VNU Journal of Science: Mathematics - Physics
2588-1124
Cơ quản chủ quản: N/A
Phân tích ảnh hưởng
Các bài báo tiêu biểu
Synthesis of Strontium Substituted Hydroxyapatite Coating on Titanium Via Hydrothermal Method
- Trang - 2024
In this study, strontium substituted hydroxyapatite (SrHA) was successfully deposited onto etched titanium substrates in H2SO4 and HCl solution. The deposition was achieved by hydrothermal method by immersing the substrates in a solution containing Ca(NO3)2.4H2O, NH4H2PO4, and 5% Sr(NO3)2, followed by heating at 200°C for 12 hours. X-ray diffraction (XRD) analysis confirmed that all SrHA coatings ......
Optical, Photocatalytic and Magnetic Properties of ZnO Nanostructures Prepared by Thermal Decomposition
Tập 41 Số 1 - Trang - 2025
ZnO nanostructures have been fabricated by annealing zinc acetate dihydrate at different temperatures (Tan). Thermogravimetric analysis, and XRD and Raman studies indicate ZnO crystals formed at above 250 oC. An increase of Tan would enhance the XRD intensity and number of Raman modes characteristic of hexagonal ZnO. Below 700 oC, the samples are mainly nanorods with the diameters and lengths of 5......
Tunable Localized Surface Plasmon Resonance of Gold Nanorod by Control of Sodium Oleate
- Trang - 2024
Gold nanorods (AuNRs) are powerful plasmonic nanomaterials with tunable localized surface plasmon resonance (LSPR) that make them ideal for surface-enhanced Raman scattering (SERS) sensing. In this study, we report a sodium oleate (NaOL)-assisted seed-mediated synthesis of AuNRs in a CTAB-based system. Varying NaOL amount allowed to control the nanorod aspect ratio, improve monodispersity. The res......
Design and Implementation of an S-band Receiver for Small Satellite Based on the Manufactured Subsystems
Tập 40 Số 3 - Trang - 2024
In this work the design and implementaion of a receiver for small satellites in range of 1.9 GHz to 3.0 GHz frequency were presented. We concentrated on developing a new architecture for receiving satellites in challenging environments and integrated some of the author’s previously published designs. By using the protected mechanism for RF circuit of receiver, a mutil-stage in IF amplifier and aut......
Effects of ion irradiations on crystal structure and superconducting properties of MgB2 films
- Trang - 2024
In this study, variations in the crystal structure and improvements in the superconducting properties of MgB₂ films were investigated. The almost pure crystal MgB₂ films, about 800 nm thick, were successfully created using the hybrid physical vapor deposition (HPCVD) method. The irradiations of Nb and Ni ions were carried out by using the accelerator. The irradiated conditions were set up to have ......
e-Idempotent Matrices over Commutative Semirings
Tập 41 Số 2 - Trang - 2025
In this work, we introduce the notion of -idempotent matrices over a commutative semiring, this is a generalization of the idempotent matrices. We investigate some characteristic properties of -idempotent matrices over general semirings. We provide a formula to calculate the number of -idempotent triangular matrices over finite commutative semirings without zero divisors.
Location of Interface Bose-Einstein Condensate Mixtures in Finite Space Under Neumann Boundary Condition
Tập 40 Số 4 - Trang - 2024
In this work we proposed a simple method to determine the coordinate of interface of two-component Bose-Einstein condensates (BECs) in double parabola approximation (DPA) under Neumann boundary conditions. Based on this idea, the static properties of BECs have been investigated totally in DPA.
Coercivity in Annealed Fe57Pt43 Thin Films
Tập 41 Số 2 - Trang - 2025
Fe57Pt43 thin films have been prepared by RF sputtering. As-deposited films were formed in a disordered face-centered cubic (fcc) phase. Upon annealing, the films transformed into the ordered face-centered tetragonal (fct) L10 phase. The effect of annealing temperature on magnetic properties of the films has been studied. The magnetic coercivity was governed by the degree of atomic order of the or......