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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PublicationThermo-mechanical and adhesion performance of silver-filled conductive polymer composite (SFCP) using thermoplastic polyurethane (TPU) substrate(Universiti Malaysia Perlis (UniMAP), 2020-05)Emerging of conductive metal filler in nanoscale like Silver-Filled Conductive Polymer Composite (SFCP) ink is one of the important technology for electronic interconnects future. Among the key challenges in the successful development of such materials are to offer high electrical conductivity and good adhesion in polymer-based substrates without compromising on the mechanical reliability of such devices. This paper discussed the characteristics of Thermoplastic Polyurethane (TPU) based-materials in terms of their sustainability, wettability and SFCP conductivity of thermal effect (room temperature – 25°C), 40°C, 60°C and 80°C). The experimental work involved electrical conductivity measurement using a Four-Point Probe, contact angle measurement and surface roughness analysis. Surface morphology analysis was carried out by using Axioscope 2MAT Optical Microscope and Scanning Electron Microscopic (SEM). The results show that sheet resistance of SFCP increased with an increasing strain and decrease with the increasing of temperature. The above results were observed due to the crack formation against strain but the presents of temperature cause the silver (Ag) particle to expand, filled the gap and form network path for electrical conduction even at maximum temperature and strain (80°C at 80%). Moreover, the TPU shows low wettability that exhibits poor adhesion between SFCP and TPU substrate due to reducing in the contact area between adhesive and substrate that cause the surface has low surface energy when exposed to variation of temperature.
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PublicationRemoval of phenol from water using ZnO nanoparticles(Universiti Malaysia Perlis (UniMAP), 2020-01)Zinc oxide (ZnO) nanoparticles were prepared using Pulsed Laser Ablation (PLA) method with various laser energies of 100, 200, 300, 400 and 500 mJ for removing organic pollutants (phenol) from water solutions. The acquisition of ZnO nanoparticles with nanoparticle size was confirmed using XRD tests. Zeta Potential (Z.P.) tests showed that the prepared nanoparticles were electrically unstable. The prepared particles were used to remove the dissolved solvent (phenol) in the water resulting from many industries. Results showed that the obtained removal percentage of organic pollutants (phenols) ranges from 90% to 93.86%.
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PublicationCharacterisation of laser-treated Ag, Al, and Al/Ag metal thin films deposited by DC sputtering(Universiti Malaysia Perlis (UniMAP), 2020-01)Structural, optical and electrical properties of Nd:YAG pulsed laser-treated silver (Ag), Aluminium (Al) and Al/Ag bi-layer metal thin films deposited by Direct Current (DC) sputtering technique is investigated. Laser-metal interaction treatment as an alternative to temperature annealing was used to treat the surface of the metal thin films. Measurements from X-ray Diffraction (XRD) indicated an enhanced grain growth and crystallisation for the laser-treated thin films with strong and dominant Ag diffraction peaks at (111) and (200) crystal planes from Ag and Al/Ag films. The surface roughness of Ag and Al thin films increased when exposed to 120 mJ laser energy as measured by Atomic Force Microscopy (AFM). However, smooth surface and reduction in surface roughness were observed when under-layer Al film was deposited below the Ag thin films (Al/Ag bi-layer). The bi-layer Al/Ag film shows a reduced reflectance in most of the visible range as determined by UV-vis spectrophotometer. Surface to volume atomic ratio of the laser-treated films increased with a decrease in resistivity as examined by four-point probes. All the Nd:YAG laser-treated metal films show a significant decrease in resistivity, sheet resistance and optical reflectance indicating possible application as intermediate layer in transparent conductive oxide (TCO/Metal/TCO) electrode for solar cell devices.
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PublicationNano-particle doped polymers to improve contact lenses optical quality(Universiti Malaysia Perlis (UniMAP), 2020-01)Polymer-based nanocomposites exhibit different optical virtues such as high refractive index (RI), Abbe number (νd) and visible light transmittance (T %) above 90%. These hybrid materials attract more interest in optoelectronic applications such in the ophthalmic optics. The aim of this work is to study the impact of contact lenses doped with aluminum nanoparticles on aberrated human eye. ZEMAX mainstream optical design software was used for eye modeling based on Liou & Brennan eye model and then the BHESP/PA/AL contact lens was applied. Ocular performance was evaluated by modulation transfer function (MTF), spot diagram root mean square (RMS) and the geometric encircled energy (EE) metrics. The used criteria show that the best visual performance is obtained when BHESP/PA/AL-CL is used (P < 0.0001) because it reduced the generated monochromatic and polychromatic aberrations inside the eye. The required balance between the refractive index and abbe number of the chosen polymer affect the transparency, transmittance and refractive errors correction.
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PublicationInvestigation of wear behavior for novel polyamide 66 composites under dry sliding conditions(Universiti Malaysia Perlis (UniMAP), 2020-01)Polyamide 66 has been recently used in mechanical applications especially in gears manufacturing due to their low weight, low cost, and good tribological characteristics. In particular, great attention must be considered on the specific wear rate for polyamide 66 and their composites under dry sliding conditions. The goal of this paper is to study the effect of wear parameters; applied load, sliding distance and thermal effects on specific wear rate for neat polyamide 66 and their composites after adding 1% wt CNT or 30% wt (CF) under dry sliding conditions as well as, study the effect of the reinforcement materials on the hardness and their relationship to specific wear rate. The experimental result shows that the increase in wear parameters leads to increase the specific wear rate. However, with the addition of 1% wt CNT or 30% wt (CF) increasing the wear resistance by 130% and 200% under (30N) applied load and by 107% and 144% under (4000m) sliding distance respectively. Moreover, significant increase in hardness explained the enhancement in wear resistance. A scanning electron microscopy was done for the harmed specimen surfaces and the images appeared that the addition of reinforcement materials gives smooth surfaces with little harm unlike neat polyamide 66.