Расширенный потенциал фотоплетизмографа местной конструкции для сосудистой неинвазивной диагностики

Advanced sensor device for shape analysis of the tissue-reflected mean single period photoplethysmography (PPG) signals have been designed and clinically tested. The PPG signal shape reveals individual features of the patient’s cardiovascular state. Clinical studies of several patient groups (e.g. diabetes mellitus, atherosclerosis obliterans, Raynaud’s syndrome) made it possible to specify components of the PPG signal that are sensitive to the corresponding organic or functional pathologies. Comparison of the right and left arm finger PPG signal shapes, for instance, appears to be an efficient tool for early screening of unilateral atherosclerosis obliterans.Данные, представленные в настоящем документе, подтверждают эффективность фотоплетизмографа-2 (FPG-2), используемого в диагностике неинвазивного анализа кровотока пульсирующей формы волны, которая была разработана и клинически апробирована. FPG формы сигнала выявили индивидуальные особенности сердечно-сосудистой системы пациента. Популяционные исследования (например, сахарный диабет, окклюзирующий атеросклероз, синдром Рейно), позволили определить различные компоненты сигнала фотоплетизмографа

Investigation Of Zinc Oxide Nanostructures Prepared By Chemical Deposition And Rapid Photo-Thermal Processing Technology

A novel and efficient low-temperature aqueous chemical method has been used to synthesize a new generation of smart and functional zinc oxide nanomaterials. The ZnO nanostructures are obtained and the physical and structural requirements of their applications in chemical sensors and solar cells are analyzed. Post-growth rapid photothermal annealing of nanostructures at 650°C in an atmosphere of N2 leads to the decrease in structure defects as compared to the as-grown nanostructures. The sensing behaviour of the nanostructured elements when exposed to 100 ppm ammonia is investigated. © 2007 IEEE

Comparative Study Of Hydrothermal Treatment And Thermal Annealing Effects On The Properties Of Electrodeposited Micro-Columnar Zno Thin Films

We report a comparison of the role played by different sample treatments, namely, a low-temperature hydrothermal treatment by hot H2O vapor in an autoclave versus thermal annealing in air on the properties of ZnO films grown by electrochemical deposition (ECD). Scanning electron microscopy studies reveal a homogeneous micro-columnar morphology and changes in the film surface for the two different treatments. It is found that post-growth hydrothermal treatments of ECD ZnO films at 150 °C under an aqueous environment enhance their structural and optical properties (photoluminescence, transmission, Raman spectra, etc.) similar to thermal annealing in air at higher temperatures (\u3e 200 °C). The modifications of the structural and optical properties of ZnO samples after thermal annealing in air in the temperature range of 150-600 °C are discussed. The removal of chlorine from the films by the hydrothermal treatment was evidenced which could be the main reason for the improvement of the film quality. The observation of the enhanced photoluminescence peak at 380 nm demonstrates the superior properties of the hydrothermally treated ZnO films as compared to the films annealed in air ambient at the same or higher temperature. This post-growth hydrothermal treatment would be useful for the realization of high performance optoelectronic devices on flexible supports which might not withstand at high temperature annealing treatments. © 2011 Elsevier B.V. All rights reseved

Comparative study of hydrothermal treatment and thermal annealing effects on the properties of electrodeposited micro-columnar ZnO thin films

We report a comparison of the role played by different sample treatments, namely, a low-temperature hydrothermal treatment by hot H2O vapor in an autoclave versus thermal annealing in air on the properties of ZnO films grown by electrochemical deposition (ECD). Scanning electron microscopy studies reveal a homogeneous micro-columnar morphology and changes in the film surface for the two different treatments. It is found that post-growth hydrothermal treatments of ECD ZnO films at 150 °C under an aqueous environment enhance their structural and optical properties (photoluminescence, transmission, Raman spectra, etc.) similar to thermal annealing in air at higher temperatures (> 200 °C). The modifications of the structural and optical properties of ZnO samples after thermal annealing in air in the temperature range of 150–600 °C are discussed. The removal of chlorine from the films by the hydrothermal treatment was evidenced which could be the main reason for the improvement of the film quality. The observation of the enhanced photoluminescence peak at 380 nm demonstrates the superior properties of the hydrothermally treated ZnO films as compared to the films annealed in air ambient at the same or higher temperature. This post-growth hydrothermal treatment would be useful for the realization of high performance optoelectronic devices on flexible supports which might not withstand at high temperature annealing treatments

Comparative study of hydrothermal treatment and thermal annealing effects on the properties of electrodeposited micro-columnar ZnO thin films, Thin Solid Films 519

We report a comparison of the role played by different sample treatments, namely, a low-temperature hydrothermal treatment by hot H 2 O vapor in an autoclave versus thermal annealing in air on the properties of ZnO films grown by electrochemical deposition (ECD). Scanning electron microscopy studies reveal a homogeneous micro-columnar morphology and changes in the film surface for the two different treatments. It is found that post-growth hydrothermal treatments of ECD ZnO films at 150°C under an aqueous environment enhance their structural and optical properties (photoluminescence, transmission, Raman spectra, etc.) similar to thermal annealing in air at higher temperatures (N 200°C). The modifications of the structural and optical properties of ZnO samples after thermal annealing in air in the temperature range of 150-600°C are discussed. The removal of chlorine from the films by the hydrothermal treatment was evidenced which could be the main reason for the improvement of the film quality. The observation of the enhanced photoluminescence peak at 380 nm demonstrates the superior properties of the hydrothermally treated ZnO films as compared to the films annealed in air ambient at the same or higher temperature. This post-growth hydrothermal treatment would be useful for the realization of high performance optoelectronic devices on flexible supports which might not withstand at high temperature annealing treatments

Nanostructured zinc oxide films synthesized by successive chemical solution deposition for gas sensor applications

Nanostructured ZnO thin films have been deposited using a successive chemical solution deposition method. The structural, morphological, electrical and sensing properties of the films were studied for different concentrations of Al-dopant and were analyzed as a function of rapid photothermal processing temperatures. The films were investigated by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron and micro-Raman spectroscopy. Electrical and gas sensitivity measurements were conducted as well. The average grain size is 240 and 224 Å for undoped ZnO and Al-doped ZnO films, respectively. We demonstrate that rapid photothermal processing is an efficient method for improving the quality of nanostructured ZnO films. Nanostructured ZnO films doped with Al showed a higher sensitivity to carbon dioxide than undoped ZnO films. The correlations between material compositions, microstructures of the films and the properties of the gas sensors are discussed