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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Journal of Physics: Theories and Applications
Mohd Khairul Ahmad
Universiti Tun Hussein Onn Malaysia
Control & Systems Engineering Education Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

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Dimmer and neon transformer as a power controllable generator for atmospheric pressure plasma jet Rosnah Mohd Zin; Chin Fhong Soon; Nadhia Mohd Yusof; Elfa Rizan Rizon; Kian Sek Tee; Mohd Khairul Ahmad; Nafarizal Nayan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 2: June 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (405.949 KB) | DOI: 10.11591/ijpeds.v10.i2.pp594-601

Abstract

The feasibility of a dimmer and neon transformer to provide power control to the atmospheric pressure plasma jet (APPJ) is presented in this paper. The standard neon transformer was previously shown applicable to power up a plasma torch to generate plasma irradiation of an APPJ at 8.64kv and 35kHz. However, the plasma emission is not controllable. In this study, a lamp dimmer was proposed to function as a power controller to the neon transformer which drives the generation of plasma and discharged with argon gas. With the dimmer output voltage adjustable from 60 - 220V, the power and current of the dimmer were variable from 8.4 to 83.6 W and 0.08 and 0.38 A, respectively. The temperature measured at the quartz tube and sample exposure site were less than 50oC suggested that the APPJ produced were non-thermal. A simple test by exposing plasma plume to a leaf sample showed that the plasma produced were non-damaging to the leaf. This portable system can provide control to the APPJ and applicable for bioengineering studies. 
Optical properties of dye DN-F05 as a good sensitizer Diani Galih Saputri; Agus Supriyanto; Mohd Khairul Ahmad; Nadiyah El-Haq Diyanahesa; Febrina Ramadhani
Journal of Physics: Theories and Applications Vol 3, No 2 (2019): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (511.679 KB) | DOI: 10.20961/jphystheor-appl.v3i2.38145

Abstract

This research studied the effect of adding synthetic dye DN-F05 (red dye) to electrical and optical properties. Dye-Sensitized Solar Cell (DSSC) sandwich components are consist of FTO/TiO2-Dye-elektrolit-Platina/FTO. In this study, the working electrodes were made by Titanium dioxide (TiO2) which was deposited on FTO glass and then annealed at 450oC for 30 minutes. The dye concentration DN-F05 was made with a mass of 0.001 gr, then will be stirred for 2 hours into 5 ml of ethanol at a temperature of 40oC. In this study the spin coating method is used with a rotational speed of 1000 rpm for 20 seconds. Characterization of optical properties was carried out using a UV-VIS spectrophotometer to determine the absorbance curve of dye and to get Gap energy. The peak absorbance value was obtained at wavelengths between 400-700 nm. This proved that the addition of DN-F05 dye concentration has a major influence on the optical properties.
Co-Authors Agus Supriyanto Chin Fhong Soon Diani Galih Saputri Elfa Rizan Rizon Febrina Ramadhani Kian Sek Tee Nadhia Mohd Yusof Nadiyah El-Haq Diyanahesa Nafarizal Nayan Rosnah Mohd Zin