In this paper, an experimental study using time resolved imaging was reported to the expansion of vapor as well subsequent formation arc plasma during synthesis Cu nanoparticles by wire explosion process understand influences on characteristics produced means partial reheating vapor. Arc is known form after a delay or immediately depending ambience and pressure when supplied energy sufficient sustain plasma. Observations two expanding concentric cylinders one inside another in case delayed...

Abstract Silver nanoparticles (AgNPs) were synthesized in aqueous solutions by reduction of silver nitrate (AgNO 3 ) assisted a helium dc microplasma jet at atmospheric pressure without additional chemical reducing agents. Surfactant-free AgNPs obtained low initial AgNO precursor concentrations ≤0.5 mM. A surface plasmon resonance peak approximately 400 nm confirmed the presence AgNPs. At higher concentrations, sucrose was used to prevent agglomeration and cap growth nanoparticles. The...

Non-thermal plasma (NTP) devices produce excited and radical species that have higher energy levels than their ground state are utilized for various applications. There types of NTP devices, with dielectric barrier discharge (DBD) reactors being widely used. These DBD vary in geometrical configuration operating parameters, making a comparison performance terms power characteristics difficult. Therefore, this study proposes dimensionless parameter is related to the features, function respect...

A 50Hz glow discharge He/CH 4 plasma was generated and applied for the glass surface modification to reduce powder adhesion on wall of spray dryer.The hydrophobicity samples determined by water droplet contact angle weight glass, dependent CH flow rate exposure time.The presence 3 groups higher roughness treated were factors its development.Response methodology (RSM) results using central composite rotatable design (CCRD) showed that optimal responses obtained combination parameters, gas =...

The H mode transition and maintenance currents in a 13.56 MHz laboratory 6 turn planar coil inductively coupled plasma (ICP) reactor are simulated for low pressure argon discharge range of 0.02–0.3 mbar with neutral gas heating at ambient temperature. An experimentally fitted 3D power evolution plot 0.02 is also shown to visualize the effects hysteresis system. Comparisons between simulation experimental measurements show good agreement 0.02–0.1 only when considered. This suggests that plays...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation O. H. Chin, C. K. Lai, Y. Choo, S. Wong, R. M. Nor, L. Thong; Atmospheric pressure dielectric barrier discharges for sterilization surface treatment. AIP Conference Proceedings 24 April 2015; 1657 (1): 030008. https://doi.org/10.1063/1.4915158 Download citation file: Ris (Zotero) Reference Manager EasyBib...

The axial and radial magnetic field profiles in a 13.56 MHz (radio frequency) laboratory 6 turn planar coil inductively coupled plasma reactor are simulated with the consideration of effect neutral gas heating. Spatially resolved electron densities, temperatures, temperatures were obtained for simulation using empirically fitted density temperature heuristically determined temperature. Comparison between results measured fields indicates that heating plays an important role determining skin...

An atmospheric air non-thermal plasma (NTP) device is characterized in relation to ozone production.The electron density, n e , temperature, T and concentration are measured for three dielectric barrier discharge (DBD) geometries, i.e., ten tubes of 10 mm outer diameter (OD), six 25 OD, 40 OD.n deduced using optical emission spectroscopy via the line ratio method concentrations by an meter.ne were highest tube-40 configuration, showing a correlation between number charged particles production.

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Kanesh K. Jayapalan, Oi Hoong Chin; Measurement of neutral gas temperature in a 13.56 MHz inductively coupled plasma. AIP Conference Proceedings 24 April 2015; 1657 (1): 150003. https://doi.org/10.1063/1.4915242 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote...

Non-thermal atmospheric pressure plasma jet can easily be generated via a coplanar-coaxial dielectric (quartz tube) barrier discharge configuration driven by AC high voltage source at 11 kHz frequency in flowing argon gas. The was characterized its physical dimension, electrical and optical emission properties. It found that smaller diameter of the quartz tube produced jets shorter length. To generate maximum length for larger diameters, higher gas flow rate required. Increasing width active...

Dielectric barrier discharge (DBD) is advantageous in generating non-thermal plasma at atmospheric pressure, as it avoids transition to thermal arc and dispenses with costly vacuum system. It has found useful applications treating heat-sensitive materials such plastics living tissue. In this work, the formed between Pyrex glass layer ground electrode extruded through a nozzle form jet. The DBD characteristics were investigated terms of charge transferred mean power dissipated per cycle when...

An experimental study to investigate the effect of an external magnetic field on propagation ion-acoustic waves (IAWs) has been carried out in hydrogen plasma containing two-temperature electrons and dust grains. It is a first step understanding properties IAWs such environment. A low-pressure hot cathode discharge method chosen for production. The desired two-electron groups with distinct temperatures are achieved by inserting two cages cusp-shaped different surface strengths same chamber....

In this paper we describe the construction of a compact, low voltage flash X-ray tube. The device is powered by small 25 kV, 3300 pF capacitor. Its design vacuum spark configuration with hollow cathode. discharge triggered energy behind cathode; and triggering also main capacitor discharge. A 12 kΩ ballast resistor connected to auxiliary circuit limit its current. tube has been operated in air at pressures ranging from 10 -1 -4 mbar. At charging able produce pulses several kilowatts power.

Parallel plate dielectric barrier discharges consisting of two electrodes with glass (εr = 7.5) and alumina 9.0) as the were constructed. The system is powered by a variable 20 kV high voltage supply which capable delivering unipolar pulses at frequency 0.1–2.5 kHz sinusoidal voltages 6.5 above. At atmospheric pressure, exhibit either diffuse or filamentary appearance depending on parameters include series capacitance established varying air gap, material, voltages. This DBD built for study...

Heating of neutral gas in inductively coupled plasma (ICP) is known to result depletion. In this work, effect considered the simulation magnetic field distribution a 13.56 MHz planar coil ICP. Measured electron temperatures and densities at argon pressures 0.03, 0.07 0.2 mbar were used whilst heuristically fitted. The simulated results showed reasonable agreement with measured profile.