.

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Changing the geometric parameters of the elements of the organic solar cell (OSC) and its components, changes in its optical characteristics such as reflection, absorption and transmission of light were studied. In the simulation, the main elements influencing the change in the characteristics of the OSC were poly (3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS), poly (3-hexylthiophene): [6,6] phenyl-C61butyric acid methyl ester (P3HT: PCBM) on silver nanoparticles. The dimensions of silver nanoparticles coincide with the thickness of the PEDOT layer (50 nm) in which they are located, the particle diameter is 45 nm, the thickness of the P3HT: PCBM layer has always remained equal to 100 nm. The peak at a wavelength of about 726 nm, when there are silver particles in the OSC, indicates the presence of localized surface plasmon resonance (LPPR), which causes a local amplification of the electromagnetic field near the surface of metal nanoparticles. LPPR induced by silver nanoparticles not only increases the degree of light absorption, but also enhances the degree of exciton dissociation. As a result, photocurrent and overall OSC efficiency can be significantly improved due to LPPR.

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Li, Shiyu, Xinbo Wen, Jiadong Zhou, Nan Zheng, Linlin Liu i Zengqi Xie. "Construction of Interface Dipoles by Surface Doping and Their Role in the Open Circuit Voltage in Polymer Solar Cells". Organic Materials 02, nr 02 (kwiecień 2020): 071–77. http://dx.doi.org/10.1055/s-0040-1702933.

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A kind of dipolar interface is realized by surface doping of poly-(3,4-ethylenedioxythiophene) (PEDOT) with tetrafluoro-tetracyano-quinodimethane (F4TCNQ). PEDOT is in situ synthesized by electrochemical polymerization of 3,4-ethylenedioxythiophene (EDOT) on an indium tin oxide (ITO) electrode, and then F4TCNQ is spin-coated atop the PEDOT layer. Because the LUMO of F4TCNQ is lower than the HOMO of PEDOT, the spontaneous electron transfer from PEDOT to F4TCNQ results in a bilayered structure of PEDOT cations and F4TCNQ anions. Thus, a permanent interfacial dipole is formed in the surface-doping system. The surface doping not only enhances the conductivity of PEDOT, but also increases the surface work function of the electrode. The dipolar film is applied as the anode interface in polymer solar cells (PSCs), and the results show that such an interface dipole plays a very important role in the open circuit voltage (V oc) of the PSCs.

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El Haitami, Alae, Ana-Maria Resmerita, Laura Elena Ursu, Mihai Asandulesa, Sophie Cantin i Aurica Farcas. "Novel Insight into the Photophysical Properties and 2D Supramolecular Organization of Poly(3,4-ethylenedioxythiophene)/Permodified Cyclodextrins Polyrotaxanes at the Air–Water Interface". Materials 16, nr 13 (30.06.2023): 4757. http://dx.doi.org/10.3390/ma16134757.

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Two poly(3,4-ethylenedioxythiophene) polyrotaxanes (PEDOT∙TMe-βCD and PEDOT∙TMe-γCD) end-capped by pyrene (Py) were synthesized by oxidative polymerization of EDOT encapsulated into TMe-βCD or TMe-γCD cavities with iron (III) chloride (FeCl3) in water and chemically characterized. The effect of TMe-βCD or TMe-γCD encapsulation of PEDOT backbones on the molecular weight, thermal stability, and solubility were investigated in depth. UV–vis absorption, fluorescence (FL), phosphorescence (PH), quantum efficiencies, and lifetimes in water and acetonitrile were also explored, together with their surface morphology and electrical properties. Furthermore, dynamic light scattering was used to study the hydrodynamic diameter (DH) and z-potential (ZP-ζ) of the water soluble fractions of PEDOT∙TMe-βCD and PEDOT∙TMe-γCD. PEDOT∙TMe-βCD and PEDOT∙TMe-γCD exhibited a sharp monodisperse peak with a DH of 55 ± 15 nm and 122 ± 32 nm, respectively. The ZP-ζ value decreased from −31.23 mV for PEDOT∙TMe-βCD to −20.38 mV for PEDOT∙TMe-γCD, indicating that a negatively charged layer covers their surfaces. Surface pressure–area isotherms and Brewster angle microscopy (BAM) studies revealed the capability of the investigated compounds to organize into sizeable and homogeneous 2D supramolecular assemblies at the air–water interface. The control of the 2D monolayer organization through the thermodynamic parameters of PEDOT∙TMe-βCD and PEDOT∙TMe-γCD suggests potential for a wide range of optoelectronic applications.

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Venkatesan, Ragavendran, Sheik Moideen Thaha Sheik Kadar Maideen, Saravanan Chandhiran, Sunil Singh Kushvaha, Suresh Sagadevan, Vishnukanthan Venkatachalapathy i Jeyanthinath Mayandi. "Fabrication and Characterization of Si/PEDOT: PSS-Based Heterojunction Solar Cells". Electronics 11, nr 24 (12.12.2022): 4145. http://dx.doi.org/10.3390/electronics11244145.

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In this study, we fabricated a planar Si/PEDOT: PSS heterojunction solar cell using three different solvents—ethylene glycol, acetonitrile, and dimethyl sulfoxide—to find the best one. The fabricated samples were characterized by diffuse reflectance spectroscopy, scanning electron microscopy, X-ray diffraction, and current–voltage. Diffused reflectance spectrum analysis showed reduced reflectance compared to the bare silicon wafers. The absorbance spectrum shows the change in absorption of the Si-coated PEDOT: PSS which was more than a 50% increase in the UV region, and for the EG sample, there was a 20% increase in the entire visible spectrum. This indicates that the solvent plays a major role in the bandgap between the Si and Si/PEDOT: PSS. Scanning electron microscope (SEM) was used to examine the surface morphology of Si/PEDOT: PSS as agglomerated, island-formed surfaces and carbon-layered Si-PEDOT: PSS. Cross-sectional images show the thickness of the PEDOT: PSS layer on the silicon wafer surface. The X-ray diffraction (XRD) pattern shows the characteristic peaks for silicon (69.5°), and Si/PEDOT: PSS shows a forbidden Si (200) peak at 32°. Current–voltage measurements have shown the characteristic diode curve for all fabricated cells. This characteristic diode curve indicated the presence of a heterojunction. Ethylene glycol-containing cells showed current output as 0.2 μA with Voc of 0.2 V.

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Syed Zainol Abidin, Shariffah Nur Jannah, Nur Hawa Nabilah Azman, Shalini Kulandaivalu i Yusran Sulaiman. "Poly(3,4-ethylenedioxythiophene) Doped with Carbon Materials for High-Performance Supercapacitor: A Comparison Study". Journal of Nanomaterials 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/5798614.

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A comparative study of multiwalled carbon nanotube (MWCNT), graphene oxide (GO), and nanocrystalline cellulose (NCC) as a dopant in the preparation of poly(3,4-ethylenedioxythiophene)- (PEDOT-) based hybrid nanocomposites was presented here. The hybrid nanocomposites were prepared via the electrochemical method in aqueous solution. The FTIR and Raman spectra confirmed the successful incorporation of dopants (MWCNT, GO, and NCC) into PEDOT matrix in the process of formation of the hybrid nanocomposites. It was observed that the choice of the carbon material affected the morphologies and supercapacitive properties of the hybrid nanocomposites. Incorporation of GO with PEDOT produces a paper-like sheet nanocomposite in which the wrinkled surface results in larger surface area compared to the network-like and rod-like structures of PEDOT/MWCNT and PEDOT/NCC, respectively. Owing to larger surface area, PEDOT/GO exhibits the highest specific capacitance (120.13 F/g), low equivalent series resistance (34.44 Ω), and retaining 87.99% of the initial specific capacitance after 1000 cycles, signifying a long-term cycling stability. Furthermore, the high performance of PEDOT/GO is also demonstrated by its high specific energy and specific power.

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Zhang, Mei Juan, i Jian Xiong Li. "Preparation of Conducting PEDOT/PI Films by Depositing Polymerization of EDOT in Liquid Phase". Applied Mechanics and Materials 341-342 (lipiec 2013): 8–12. http://dx.doi.org/10.4028/www.scientific.net/amm.341-342.8.

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PI film was suspended in NaOH, FeCl3and EDOT solutions sequentially. The surfaces of the films were analyzed with ATR-FTIR and the surface resistances were measured in four-probe mode. After immersed in NaOH solution amic acids were introduced to the film surface. The hydrolyzed film exhibited better adsorbing property and was able to adsorb FeCl3in g/m2magnitude. As the film with adsorbed FeCl3was suspended in EDOT solution EDOT deposited on the surface and converted to conducting PEDOT. The resultant film exhibited surface resistance about 105Ω and the characteristic absorption bonds of PEDOT on FTIR spectrum.

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Aimukhanov, А. К., X. S. X.S. Rozhkova, А. К. Zeinidenov i Т. E. Seisembekova. "Influence of surface structure and morphology of PEDOT: PSS on its optical and electrophysical characteristics". Bulletin of the Karaganda University. "Physics" Series 103, nr 3 (30.09.2021): 93–100. http://dx.doi.org/10.31489/2021ph3/93-100.

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This paper presents the results of a study of the effect of modification of the structure of the PEDOT: PSS polymer with hole conductivity on the optical and electrophysical properties of an organic solar cell. It was found that the modification of a polymer film with ethyl and isopropyl alcohols leads to a change in the morphology and roughness of the film surface. It has been determined that annealing of films in alcohol vapor promotes the formation of more uniform films. It is shown that upon modification of the PEDOT: PSS film in alcohol vapor the absorption spectrum shifts the absorption maximum of PEDOT to the short-wavelength region of the spectrum, the absorption of the aromatic PSS fragment decrease. X-ray phase analysis showed that after surface modification with alcohol vapor, the PEDOT and PSS chains change their structure. It is shown that the structural features of the surface morphology of PEDOT: PSS affect the electrophysical parameters of the films, such as the effective extraction rate and the effective time of flight of charge carriers. It was found that the modification of the surface of the PEDOT: PSS film leads to an improvement in the electrical transport properties of the films.

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Lee, Sung Koo, i Kyeong K. Lee. "Conductivity Enhancement of PEDOT/PSS Films with Ionic Liquids as Dopants". Advanced Materials Research 93-94 (styczeń 2010): 501–4. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.501.

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The ionic materials were added to PEDOT/PSS solution as secondary dopants. The conductivity of PEDOT/PSS film improved with adding ionic materials. The film of PEDOT/PSS with 1% pyridinium p-toluene-sulfonate showed the conductivity of 23S/cm, which is increased about three orders than the film of origin PEDOT/PSS with 0.028S/cm. The surface morphology of films of PEDOT/PSS mixture is investigated by atomic force microscope. The AFM showed the increasing of grain size with the addition of pyridinium p-toluene-sulfonate.

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Rozprawy doktorskie na temat "PEDOT Surface"

Garnier, Jérôme. "Polymer electrochromism and surface plasmons combined on metallic diffraction gratings". Thesis, Linköping University, Department of Science and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11522.

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All conducting polymers are potentially electrochromic, owing to the injection of charge carriers that changes their electronic structure and results in a shift of their optical absorption towards higher wavelengths. PEDOT-PSS and PEDOT-S are very promising materials in terms of electrochromic properties, due to the good contrast existing between their doped and undoped forms. However this contrast has to be enhanced in order to design more efficient electrochromic devices, and new solutions should thus be found in order to solve this issue.

Surface plasmons are described as electromagnetic waves propagating along the surface between a dielectric and a metal. Coupled to an incident radiation, they create an energy loss in the light transmitted and reflected by the interface. When the metallic surface is periodically corrugated, this absorption phenomenon due to plasmonic resonance occurs at a specific wavelength that depends on several parameters, such as the incidence angle, the dielectric constants of the two media and the grating period. By coating metallic gratings with electrochromic polymers, we may thus be able to trigger a plasmonic absorption at a given wavelength and shift it upon reduction or oxidation of the material.

Electrochromic devices consisting of PEDOT-PSS or PEDOT-S spin-deposited on gold and silver gratings were investigated by UV-visible reflectance measurements. The periodically corrugated structures were reproduced from commercial gratings by soft nanolithography and were analyzed by AFM. Some electrochromic cells exhibited new colors or a high shift of the plasmonic resonance upon redox switching of the polymer film. Depending on the step and the nature of the grating employed, this shift could reach 20 nm in the case of PEDOT-PSS and more than 100 nm for PEDOT-S. A theoretical model was found to predict the wavelength of plasmonic excitation and the orientation of the shift.

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Dogan, Uzeyir. "Preparation And Characterization Of Surface Enhanced Raman Scattering Substrate Through Electro Deposition Of Silver-pedot Film On Ito Glass Surface". Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613667/index.pdf.

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Detection of chemicals is a vital part of chemistry. For this reason, many detection systems are developed by scientists and every detection system has its own advantages. Raman spectroscopy is one of these detection systems having many advantages. However, this technique suffers from low signal intensity disadvantage. By developing a well prepared substrate, this problem can be easily solved
moreover, even single molecule detection can be possible. In this study, a novel surface enhanced Raman scattering (SERS) substrate was prepared in two steps: In the first step, ethylenedioxythiophene (EDOT) monomer was polymerized electrochemically onto indium tin oxide (ITO) coated glass. In the next step, silver ions were reduced electrochemically onto surface prepared in the previous step.In the substrate preparation part, the reduction potential of silver ion, the concentration of silver ions in solution, the polymer film thickness and reduced silver amount on substrates were optimized to get the best SERS performances from substrates. The prepared substrates were characterized by cyclic voltammetry (CV), ultraviolet-visible (UV-Vis) spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX) attached to SEM. In the SERS performance investigation part, homogeneity and the shelf life of the prepared silver-PEDOT substrates were tested. Homogeneity is very important in terms for the applications of Raman technique in quantitative analysis since most of the reported substrates are lack homogeneity consideration, our study will be an important contribution to the literature. The stability of the substrate was investigated for a period of one month. The very small change in the signal at the end of one month indicated that the substrate can be used even longer time with high efficiency. In all the studies, brilliant cresyl blue (BCB) is used as a model compound. Some important Raman active chemicals, namely, rhodamine 6G (R6G) and 4-mercapto benzoic acid (4-MBA) were detected by using the prepared substrates.

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Cao, Zhixiong. "Silver nanoprisms in plasmonic organic solar cells". Thesis, Ecole centrale de Marseille, 2014. http://www.theses.fr/2014ECDM0015/document.

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On constate une forte demande mondiale d' énergie propre et renouvelable en raison de la consommation rapide des combustibles fossiles non renouvelables et l'effet de serre qui en résulte. Une solution prometteuse pour produire une énergie propre et renouvelable est d'utiliser des cellules solaires pour convertir l' énergie solaire directement en électricité. Comparativement à leurs homologues inorganiques, les cellules solaires organiques (OSCs) sont maintenant intensivement étudiées en raison des avantages tels que le poids léger, la flexibilité, la compatibilité avec les procédés de fabrication à faibles coûts. Malgré ces avantages, l'efficacité de conversion (PCE) des OSCs doit encore être améliorée pour la commercialisation à grande échelle. Les cellules solaires organiques sont réalisées en pile de couches minces comprenant des électrodes, la couche de transport d' électrons, la couche de polymère actif et la couche de transport de trous. Dans cette étude, nous sommes concernés par la couche de PEDOT:PSS qui est couramment utilisée comme une couche tampon entre l'électrode anodique et la couche de polymère actif de cellules solaires organiques. Cette étude vise à intégrer différentes concentrations de nanoprismes (NPSMs) d'argent de taille sub-longueur d'onde dans du PEDOT: PSS afin de profiter de leurs propriétés optiques uniques nées de résonances de plasmons de surface localisées (LSPR) pour améliorer la collecte lumineuse et l'efficacité de génération de charge en optimisant l' absorption et la diffusion de la lumière. Nous avons constaté que les facteurs clés qui contrôlent les performances des cellules solaires plasmoniques comprennent non seulement les propriétés optiques, mais également les propriétés structurelles et électriques des couches hybrides de PEDOT:PSS comprenant des NPSMs d' Ag. D'une part, l'ajout de NPSMs d' Ag conduit ¨¤ (1) une augmentation de l'absorption optique; (2) de la diffusion de la lumière ¨¤ de grands angles ce qui pourrait conduire ¨¤ un meilleur piégeage de la lumière dans les OSCs. D'autre part, (1) la rugosité de surface est augment¨¦e en raison de la formation d'agglomérats de NPSMs d' Ag, ce qui conduit ¨¤ une meilleure efficacité de collecte de charge; (2) la résistance globale des films hybrides est également augment¨¦e en raison de l'excès de PSS introduit par les NPSMs d' Ag incomplètement purifiées, inférieur courant de court-circuit (Jsc) qui en résulte; (3) les Ag NPSMs et leurs agglomérats ¨¤ l'interface PEDOT:PSS/couche photo-active pourraient agir comme des centres de recombinaison, conduisant ¨¤ une réduction de la résistance de shunt, du Jsc et de la tension en circuit ouvert (Voc). Afin de résoudre partiellement l'inconvénient (2) et (3), en intégrant des NPSMs d¡¯Ag davantage purifiés et une petite quantité de glycérol dans le PEDOT:PSS, la résistance des couches hybrides de PEDOT:PSS-Ag-NPSMs peut ¨être réduite à une valeur comparable ou inférieure ¨¤ celles couches vierges. Les futurs progrès en chimie de surface colloïdale et l'optimisation sur le processus d'incorporation des nanoparticules seront nécessaires pour produire des cellules solaires organiques plasmoniques de meilleures performances
Nowadays there has been a strong global demand for renewable and clean energy due to the rapid consumption of non-renewable fossil fuels and the resulting greenhouse effect. One promising solution to harvest clean and renewable energy is to utilize solar cells to convert the energy of sunlight directly into electricity. Compared to their inorganic counterparts, organic solar cells (OSCs) are now of intensive research interest due to advantages such as light weight, flexibility, the compatibility to low-cost manufacturing processes. Despite these advantages, the power conversion efficiency (PCE) of OSCs still has to be improved for large-scale commercialization. OSCs are made of thin film stacks comprising electrodes, electron transporting layer, active polymer layer and hole transporting layer. In this study, we are concerned with PEDOT:PSS layer which is commonly used as a buffer layer between the anodic electrode and the organic photoactive layer of the OSC thin film stack. We incorporated different concentrations of silver nanoprisms (NPSMs) of sub-wavelength dimension into PEDOT:PSS. The purpose is to take advantage of the unique optical properties of Ag MPSMs arisen from localized surface plasmon resonance (LSPR) to enhance the light harvest and the charge generation efficiency by optimizing absorption and scattering of light in OSCs. We found that the key factors controlling the device performance of plasmonic solar cells include not only the optical properties but also the structural and electrical properties of the resulting hybrid PEDOT:PSS-Ag-NPSM-films. On one hand, the addition of Ag NPSMs led to (1) an increased optical absorption; (2) light scattering at high angles which could possibly lead to more efficient light harvest in OSCs. On the other hand, the following results have been found in the hybrid films: (1) the surface roughness was found to be increased due to the formation of Ag agglomerates, leading to increased charge collection efficiency; (2) the global sheet resistance of the hybrid films also increases due to the excess poly(sodium styrenesulphonate) introduced by incompletely purified Ag NPSMs, resulting in lower short circuit current (Jsc); (3) the Ag nanoprisms and their agglomerates at the PEDOT:PSS/photoactive layer interface could act as recombination centers, leading to reductions in shunt resistance, Jsc and open circuit voltage (Voc). In order to partially counteract the disadvantage (2) and (3), by incorporating further purified Ag NPSMs and/or a small amount of glycerol into PEDOT:PSS, the sheet resistance of hybrid PEDOT:PSS-Ag-NPSM-films was reduced to a resistance value comparable to or lower than that of pristine film

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IQBAL, KASHIF. "Study of Rheological Behaviour of Coating Paste containing conductive polymer complex". Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-20146.

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Conducting polymer coating is the new developing area in the field of advanced textiles. In this project the rheological behaviour of paste containing conducting polymer was studied during formulation to coating application. The literature study is done by keeping all the contents of project in mind and a wide area of conductive polymer, coating methods, binder system and rheology modifier is covered. The rheological behaviour of different fluid containing newtanion and non-newtanion behaviour is discussed for better understanding of the project working. Polyester fabric was coated by knife coating method. In paste formulation, the chemicals used were polyurethane binder with two HEUR based rheology modifiers. A lot of experiments were performed to determine the right amount of rheology modifier alone or in combination for paste formulation and coating application and interesting findings were observed during the experimental work which had been justified in results and analysis. After application, the coated fabric was checked for resistivity.
Program: Magisterutbildning i textilteknologi

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Sekli-Belaidi, Fadhila. "Fonctionnalisation de surfaces d'électrodes par un film de poly (3,4-éthylènedioxythiophène) PEDOT pour l'élaboration de microcapteur spécifique des acides ascorbique et urique : application à l'étude des propriétés antioxydantes du sérum sanguin". Toulouse 3, 2011. http://thesesups.ups-tlse.fr/1144/.

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Les acides ascorbique (AA) et urique (AU) sont d'un grand intérêt biologique vu les différents rôles qu'ils jouent dans l'organisme (agents antioxydant, cofacteur d'hydroxylation, marqueur du métabolisme des purines). Chez les cliniciens, le dosage de ces deux molécules aide à l'établissement de diagnostics et aux suivis thérapeutiques. Face aux méthodes classiques actuellement utilisées (la chromatographie liquide à haute performance et la spectrométrie), qui nécessitent souvent des étapes de prétraitement de l'échantillon, l'objectif de ce travail est de mettre au point un microcapteur voltammétrique fonctionnalisé par un polymère conducteur électrogénéré le poly (3,4-éthylènedioxythiophène) PEDOT. Le capteur a permis de doser sélectivement et simultanément les deux acides. L'étude des conditions d’élaboration du film (paramètres d'électrolyse, épaisseur du dépôt) et des paramètres de mesure électrochimique a permis d'optimiser les performances analytiques du capteur (sensibilité, seuil limite de détection, domaine de linéarité) dans des solutions modèles. L'étude a mis en évidence un mécanisme EC' de régénération de l'acide urique par l'acide ascorbique au voisinage de l'électrode. Le capteur a ensuite été éprouvé directement dans le sérum sanguin sans aucune préparation de l'échantillon. Les résultats des dosages électrochimiques des deux acides sont en très bonne adéquation avec ceux des méthodes chromatographiques et enzymatiques
Ascorbic (AA) and uric (UA) acids are of a great biological interest considering the various physiological roles they play (antioxidants, cofactor of hydroxylation, marker of the purins metabolism). In medicine, the assay of both molecules contributes to the establishment of diagnosis and therapies. In alternative to the traditional methods currently used (high performance chromatography liquid and spectrometry), which are generally time consuming and often require costly materials, complex experimental protocols and sample pretreatment, the aim of this work is to develop a voltammetric microsensor functionalized by a electrogenerated conducting polymer (3,4-ethylenedioxythiophene) PEDOT. This sensor made possible a selective and sensitive simultaneous detection of both acids. The study of the electropolymerization parameters (PEDOT film thickness, electropolymerization potential range, monomer concentration) and of the electrochemical measurements parameters (potential scan rate) allows the optimization of the analytical performances of the microsensor (sensitivity, limit of detection and linear range). The study highlighted also an EC’ mechanism of regeneration of uric acid by ascorbic acid in the vicinity of the electrode. Electrochemical assay of the two acids was finally performed in the human blood serum without any preparation of the sample. The results are in very good agreement with those of the standardized chromatographic and enzymatic methods

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Tran, Tuan A. "Extrinsic Fabry-Perot interferometer for surface acoustic wave measurement". Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10242009-020318/.

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Lee, Kyung-Woo. "Fiber Fabry-Perot interferometer (FFPI) sensor using vertical cavity surface emitting laser (VCSEL)". Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/4221.

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This research represents the first effort to apply vertical cavity surface emitting lasers (VCSELs) to the monitoring of interferometric fiber optic sensors. Modulation of the drive current causes thermal tuning of the laser light frequency. Reflection of this frequency-modulated light from a fiber Fabry-Perot interferometer (FFPI) sensor produces fringe patterns which can be used to measure the optical path difference of the sensor. Spectral characteristics were measured for 850nm VCSELs to determine the combination of dc bias current, modulation current amplitude and modulation frequency for which single mode VCSEL operation and regular fringe patterns are achieved. The response characteristics of FFPI sensors were determined experimentally for square, triangular, saw-tooth waveforms at frequencies from 10kHz to 100kHz. The dependence of VCSEL frequency on the dc bias current was determined from spectral measurements to be ~165GHz/mA. An independent measurement of this quantity based on counting fringes from the FFPI sensor as the laser modulated was in good agreement with this value. The effect of optical feedback into the laser was also studied. By observing the fringe shift as the FFPI sensor was heated, a fractional change in optical length with temperature of 6.95 X 10-6/ÃÂ°C was determined in good agreement with previous measurements on a 1300nm single mode fiber. The performance of 850nm VCSEL/FFPI systems was compared with their counterparts using 1300nm distributed feedback (DFB) lasers. The results of these experiments show that the 850nm VCSEL/FFPI combination gives regular fringe patterns at much lower bias current and modulating current amplitudes than their 1300nm DFB/FFPI counterparts.

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Hodiak, Justin Hannah. "Design of fiber-coupled surface-normal fabry perot electroabsorption modulators for analog applications /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1999. http://wwwlib.umi.com/cr/ucsd/fullcit?p9936831.

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Richard, William. "Nouvelle stratégie de fonctionnalisation de surfaces d'électrodes à base de sels de diazonium : application aux capteurs à antioxydants". Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2231/.

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Les travaux présentés dans ce manuscrit se sont focalisés dans un premier temps sur l'étude de la réduction du 4-nitrobenzène diazonium (NBD). Des études mécanistique et cinétique ont permis d'élucider la réactivité du NBD et de compléter les données bibliographiques sur le sujet. Un capteur à antioxydants fonctionnalisé par le NBD a ensuite été envisagé, ouvrant les portes à la détection de l'acide ascorbique (AA). Dans un second temps, une fonctionnalisation mixte à partir d'un sel de diazonium et un polymère conducteur, le polyéthylènedioxythiophène (PEDOT), a bénéficié de la stabilité du diazonium et des propriétés électrocatalytiques du PEDOT vis-à-vis de l'AA et de l'acide urique, deux antioxydants hydrophiles majeurs. L'optimisation des paramètres de modification de l'interface et la détermination des performances analytiques ont montré que la structure du polymère a une grande influence sur la réponse du capteur
The work here discussed is a fundamental study of the electrochemical reduction of the 4-nitrobenzene diazonium (NBD). Mechanistic and kinetic studies shed some light on the parts of the NBD reactivity and completed literature data about the subject. An NBD-functionalized antioxidant sensor has been envisaged, allowing the assay of ascorbic acid (AA). In a second time, a combined functionalization using a diazonium salt and a conductive polymer, the polyethylenedioxythiophene (PEDOT) coupled diazonium stability and electrocatalytic properties of PEDOT towards AA and uric acid, two major antioxidants. The modification parameters optimization of the interface and analytical performances determination highlighted the influence of the polymer structure on the sensor response

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Manca, Benedetto [Verfasser], i Franz [Akademischer Betreuer] Pedit. "DPW potentials for compact symmetric CMC surfaces in the 3-sphere / Benedetto Manca ; Betreuer: Franz Pedit". Tübingen : Universitätsbibliothek Tübingen, 2019. http://d-nb.info/119063967X/34.

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Części książek na temat "PEDOT Surface"

Zhou, J., J. He i M. Cada. "Optimal Design of Combined Distributed-Feedback/Fabry-Perot Structures for Vertical Cavity Surface Emitting Semiconductor Lasers". W Guided-Wave Optoelectronics, 75–81. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1039-4_12.

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Cheung, S. K., W. Huang, F. Jain, R. Sacks i T. Grudkowski. "Design and Analysis of Surface-Normal Fabry-Perot Optical Modulators in the Near Infrared (InGaAs/GaAs) and Blue-Green (ZnCdSe/ZnMgSSe) Regions". W Guided-Wave Optoelectronics, 269–78. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1039-4_33.

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Zheng, Deng-Yun, Meng-Hsiang Chang, Ci-Ling Pan, and Masahito i Oh-e. undefined. "Effects of O2 Plasma Treatments on the Photolithographic Patterning of PEDOT: PSS". W Surfaces, Interfaces and Coatings Technology. Vide Leaf, Hyderabad, 2021. http://dx.doi.org/10.37247/sict.1.2021.5.

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Streszczenia konferencji na temat "PEDOT Surface"

Li, You-Lan, Li-Wei Zheng, Hsin-Fei Meng i Peichen Yu. "Control Surface Templates for Solution-Processed Hybrid PEDOT: PSS - Silicon Solar Cell". W 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). IEEE, 2018. http://dx.doi.org/10.1109/pvsc.2018.8548233.

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Lv, Chen, Xiaojing Wang, Agalya Govindasamy, Hideyuki Tsuboi, Michihisa Koyama, Momoji Kubo i Akira Miyamoto. "Theoretical Investigation of the Electronic Properties of PEDOT: PSS Conducting Polymer on Indium Tin Dioxide (ITO) Surface: an Accelerated Quantum Chemical Molecular Dynamics Method". W 2004 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2004. http://dx.doi.org/10.7567/ssdm.2004.a-4-6.

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Lee, Ka Yeung Terence, Hani Naguib i Keryn Lian. "Flexible Multiwall Carbon Nano-Tubes/Conductive Polymer Composite Electrode for Supercapacitor Applications". W ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7735.

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The present paper investigates three types of electrically conductive polymers (ECPs), namely polyaniline, polypyrrole and poly(3,4-ethylenedioxythiophene) PEDOT composite with multi-walled carbon nanotubes (CNTs) for supercapacitor applications. Their capacitive performance has been evaluated in both three electrodes half-cell and two electrodes cell setup. The nanocomposite were fabricated by polymerizing pseudocapacitive conductive polymer onto the MWCNT surface through the in-situ chemical polymerization approach. The composites were aimed to be optimized through varying the ECPs to MWCNT ratios. Half-cell electrochemical study was conducted to determine the optimal proportion of MWCNT and ECP in this parametric study. Two electrodes cell electrochemical study unveiled the potential device’s energy storage performance. MWCNT was found to act as the framework for the polymerization of the ECP into a tubular structure. Among the three composites, Ppy/MWCNT composite showed superior supercapacitor characteristics at scan rates of up to 500mV/s.

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He, Yue, Shenglong Zhang, Ziqian Dong i Fang Li. "Conductive Polymer-Based Sensor for Soil Nutrient Detection". W ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24217.

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Abstract To increase the production of crops, chemical fertilizers are used in crop fields. However, underuse or overuse cannot increase crop yields but even decrease them and cause severe environmental problems. Thus, the detection and monitoring of chemical concentration are increasingly important. To build up and monitor a data-based system for a large area, such a method is costly and time-consuming. In this research, we developed a conductive polymer-based sensor to detect nitrate concentrations in soil water. Conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) was used as our sensing material. To increase its conductivity, we used the vacuum phase polymerization method to achieve a high conductive and stable polymer film. The conductivity of the polymer film is 500 S/cm. Our results have demonstrated that the conductive polymer-based sensors have high sensitivity to nitrate solution. The response to 1000 ppm nitrate solution is 47.2% (Response = (Initrate - IDIwate) / IDIwater). The sensors can detect nitrate range from 1ppm to 1000 ppm. The response time is less than 1 minute. This impedance-based sensor will eventually be integrated with the surface acoustic wave sensors, combined with an antenna and a GPR unit for low maintenance, autonomous, and in-situ soil nutrient sensing.

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Brunfeld, Andrei, Gregory Toker, Morey T. Roscrow, Jr. i Bryan Clark. "Micro Fabry-Perot sensor for surface measurement". W Optical Engineering + Applications, redaktorzy Joanna Schmit, Katherine Creath i Catherine E. Towers. SPIE, 2008. http://dx.doi.org/10.1117/12.798135.

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Hönig, D., S. Schneider, R. Domnick, M. Belzner, U. Beck, A. Hertwig, R. Stephanowitz i M. Weise. "Optical Layer Systems for Product Authentication:Interference, Scattering, Light Diffusion and Ellipsometric Encoding as Public, Hidden and Forensic Security Features". W 13th International Conference on Plasma Surface Engineering September 10 - 14, 2012, in Garmisch-Partenkirchen, Germany. Linköping University Electronic Press, 2013. http://dx.doi.org/10.3384/wcc2.177-180.

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Embedding of information on surfaces is state of the art for identification testing in which public, hidden and forensic features are used. In many instances, the legal authentication of a product, a material or a document is required. Among the surface-based encoded labels, bar codes and data matrices are most frequently applied. They are publicly visible. The material itself is irrelevant, only a sufficient optical contrast is required.However, a strong material dependence of the label can be achieved by means of Fabry-Perot layer stacks. Stack designs are described with regard to all three security levels: public features (e.g. color and tilt effect) perceptible by the human eye, hidden features (e.g. optical response in a given spectral range) detectable by commonly available instruments and forensic features (ellipsometric quantities ? and ? as a function of wavelength ? and angle of incidence AOI) only detectable by sophisticated instruments. Regarding material-correlated authentication, ellipsometric quantities ? and ? are used as encoded forensic features for the first time. Hence, Fabry-Perot layer stacks as information carriers in combination with imaging ellipsometry as optical read-out system provide all-in-one anti-counterfeiting capabilities.

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Cheung, S., i F. Jain. "Variable-reflectivity folded-cavity surface- emitting quantum-well laser". W OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.muu.5.

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A novel folded cavity surface emitting laser structure with variable reflectivity, consisting two oppositively 45°-flipped downward etched facets and a strained multiple quantum well (MQW) Fabry-Perot modulator, is proposed.

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Fauchet, P. M. "Fabrication and Properties of Ultrathin Films of Porous Silicon". W Microphysics of Surfaces: Nanoscale Processing. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/msnp.1995.msab2.

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We have manufactured thin films of light-emitting porous silicon (LEPSi) by electrochemical etching in HF and subsequently lifted them off the silicon wafer by an electropolishing step [1]. The film thickness was varied from 100 μm to 0.1 μm and the porosity ranged from < 40% to ≥ 90%. To insure the structural integrity of the thinner, higher porosity films, they were deposited on sapphire windows where they remain attached by van der Waals or electrostatic forces, in a manner reminiscent of earlier work with ultrathin film of III-V semiconductors [2]. The microstructural, chemical and optical properties of these films have been investigated using a variety of tools, including AFM, XRD, FTIR, cw and time-resolved absorption and luminescence measurements. These films are optically flat (see Fig. 1), do not scatter light, show pronounced Fabry-Perot interference fringes in the transparency region which can extend to photon energies well above the bandgap of crystalline silicon (see Fig. 2) and can have a refractive index as low as 1.2 to 1.3. The peak of the luminescence spectrum, which is determined by quantum size effects and surface chemistry, has no clear relation to the onset of absorption, which is dominated by the largest nanocrystallites. The broad luminescence spectrum splits into a few narrow peaks which are produced by multiple interference (see Fig. 3).

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Kalish, A. N., V. I. Belotelov, A. V. Gopal, A. S. Vengurlekar i A. K. Zvezdin. "Fabry-Perot surface plasmon polaritons in metal-dielectric gratings". W 2011 IEEE 11th International Conference on Laser and Fiber-Optical Networks Modeling (LFNM). IEEE, 2011. http://dx.doi.org/10.1109/lfnm.2011.6145031.

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Fox, Richard W. "Fabry-Perot temperature dependence and surface-mounted optical cavities". W Photonics North 2008, redaktorzy Réal Vallée, Michel Piché, Peter Mascher, Pavel Cheben, Daniel Côté, Sophie LaRochelle, Henry P. Schriemer, Jacques Albert i Tsuneyuki Ozaki. SPIE, 2008. http://dx.doi.org/10.1117/12.806850.

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