International Journal of Nanoelectronics and Materials (IJNeaM)
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IJNeaM aims to publish original work of importance in the fields of nanoscience and engineering. Topics covered including Theoretical, Simulation, Synthesis, Design and Fabrication of Nanomaterials and Nanodevices; Metals, Insulators, and Semiconductors with a focus on Electronic, Structural, Magnetic, Optical, Thermal, Transport, Mechanical and other properties for the specialists in Engineering, Chemistry, Physics and Materials Science. IJNeaM accepts submission in the form of Reviews, Research Articles, Short Communications, and selected conference papers.
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PublicationStructural, optical properties and Raman Spectroscopy of In₂O₃ Doped LiTaO₃ thin films(Universiti Malaysia Perlis (UniMAP), 2022-01)In this experiment, undoped, 2 wt.%, 4 wt.% and 6 wt.% In₂O₃ doped LiTaO₃ thin films were successfully prepared by utilizing a spin coater to carry out chemical solution deposition on the substrate surface (CSD method). The films were grown on the p-type Si (100) substrates with 2 M in 2-methoxyethanol precursor, whose solubility was twisted at 4000 rpm for 30 seconds. Crystalline formation of the films was carried out at annealing temperature 850 oC, held for 15 hours at a temperature rise rate of 1.67 oC/min. In term of XRD analysis, the structural properties of LiTaO₃ thin film undergo increment in crystallite size and lattice parameter values as the concentration of indium doping increase. The optical properties and Raman spectra of the films were then obtained using UV-Vis spectrometer and Raman spectroscopy. From the XRD measurement, the result shows a hexagonal crystal structure with lattice parameters a = 5.032-5.051 Å and c = 13.643-13.676 Å, and from the UV-Vis data, we observed that the films have a 5.034-5.184 Ev energy gap with 1.70364373 – 1.70364377 refractive index. Raman analysis produces peaks of LiTaO₃, A1TO10 (In₂O₃) and A1LO10 (In2O3). Based on the characterization results, it can be concluded that the 6 wt% In₂O₃ doped LiTaO₃ thin films are very promising for application as a light sensor.
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PublicationSynthesis and characterizations of nano magnetic particles (Co-Ni Fe₂O₄) Ferrite by co-precipitation and biomedical application( 2023-01)Characterization of Cox-1Nix Fe₂O₄ nanoparticles (NPs) employing X-ray diffraction and field emission scanning electron microscopy (FESEM) was accomplished simply by chemical coprecipitation, FTIR and finally the Magnetic Resonance Spectrometer (VSM), the singlephase cubic spinel structure in X-ray diffraction. In FESEM, micrographs of Co ferrites nanoparticles that are virtually spherical can be seen with grain sizes of less than 20 nm. Two absorption bands are visible in the FTIR spectrum, with values ranging from 400-600 cm. These beams show that all of the samples have a ferrite spectral composition. Preparation of samples yielded M-H curves because of the tight turn, which means the paper samples are soft magnetic material in the VSM. Antibacterial activity of Cox-1Nix Fe₂O₄ NPs in limiting the development of isolated pathogenic bacteria Staphylococcus aureus and E. coli was studied to compare their effects with the traditional antibiotics used before. Using Cox-1Nix Fe₂O₄ nanoparticles, it has been found that the nanoparticles release ions into the environment, which interacts with the group (-SH) of proteins, resulting in the defection of bacteria's cell membranes and the subsequent cell death.
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PublicationSynthesis of MWCNTs-TiO₂ photocatalytic nanocomposite membrane via In-situ colloidal precipitation method for methyl orange removal(Universiti Malaysia Perlis (UniMAP), 2022-07)This research aims to examine the performance of photocatalytic nanocomposite membrane for methyl orange dye (MO) removal. Multiwalled carbon nanotubes (MWCNTs) and titanium dioxide (TiO₂) are used as nanofillers to produce photocatalytic membranes via insitu colloidal precipitation method. The weight ratio of MWCNT:TiO₂ were manipulated at 10:0, 5:5, and 0:10 with nanomaterials concentration of 0.1 g/L. The membranes were characterized by surface hydrophilicity, porosity and pore size, and surface charge. The membrane performance was assessed using dead-end membrane filtration method to determine water permeability, dye rejection, and fouling propensity. Pure TiO₂ membrane improved water permeability by 22.57% due to increasing hydrophilicity and large porosity. For dye rejection, pristine membrane outperformed the nanocomposite membranes with a rejection of 25.52% due to the small membrane pore size by sieve mechanism. Lastly, all the nanocomposite membranes showed better antifouling properties with higher normalized flux for pure MWCNTs (0.6822), TiO₂ (0.6781), MWCNT/TiO₂ (0.7239) membranes relative to the pristine membrane (0.6039). The pure TiO₂ membrane has the highest improvement in flux recovery (19.87%) due to dye photodegradation under UV light assisted in membrane cleaning and defouling. Overall, this study demonstrates that photocatalytic nanocomposite membrane can be produced via in-situ colloidal precipitation method.
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PublicationSolutions-Processed Cu₂ZnSnS₄ solar cell utilizing Zn powder as local material(Universiti Malaysia Perlis (UniMAP), 2021-10)Indonesia, as any other countries, requires high electrical energy consumption. The primary electrical supply in Indonesia is dominated by the limited and high pollution fossil fuel. Solar energy is needed as alternative renewable energy to overcome the limited fossil fuels. The Cu2ZnSnS4 (CZTS) as an absorber is a good material due to its non-toxic property, environmentally friendly, low cost and elemental abundance. CZTS solar cells have a high theoretical efficiency of up to 30.9%. The abundance of mineral resources in Indonesia (especially 99% Zinc powder) is utilized for the first time to replace the standard material from Zinc Acetate Dihydrate. Cu-poor Zn-rich CZTS/CdS/ITO is made using Zinc local material compared to the Zinc Acetate Dihydrate. The fabrication technique is carried out using a solution-processed method and spin-coating deposition. The Zn to Sn ratio is investigated towards the crystallinity, morphology, optical properties and cell performance. The result shows that Zinc local material in the CZTS absorber increases the percentage of kesterite phase by 0.3 % compared to Zinc acetate (standard material) and increases the crystallite size by 38.26 nm. The best cell has an efficiency of 5.10 ×10-4 % for Z125 sample (Zn/Sn ratio of 1.25) due to better crystallinity, morphology, optical properties.
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PublicationThe thermal, surface chemical, and electrical properties of BiFe1-xZnxO3 (x = 0, 0.06, 0.12) Nanocrystalline through Sol-gel Technique(Universiti Malaysia Perlis (UniMAP), 2021-07)The synthesis of zinc doped bismuth ferrite has been successfully carried out using the sol- gel autocombustion method. The thermal properties through the TGA test showed that the mass began to stabilize in the range of temperature 600 - 750°C as the indication of the formation of single-phase BiFe0.88Zn0.12O3 nanocrystalline. It is obtained from the SEM test that the surface shape of BiFeO3 of zinc doping indicated that it was not homogeneous and there was clotting. Through the EDS test, it is shown the ratio of (% wt) Bi : Fe between calculations and experiments of 1:1 which indicates a stoichiometric reaction. The XPS study found Zn2p element has entered the Fe2p element. The electrical properties through the LCR test showed that the existence of Zn doped BiFeO3 nanocrystalline reduces the dielectric constant value at a frequency of 100 kHz - 1 MHz. The dielectric constant values are stable at high frequency which can potentially be applied to electromagnetic waves.