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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PublicationElectrical and microstructural properties of silver thin films(Universiti Malaysia Perlis (UniMAP), 2019-04)The growth, structure and electrical properties of evaporated thin silver (Ag) films have been extensively investigated over the years because it has the highest electrical conductivity among all metals. The Ag thin films have been studied by thermal evaporation on glass, mica and Teflon. The thickness of Ag films in this investigation is in the range of 10-150 nm. The electrical properties include measurement of resistivity, the temperature coefficient of resistance (TCR), and activation energy (Ea) as a function of film thickness (t) have been studied. The experimental results are analyzed in the light of Fuchs-Sondheimer (FS) and Mayadas-Shatzkes (MS) theories. The resistivity of infinitely thick Ag film and TCR are found to be 3.53 × 10⁻⁸ Ω-m and 3.73 × 10⁻³ /°C, respectively. The mean free path of conduction electron calculated from the resistivity and TCR data are 42.8 nm and 26.28 nm, respectively. A study on the initial stages of growth of Ag films and its microstructural properties has been conducted using a Scanning Electron Microscope (SEM) for films grown on different substrates and thickness.
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PublicationLow-cost synthesis approach for reversible authenticator circuits in QCA environment(Universiti Malaysia Perlis (UniMAP), 2019-04)Recently, Quantum-dot Cellular Automata (QCA) based reversible logic circuit has an enormous benefit over CMOS based logic circuit. As a promising technology for Nanoelectronics computing, reversible-QCA has gained more and more attention from researchers around the world. In this paper, a reversible authenticator circuit based on QCA was implemented. This article presents a Nano-authenticator circuit to verify the authenticated and unauthenticated inputs. The proposed QCA designs have been implemented in a different manner from existing designs, which are primarily based on a coplanar design approach. The efficiency of QCA design has been investigated based on parameters such as cell count, area, and latency. Furthermore, missing an additional cell defect of the reversible authenticator has been analyzed, and covers the fault tolerance of 60.41% and 75%, respectively. In addition, the proposed Feynman gate in QCA environment achieves 76.35% area, 12.5% cell count and 95.55% average energy dissipation improvement as compared to the existing layout. Moreover, the new reversible authentication circuit achieves 87.75% cost and 43.54% area improvement in comparison with the previous state-of-art design.
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PublicationCharacterization of musaceae and saccharum officinarum cellulose fibers for composite application(Universiti Malaysia Perlis (UniMAP), 2019-04)This paper presents experimental results on the effect of alkalis such as Potassium Hydroxide (KOH) and Sodium Hydroxide (NaOH) on morphological changes, physical, heat resistance, chemical, and tensile properties of the Musaceae (PF) and Saccharum Officinarum (BF) rods fibreers. Modified fibers were made using a chemical solution of NaOH and KOH with a concentration of 8% for 2 hours. Physical, chemical, thermal and tensile properties were characterized by density, chemical composition, tensile, and thermogravimetric tests. The surface structure of the fibers was analyzed by SEM. The results show that both fibers have superior properties in terms of tensile strength, and thermal resistance after chemical treatment because hemicellulose and lignin were reduced from the fibers. The superiority of Musaceae fibers was obtained after chemical treatment with KOH while the best properties of Saccharum fiber were obtained after alkali treatment with NaOH. The Scanning Electronic Microscopy (SEM) image also shows that the fiber surface becomes coarse and fibrils. The results show that the effect of alkalis provides a thorough change in terms of properties and morphologies on different fibers.
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PublicationThe effect of SrO doping on LaFeO₃ using yarosite extraction based ethanol gas sensors performance fabricated by coprecipitation method(Universiti Malaysia Perlis (UniMAP), 2019-04)Nowadays, semiconductor is one of the most important materials in the application of science and technology, especially gas sensor. In this present work, characterization of undoped and doped 10 mol% SrO on LaFeO₃ based ethanol gas sensors has been conducted using LaCl₃.7H₂O, Fe₂O₃ from yarosite extraction, and SrCl₂.6H₂O. The used materials were prepared through coprecipitation method. The ethanol gas sensors were made in the form of the thick film using screen printing techniques and fired at 600°C for 2 hours. Characterization of crystal and morphology structures was carried out using X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. Electrical properties of ethanol gas sensors were examined using a gas chamber. The XRD analysis indicated that thick films had a cubic crystal structure. The SEM analysis showed that doped 10 mol% SrO decreased the grain size of LaFeO₃ from 31.29 nm to 29.56 nm. The analysis of electrical properties showed that the thick film doped by 10 mol% SrO has a higher response compared to undoped SrO. The operating temperature of thick films doped by 10 mol% SrO is 295°C-300°C, this value is lower than the undoped SrO operating temperature, it’s 345oC – 355oC. Electrical properties indicated that thick film doped by 10 mol% SrO is the best sensor. These results show that yarosite extraction can be used as the main material in gas sensor fabrication.
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PublicationEffect of Iron (111) Oxide (Fe₂O₃) as an additive and substitution of quartz with POFA on physico-mechanical properties of porcelain(Universiti Malaysia Perlis (UniMAP), 2019-04)Porcelain tile is a translucent ceramic material developed from the mixture of clay, feldspar and quartz. Its excellent functional and technical properties such as low water absorption, low porosity, stain resistance; high bending and compressive strength make it indispensable for industrial activities. This research aimed to determine the effect of the addition of iron (111) oxide (Fe₂O₃) on physicomechanical properties of porcelain. Quartz was substituted with treated Palm Oil Fuel Ash (POFA) at 15wt% and mixed homogeneously with porcelain compositions using ball mill machine for 12 hours at a speed of 250 rev/sec and dry pressed at a moulding pressure of 91 MPa and sintered at 1150°C for 2 hours soaking time. Iron (111) oxide (Fe₂O₃) was added at 1, 2, 3, 4, 10 and 15wt% to the compositions of porcelain, dry pressed and sintered at the same temperature. The maximum value of compressive strength, bulk density and Vickers hardness were achieved by adding Fe₂O₃ at 5wt% as 138.94 MPa, 2.515 g/m³ and 829 HV respectively. It is revealed that the addition of Fe₂O₃ at 5wt% enhanced both physical and mechanical properties of porcelain.