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Atmospheric pressure plasma jets (APPJs) are widely investigated for plasma assisted medical treatments due to their versatility, granted by the diverse possible combinations of driving power supply, gas employed and source architecture.
Plasma application for environment improvement is desirable. In order to improve the efficiency of toxic gas decomposition by plasma, it is worthwhile to clarify the behavior of radicals in non-thermal plasma. Although previous studies have revealed the behavior of radical densities and temperatures in atmospheric discharge, they are not yet connected to apprehension or simulation of practical toxic...
This paper reports an electrical and optical characterization study of an atmospheric pressure plasma generator used for decontaminating endoscopic channels. In order to sustain such plasma in a narrow channel of up to one meter, two electrode configurations are discussed. Plasma characteristics such as the discharge current, dissipated power, gas temperature are measured, together with optical emission...
This paper describes recent experiments to study self-produced vacuum ultraviolet (VUV) emission from pulsed atmospheric plasma structures. While it has been classically believed that photo-ionization plays a significant role on plasma generation during fast timescales (i.e. streamers), the exact role of VUV radiation (energy greater than 7 eV) has only recently been explored and is currently an area...
This study investigates the modification of TiO2 ceramics by ECR microwave plasma treatment using Ar, O2, and Ar-O2 mixtures at different bias voltages. Wetting contact angle, optical, and microscopic measurements are performed to show the effects of UV irradiation with and without ion bombardment on the TiO2 surface properties. Results show the occurence of nano-titania particles on the surfaces...
Summary form only given. Atmospheric pressure non-equilibrium plasmas are now used in many applications including those where low-pressure plasmas have traditionally been used. However, measurements of key plasma parameters in the highly collisional regime exhibited at atmospheric pressure offer challenges, which usually have to satisfy requirements that are different than those found at low pressures...
This paper presents a new approach to the modification of materials surfaces using an atmospheric dielectric barrier discharge plasma jet. The emission spectral lines and the macroscopic plasma temperature of argon plasma jet are obtained using the spectral diagnostics method and the liquid-in-glass thermometer, respectively. Results show that electron excitation temperature and the macroscopic temperature...
Objective-type total internal reflection fluorescence technique and Gaussian fit single particle tracking algorithm have been used to study the constrained Brownian motion characteristics of single fluorescent microspheres of 40 nm diameter in real-time. Three-dimensional tracking has been realized from the two-dimensional images by utilizing the exponential decay of the fluorescence intensity excited...
The purpose of this study was to explore the time course of cerebral lactate concentration in ischemic rat brain after sacrifice, in which area the morphology signal was still normal in the early phase. Ischemic rat model was used in this study. Eighty rats were fasted overnight before sacrifice and divided into 16 groups randomly. Lactate concentration was measured by using LD kit. Results showed...
The polycrystalline samples of BaSi2, SrSi2, and LaSi were prepared by spark plasma sintering (SPS). The electrical resistivity (rho) and Seebeck coefficient (S) were measured above room temperature. The S of BaSi2 was negative and the absolute values were rather high (-669 muVK-1 at 337 K). The S of SrSi2 was positive and the absolute values were lower (118 muVK-1 at 332 K) than those of BaSi2. For...
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