https://ejournal.unimap.edu.my/index.php/ijneam <p style="text-align: justify;">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.</p> PENERBIT UNIVERSITI MALAYSIA PERLIS en-US International Journal of Nanoelectronics and Materials (IJNeaM) 1985-5761 https://ejournal.unimap.edu.my/index.php/ijneam/article/view/1977 <p>This study introduces a novel methodology for mitigating mutual coupling in Terahertz (THz) multi-band Ultra-Massive Multiple-Input Multiple-Output (UM-MIMO) systems, specifically focusing on plasmonic nanoantenna arrays. The primary objective is to reduce the interference between Frequency Selective Surface (FSS) decoupling structures and adjacent nanoantenna array elements, which is critical for optimizing THz communication system performance. The research involves the design and characterization of new FSS structures and nanoantenna array geometries, employing advanced materials to enhance mutual coupling reduction. By precisely tuning the array geometry and refining the FSS decoupling structure, the study achieves a significant reduction in mutual coupling, with a frequency offset improvement of 4.7% relative to baseline frequencies. Furthermore, the integration of the optimized nanoantenna array with the FSS structure yields substantial reductions in return loss, with <em>S</em>₁₁ and <em>S</em>₂₂ values reaching approximately -7 dB and -8 dB, respectively. The proposed design also demonstrates a compact and stable configuration, achieving a uniform mutual coupling reduction of approximately -22 dB and FSS decoupling structure. This work provides a robust and efficient solution for enhancing the performance and reliability of multi-band THz UM-MIMO systems.</p> Ammar Mohammad Issa Banat Khairul Najimy Abdul Rani Tijjani Adam Alaa Kamal Yousif Dafhalla Copyright (c) 2025 2025-04-09 2025-04-09 18 2 160 169 https://ejournal.unimap.edu.my/index.php/ijneam/article/view/1998 <p>Nanowires play an important role in various applications, especially in exploring their electronic properties. While their mechanical properties have also demonstrated potential, they have not yet been fully theoretically investigated to determine their specific mechanical properties. The goal of this study is to investigate the mechanical properties of SiO nanowires using density functional theory and a first-principles approach. The mechanical properties along (001), (110), and (111) orientations were examined. The strains of 0.1164 × 10-5, 0.12 × 10-5, and 0.115 × 10-5 for each of the three orientations, with moduli of 149.5 GPa, 75.5 GPa, and 85.1 GPa, were found. The total energies along the same orientations (001), (110), and (111) were found to be -1.33, -1.35, and -1.37 eV, respectively. The corresponding Debye temperatures were 676.14 K, 454.70 K, and 616.26 K. The values of Frantsevich's ratios of 0.38, 0.22, and 0.36 along with Poisson's ratios of 0.33, 0.40, and 0.34 confirmed that the nanowires in all crystal directions are ductile. These results demonstrate that the first-principles approaches utilised in this study to study SiO nanowires' characteristics were able to capture the exact behavior of the nanowire parameters.</p> A. Wesam Al-Mufti Th. S. Dhahi Alaa Kamal Yousif Dafhalla Jawaher Suliman Altamimi Duria Mohammed Ibrahim Zayan Azath Mubarakali Abdulrahman Saad Alqahtani Mohamed Elshaikh Elobaid Tijjani Adam M. N. Afnan Uda M. N. A. Uda Subash Chandra Bose Gopinath U. Hashim Copyright (c) 2025 2025-04-16 2025-04-16 18 2 170 178