Research List

No.	Researcher	Title	Abstract	Year
781	Amy Aung	EVALUATION OF THE STRUCTURAL AND OPTICAL CHARACTERISTICS OF ZINC OXIDE POWDER PREPARED BY CO-PRECIPITATION METHOD	In this research work, nano-sized Zinc Oxide powder (ZnO) were prepared by using Zinc Chloride and Sodium Hydroxide as the precursors and annealed at different temperatures at 400�C, 500�C and 600�C respectively. Structural and optical properties of the observable ZnO powders were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Ultraviolet visible spectrophotometer (UV-vis).By XRD analysis, Zinc Oxide revealed hexagonal wuritze structure nature. It was found that with increasing the annealing temperature the particle size increased about 38??~41 nm by using Debye Scherrer's equation. Lattice strain, c/a ratio and dislocation density parameters were obtained from XRD analysis results. According to the average crystallite size, the size of the particles increases as the annealing temperature is increased. The SEM results have visualized the morphology of ZnO nanoparticles with irregular spherical in shape and highly agglomerated. To investigate the optical results of the grown Zinc oxide, the absorption spectra are evaluated in the ultravioletvisible (UV-Vis) range. Based on the optical analysis results, the energy band gap of different annealing temperature samples was calculated from the linear extrapolated line of (?h?)2 vs. h? plot.	2020
782	Khin Nwe Oo	STRUCTURAL CHARACTERIZATION OF COBALT DOPED NICKEL FERRITES	Cobalt Doped Nickel Ferrites with the general formula Nix�1 Cox Fe2 O4 (x = 0.0, 0.1, 0.2 and 0.3) were prepared by self-combustion method and sol-gel method. Nickel II Nitrate Hexahydrate [Ni (NO3)2 6 H2O], Cobalt II Nitrate Hexahydrate [Co (NO3)2 6H2O] and Iron (III) Nanohydrate [Fe(NO3)3 9H2O] were used as the starting chemicals. The X-ray diffraction (XRD) analysis was carried out to investigate the crystalline phase formation. Microstructural properties were determined by SEM. Elemental composition characterization of prepared samples were performed by Energy Dispersive Spectroscopy(EDS).	2020
783	Ohnmar Soe	SYNTHESIS STRATEGY OF F:SnO2 POWDER FOR TCO-LESS DSSCs FABRICATION	In order to improve the photo catalytic properties, fluorine doped tin oxide (F: SnO2) nanopowder was synthesized by sol-gel auto-combustion process. The X-ray diffraction and SEM analysis have confirmed the formation of structure, the grain size and the morphology of nanoporous F:SnO2 powder. The synthesis strategy reflected from the microstructure has been investigated. In Dye Sensitized Solar Cells (DSSCs) fabrication, SnO2 is sensitized with chemical dyes to enhance its efficiency. UV-Vis response of pure and doped (F: SnO2) were investigated by using UV-1800 Shimadzu spectrophotometer. Some of these materials were applied in the fabrication of Dye Sensitized Solar Cells without Transparent Conductive Oxide layer (TCO-less DSSCs). The current-voltage measurements of the fabricated solar cells revealed the enhancement of energy conversion efficiency, long-term stability and cost effectiveness of DSSCs.	2020
784	Cho Cho Thet	COBALT FERRITE ADSORBENTSFOR THE EFFECTIVE ANDEFFICIENT REMOVALOF ARSENIC	The effective and efficient adsorbent for the removal of pentavalent arsenic (As5+) ions was presented in this paper. Cobalt ferrites, CoFe2O4, adsorbents were prepared by sonochemical synthesis method. The synthesis parameters including pH of the precursor solution and post annealing temperature, based on the formation of spinel cobalt ferrite were discussed. The compound identification, the crystal structure and surface morphology of cobalt ferrite were studied by Fourier transform infrared (FT-IR), X-ray diffraction (XRD) and Scanning electron microscope (SEM) analysis. The adsorption behaviour of As5+ ions on the cobalt ferrite has been investigated by batch adsorption method. The amount ofAs concentration adsorbed on cobalt ferrite is measured by atomic absorption spectroscopy coupled with hydride vapour generation (HVG-AAS).The adsorption capacity was fitted with the Langmuir isotherm model. The removal efficiency and adsorption amount of As determined from Langmuir isotherm model were discussed.	2020
785	Zayar Pyae Phyo Aung	SnO2 NANOFIBERS PHOTOANODE FOR ENHANCING THE PHOTOVOLTAIC PROPERTIES OF NATURAL DYE SENSITIZED SOLAR CELLS	Tin oxide (SnO2) nanofibers were successfully prepared by electrospinning homoheneous viscous solution of tin acetate in polyvinyl alcohol (PVA). The electrospun nanofibers are calcined at 600 ? C for 2 h. Structural, diameter in size and morphology of heat-treated SnO2 nanofibers were investigated in detail by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and Atomic Force Microscope (AFM). The optical properties of SnO2 nanofiber film was also studied by UV-Vis spectroscopy. The nanofiber was sensitized with natural dye and assembled into a DSSC. High performance carbon electrode was prepared onto ITO substrate and used as counter electrode. I-V characteristic was measured and conversion efficiency (?con) and fill factor (FF) were determined.SnO2 thin film will be deposited onto ITO (Indium doped tin oxide) coated glass substrate by spin coating technique. After that, the solar cell performance of DSSC with nanofibers will be measured and compared to those of DSSC with SnO2 thin film. According to the I-V measurement, the efficiency of SnO2 nanofibers based DSSC was greater than that of SnO2 thin film based DSSC. The SnO2 nanofiers based DSSC of TCD 12 cm gave the best efficiency and it was 2.71 %. The experimental findings resulted from this research work can be of great help for low-cost and Eco-friendly DSSC application.	2020
786	Kyaw Kyaw	SYNTHESIS AND ELECTRICAL PROPERTIES OF NANOCRYSTALLINE TITANIUM CARBIDE THIN FILMS	The main objective of this research work was to synthesize and to characterize structural and electrical properties of nanocrystalline titanium carbide thin films. The spin coating method was used to synthesis titanium carbide thin films, which were obtained from the HCl etching of MAX phase Ti3AlC2, The structural and morphological properties of the obtained films were characterized with XRD and SEM. EDXRF confirmed that aluminium (Al) was removed by etching, and the disappearance of Ti3AlC2 peaks were revealed from XRD profiles. From the SEM images it was revealed that the fabricated nanocrystalline films composed of several flakes and their sizes up to a few hundred nanometers. The typical microstructure of nanocrystalline titanium carbide thin films consisted of plate like grain and the grain size could be controlled by varying sintering temperature and time. Resistivity measurements were also performed with a four point probe method. The obtained results showed that nanocrystalline titanium carbide thin films could be used for transparent conductive electrodes.	2020
787	Aye Aye Myint	ANALYSIS OF CONSTITUENTS INAYEYARWADYRIVERWATER SAMPLES FROM MANDALAYAREA BY USING ENERGY DISPERSIVE X-Rays FLUORESCENCE (EDXRF)	In this paper, Ayeyarwady River water samples: River water sample 1, River water sample 2 and River water sample 3 were collected from Mandalay environ. The water samples were analyzed to determine the elemental concentration by using Energy Dispersive X-ray Fluorescence (EDXRF) spectrometer. Silicon (0.14% - 0.19%), sulfur (0.31% - 0.33%), potassium (0% - 0.01%), calcium (0% - 0.013%), iron (0 %- 0.001%) and samarium (0% - 0.001%) were detected by using XRF. The physico-chemical properties such as colour, pH, conductivity, alkalinity and total hardness of River water samples were also measured. These results were compared and discussed with WHO standards.	2020
788	Oak Kar Shin	HOW TO CONTROL SERVOMOTORS WITH POTENTIOMETER BY USING UNOARDUSIM V2.2 SOFTWARE FOR ROBOTIC SYSTEM	Servomotor can be controlled by potentiometer with UnoArduSimV2.2 software which consists of a circuit board and can be referred to as a microcontroller and a ready-made software called Arduino IDE which used write and upload the computer code to the physical board and it consists of many I/O devices, we can use inside in it. In this experiment, servo can be connected directly to an Arduino. This arduino can be controlled by four Potentiometer attached to it, each potentiometer is used to control each servo. When we turn the potentiometer, we got the analog value first, after converting this analog value to digital value, we got the degree how to turn the servo with. So we can use these servos by rotating the pots to pick and move the object from one place to another in robotic system. We will connect the power and ground pin directly to the Arduino 5V and GND pins. The PWM input will be connected to one of the Arduino�s digital output pins for servos and analog pins for potentiometer. After writing the sketch, compile, upload button and we can run my work inside in this software.	2020
789	Htwe Nwe Oo	GRAVITATIONAL COLLAPSE AND BLACK HOLES ON THE BRANE	Gravitational collapse is assumed to be one of the main problems in general relativity and astrophysics. Using simple the Taylor expansion into the bulk and black string concept one can acquire acceptable �tidal charge� black hole and continue to explore �total tidal charge�, physical mass and energy for the modified Friedmann model. Some numerical works of the interesting equations are implemented.	2020
790	Su Su Lwin	SYNTHESIS AND CHARACTERIZATION OF GRAPHENE OXIDE FILM	This research studied the synthesis of graphene oxide via a low-cost manufacturing method. The process started with the chemical oxidation of commercial graphite powder into graphene oxide (GO) by Hammer�s method. It is proven that this method is promising way to synthesize graphene oxide on a large scale. GO nanocomposites thin films have been successfully deposited on ITO glass substrate. The films were deposited by spin coating method and heat treated at 80�C for 24 h. The synthesized graphene oxide was analyzed by X-ray diffraction (XRD), Energy dispersive Xray (EDX), Fourier Transform Infrared spectroscopy (FTIR), UV-Vis spectroscopy and Field Emission Scanning Electron Microscopy (FESEM). The XRD pattern reveled a (0 0 1) diffraction peak, signifying the successful synthesis of GO. The elemental composition of GO was characterized by EDX analysis. The content of C is 67.35 % and the content of O is 29.75%. The mass ratio of C/O is 2.26. The results of FT-IR showed that C-O bond, O-H group with water molecules and C=C bond with graphene oxide. UV-Vis spectra of GO exhibited maximum absorption peak at 290 nm. SEM image confirmed that the size and synthesis of GO particles.	2020

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Myanmar Academy of Art & Science List of Research