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In this study, we propose a novel sensing device for small olfactory chips which can be installed on mobile such as smart phone. The device comprises gas-sensitive films deposited on surface potential sensor arrays, which is integrated in a single chip with the area of 7.3 mm2. The chip has 128 × 128 elements with the element size of 37.30 × 37.30 pm2. Three kinds of the gas-sensitive film were separately...
The conversion of solar energy into electricity is one of the viable alternatives regarding energy demand and sustainability. This work shows that novel energy storage devices can be developed by using materials containing highly polarizable molecules as poly{1-(4-(3-carboxy-4-hydroxy-phenylazo) benzenesulfonamido) −1,2-ethanediyl, sodium salt} (PAZO). In the present case, layer-by-layer (LbL) of...
We have developed a novel simulator for chemical mechanical planarization processes, based on the one variant of Monte-Carlo method. It implemented the several input parameters: pressure, diameters of abrasives, temperature, linear velocity of abrasives, and easiness to remove materials. This simulator reproduced the linear change in the amounts of the polished portions of materials with pressure*linear...
Manganese oxide films are electrodeposited on nickel foams from acetate solutions at 70°Cusing cyclic voltammetric (CV) and potentiostatic techniques (PS) in sequence. The effect of post heating temperature (PHT) in the range of 100–300°C on the morphologies and capacitive behaviors of the oxide electrodes are investigated. Raman spectra (RS) suggest that the structure of manganese oxides change with...
Sensor elements based on composite films of poly-3, 4-ethylenedioxythiophene combined with nanocrystals of porous silicon and zinc oxide were created. Increasing of nanocomposite electrical resistance due to adsorption of ammonia and ethanol molecules was registered. To evaluate the sensor properties, adsorption sensitivity of obtained composite films was calculated and their dynamic characteristics...
Cadmium sulfide thin films have been deposited by successive ionic layer adsorption and reaction method from ethanol-aqueous solutions. The films were deposited on glass substrates. The cadmium sulfide films have been characterized by transmission spectra. Thicknesses of layers were found by AFM microscopy of partially etched film.
In this work we study equilibrium and kinetic adsorption process of Methylene Blue (MB) and Copper phthalocyanine (CuPhTh) dyes on TiO2 thin films. We synthesized phthalocyanines through Achar method; dyes were characterized by Fourier-Transform Infrared spectroscopy (FTIR) and Diffuse reflectance. TiO2 thin films were fabricated by Doctor Blade method for using Degussa P25 as TiO2 source. We used...
The adsorption equilibrium and Kinetic modelling of pigment extracted from Fenugreek after degumming on macroporous resins LS-46 was investigated under differentinitial concentrations. The suitability of the Freundlich and Langmuir adsorption models to the equilibrium data was investigated. The model fitness was determined by R2. Kinetic analyses were conducted using pseudo firstand second-order models...
Dye-sensitized solar cells (DSSCs) are being a potential technology for application in solar energy and photovoltaic processes. Its light harvesting and photocurrent generation are highly dependent on the nanostructured semiconductor film and the mode of dye adsorption. The N-doped TiO2 with mesoporous structure, which synthesized through one step templating sol gel method using amine group containing...
The effect of viscosity on the heat and mass transfer of NH3/H2O falling film absorption with Fe2O3 nanofluid is studied. The results show that, the viscosity, influenced by the ingredient of nanofluid, directly influence the performance of absorption. The heat and mass transfer of absorption, is weakened by high viscosity nanofluid of only adding sodium dodecyl benzene sulfonate (SDBS), while, enhanced...
The studies in recent years about performance reinforcement in the ammonia falling film absorption are introduced in this paper. The enhancement methods and absorption performance influencing factors are summarized and analyzed. Some deficiencies in this research field are pointed out and future research directions are also discussed. It is pointed out that a combination way of physical treatment,...
A method to fabricate the porous glass ceramic microspheres is reported. The fabricated glass microspheres and the porous glass ceramic microspheres are characterized by scanning electroscopy (SEM) and transmission electron microscopy (TEM), respectively. The sizes of glass microspheres and the pore diameters of the porous glass ceramic microspheres are estimated, respectively. The adsorption properties...
A micro gas preconcentrator which has a single walled carbon nanotube (SWNT) film as a sorbent material was fabricated by MEMS technology. This work is the first to investigate the performance of SWNTs in the preconcentrator by evaluating their adsorption capacity. Octane adsorption experiments were carried out for 60 minutes on the newly fabricated preconcentrator and the concentration factor was...
In this paper we use micromachined, high-frequency, quartz bulk acoustic wave resonators to systematically study the physical and viscoelastic properties of spontaneously adsorbed globular protein films with molecular weights (MW) spanning two orders of magnitude. Specifically, changes in the frequency and the β-factor of the micromachined resonator array were studied as a function of concentration...
TiO2 is the most frequently employed photocatalyst in realising complete mineralization of organic pollutants in water treatment. Its large bandgap energy necessitates though UV excitation to induce charge separation within the particle. Nitrogen doped into substitutional sites of TiO2 has shown bandgap narrowing and photocatalytic activity in the visible light. N-doped and non-doped mesoporous titania...
Experimental results of the triboelectric charging of insulators have variously been interpreted in terms of either electron or ion exchange, but the field is fraught with contradictions and it remains one of the least understood areas of solid state physics. We approached this contentious issue from the point of view of charge penetration depth (CPD) into the surfaces of insulators. Hitherto, it...
Traditionally, low-powered, room temperature sensing of gaseous hydrogen (H2) is difficult. With renewed interest in H2 as a source of energy, there is a need for reliable, energy-efficient sensors. A potential solution can be found in using surface acoustic wave (SAW) devices, which have been implemented as passive, wireless RFID tag-sensors. Thus, in concept, it is advantageous to develop a SAW...
The experiment increases SO2 absorption capability through increasing the contact probability and transfer impetus between liquid and flue gas using different pH control and retrofitted multi-stage water film. The project designs orthogonal test program of 5 levels/6 factors using SPSS13.0 and has tested. The experiment then does single factor's research based on the orthogonal test conclusion using...
Humic acid (HA) was considered to be the main precursor of disinfection by-products (DBPs) in chlorination. In this study, an effective and economic method of preparing TiO2 film was successfully developed for adsorption of HA. The crystal structure and surface morphology of the TiO2 film were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The effects of some factors such...
Perfluorooctane sulfonate (PFOS) has increasingly attracted global concerns in recent years and has also been proposed as the candidates of persistent organic pollutants due to their world-wide distribution, environmental persistence and bioaccumulation potential. The adsorption mechanism of PFOS from aqueous solutions onto granular activated carbon (GAC) was investigated. The adsorption reaction...
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