This work presents an investigation on UV radiation on conductive copolymer regio-regular poly(3-hexyltiophene) (rr- P3HT) and its mixture with zinc oxide nanomaterial as an organic-inorganic blend, which was used as a sensing layer for organic thin film transistor or chemoresistor for gas sensing. Morphology like sample roughness, zinc oxide particles distribution and electrical properties were measured of obtained thin film deposited on TFT substrate using airbrush method. The study shows that there is a significant influence on operating parameters of OTFT by the irradiation of UV light. Given results shows the possibility of using such polymer blend in the implementation of gas sensing applications.
Nafion® is well known copolymer from DuPont that is used as a material for membrane in fuel cells. It is also known as sensing component in different gas and humidity sensors[1]. This copolymer was used to humidity sensor fabrication. Proposed sensor is build as thin layer of Nafion® copolymer dipped on quartz resonator making mikrobalance scale.
In this work we present a sensor responses in change of its resonance frequency due to the humidity change from 20% to 80% of RH. The sensor frequency is measured in microprocessor controlled environment to maintain faster response of the sensor. Sensed gas temperature must be measured to compensate temperature drift.
This work presents an investigation on the influence of different factors on conductive graft comb copolymer polymethylsiloxane (PMS) with poly(3-hexyltiophene) (P3HT) and poly(ethylene) glycol (PEG) or dodec-1-en as functional side groups grafted on poly(methylhydrosiloxane) backbone. The analysed factors that influenced the parameters of the layers were temperature and different gas atmosphere (N2, NO2). Samples were measured by spectroscopic ellipsometry under the influence of a gas atmosphere. Moreover, morphology (sample roughness) and optical properties (refractive index, extinction coefficient) were measured of obtained thin films deposited on glass substrate using spin coating method. The study showed that obtained thin films of copolymers shows the possibility of using such polymers in the implementation of gas sensing structures.
A precision classification of neoplastic change plays very important role in cancer diagnosis. Because of constantly
developing technology, the amount of information received is also increased. The ability to distinguish between tumor
classes (in different kind of tissues) by using spectra data is an novel and promising approach to cancer classification. In
this paper, we present a classification spectra data by k-Nearest Neighbor (kNN) method, which can and will be used for
luminescence spectroscopy skin cancer diagnosis system.
This work presents an investigation on conductive graft comb copolymer like SILPEG CH9 with carbon materials like graphite oxide or reduced graphite oxide. Morphology and optical properties like sample roughness, graphite oxide particles distribution, optical transmittance were measured of obtained thin films deposited on glass substrate using spin coating method. The study showed that obtained thin films are repeatable, convenient to process, and their parameters can be easy changed by the spin rate regulation during the deposition. Given results shows the possibility of using such polymer blend in the implementation of organic photovoltaic cells and different optoelectronics applications.
In the paper the planar waveguide based on SU-8 polymer were made on 2μm of silica (SiO2) on silicon (Si) substrates in order to obtain base for broadband interferometer. Analysis and calculation of sensitivity for single mode broadband differential interferometer were performed. Paper presents preliminary tests and analysis of such structures. Dilution of SU-8 solution for obtaining thin layer (below 500 nm) followed by elipsometric measurements is presented.
In this paper we propose low cost and easy in development fully working dye-sensitized solar cell module made with use of a different sensitizing dyes (various anthocyanins and P3HT) for increasing the absorption spectrum, transparent conducting substrates (vaccum spattered chromium and gold), nanometer sized TiO2 film, iodide and methyl viologen dichloride based electrolyte, and a counter electrode (vaccum spattered platinum or carbon). Moreover, some of the different technologies and optimization manufacturing processes were elaborated for energy efficiency increase and were presented in this paper.
In the paper the planar waveguide based on SU-8 polymer were made on different substrates. As polymer layer Gerseltec SU8 GM1040 and Microchem SU8 2000.5 were used. By using Gerseltec SU8 GM1040 we obtained layer with thickness 950 nm which gave us planar waveguide bimodal structure for λ=633nm. By using Microchem SU8 2000.5 we obtained layer thickness 450 nm which gave us single mode waveguide structure for λ=633nm. As substrate we used 2μm of SiO2 on Si and standard microscope glass (soda-lime glass). Additionally the authors performed measurements for characterization of optical and physical properties of obtained layers. We measured layer thickness by Atomic Force Microscope (AFM) and by ellipsometer. Ellipsometry measurement also gave us refractive indices of waveguide layer and substrate. We also performed measurement of effective refractive index and attenuation of waveguide layers. Additionally we performed SEM measurement for checking layers adhesion.
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