Doping

This study finds the dependences of the thermal expansion coefficient and heat capacities on temperature and dopant concentration. Our results are compared with experimental data.

6p viuzumaki 28-03-2025 2 0   Download

The first principle calculation was employed to investigate the formation energies and structural, electronic, and magnetic properties of intrinsic and Ni-doped sodium bismuth titanate Bi0.5Na0.5TiO3(BNT). The obtained formation energies indicate that Ni atoms prefer to dope into Bi-sites in the lattice of BNT while the calculated band structure shows that the doping leads to the emergence of new midgap energy states in the bandgaps, reducing the bandgap value of doped materials.

10p viaburame 14-03-2025 3 1   Download

In this study, we synthesized YPO4:x%Tb3+ using the combustion synthesis method and investigated the effects of annealing temperature and dopant concentration on the structural, morphological, and optical properties of the material.

8p viaburame 14-03-2025 2 0   Download

Thin films of ZnO and Al-doped ZnO are deposited on glass wafer substrates using a compressed sprayer system with Zn(CH3COO)2.2H2O and AlCl3 as precursors. The influence of Al doping concentration on the crystal phase and morphology of the samples is investigated by XRD and SEM, respectively.

9p viaburame 14-03-2025 3 1   Download

This study aims to contribute to the development of a GaN/Ga2O3 diode that can be utilized in high-power device applications. The simulated device is calibrated against experimental GaN and Ga2O3 diodes, considering the effect of thickness of GaN layer and its doping concentration on the performance of GaN/Ga2O3 diodes. The band structures of devices are investigated to revial which factors that affect the properties of GaN/Ga2O3 diode.

6p viling 11-10-2024 6 1   Download

In this study, spinel ferrite nanoparticles CoFe2-xLaxO4 (x = 0, 0.025, and 0.05) were successfully synthesized via a simple co-precipitation method using a 5% NaOH solution as a precipitating agent. The physicochemical properties of the materials, annealed at 850 °C for one hour, were characterized using powder X-ray diffraction (PXRD), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and vibrating-sample magnetometry (VSM) at room temperature.

10p viling 11-10-2024 3 1   Download

Thông tư số 01/2024/TT-BVHTTDL quy định về phòng, chống doping trong hoạt động thể thao. Thông tư này áp dụng đối với các tổ chức, cá nhân tham gia hoạt động thể thao, các tổ chức, cá nhân khác có liên quan đến thể thao tại Việt Nam; tổ chức, cá nhân Việt Nam tham gia hoạt động thể thao tại nước ngoài.

9p zizaybay1105 21-06-2024 6 2   Download

The focus of this study is to investigate its optical and conductive properties under different conditions of doping environments, temperature and polymerization conditions. Optical characterization technique such as UV-Visible spectroscopy is developed to carry out the investigation. The developed nanofibers have been demonstrated to possess optical and conductive properties to be dependent on doping variables. Study of these optical properties could prove very useful in the development of electrochromic devices and gas sensors.

103p runthenight07 01-03-2023 13 3   Download

The thesis is performed theoretically and experimentally. The theoretical studies on the dynamics of the single short pulse emission using transient cavity method and narrow linewidth and tunable wavelength generation using Littrow grating configuration were performed. On the other hand, the experimental investigations were carried out Experimental research was carried out based on the optimal results obtained by the theoretical studies.

27p beloveinhouse01 15-08-2021 36 4   Download

Mục tiêu của Luận án là chế tạo vật liệu nano tổ hợp trên nền TiO2 có cấu trúc nano sợi, được chế tạo bằng phương pháp phun tĩnh điện, dùng làm điện cực quang trong mô hình PEC. Điện cực có độ bền hóa học cao, đồng đều, đặc tính bề mặt tốt, có độ bám dính tốt trên đế điện cực ITO (Tin-doped indium oxide) và cho hiệu suất quang tách nước cao trong vùng ánh sáng khả kiến. Mời các bạn cùng tham khảo!

136p armyofthedead 23-06-2021 53 8   Download

The objectives of the thesis: Research, fabricate Er3+-doped silica glass microspheres with different sizes by arc discharge method; building an experimental system to investigate WGM mode laser emission spectrum in the optical communication wavelength region ~ 1550 nm of some fabricated microspheres.

28p extraenglish 24-05-2021 18 4   Download

Mục đích nghiên cứu của Luận án này nhằm đóng góp cho việc tổng hợp các vật liệu xúc tác tiên tiến mới có thể thay thế xúc tác truyền thống trong pin nhiên liệu hoạt động ở nhiệt độ thấp. Mời các bạn cùng tham khảo!

26p extraenglish 26-05-2021 16 3   Download

The objectives of the thesis: Research, fabricate Er3+-doped silica glass microspheres with different sizes by arc discharge method; building an experimental system to investigate WGM mode laser emission spectrum in the optical communication wavelength region ~ 1550 nm of some fabricated microspheres.

28p capheviahe27 23-02-2021 24 3   Download

The thesis focused on the synthesis of Mn, Ce, C doped ZnO nanoparticles materials and doped ZnO with multi-layered carbon nanotube nanocomposite materials and assessed their photo-oxidative potentiality through photocatalytic reactions of methylene blue (MB) decomposition in aqueous solution under visible light.

30p capheviahe27 23-02-2021 21 5   Download

This article reports photovoltaic and optical properties of composite films 5,10,15,20-tetraphenylporphyrin (TPP) with the addition of phosphor’s complex oxide (Y0.9Eu0.05Bi0.05VO4) prepared by the spin-coating method on the surface of indium tin oxide (ITO) plates.

8p lucastanguyen 01-06-2020 11 2   Download

The set of intracavity field equations describing the evolution of intra-cavity pumping, Stokes and anti-Stokes powers of Raman laser is presented. Most attention is given to intra-cavity competition of two Raman waves, which depends on cavity properties, frequency shift and phase mismatch. The calculated results are based on Ge-doped and D2-gas-in glass fiber lasers at CW-regime and pulse-pumped regime.

8p 12120609 01-06-2020 14 2   Download

In this study, we investigated the microstructure of such doped fuels as well as a reference standard UO2 by positron annihilation spectroscopy (PAS). Although this technique is particularly sensitive to lattice point defects in materials, a wider application in the UO2 research is still missing.

5p christabelhuynh 30-05-2020 6 1   Download

For this purpose, a simplified thermal-hydraulic analysis was performed in order to evaluate the effects on fuel thermal conductivity of adding erbia to uranium oxide. The results obtained allow to conclude that an Er-doped assembly enriched to >5 wt.% in 235U represents an advantageous solution for very long fuel cycles, and it is so suited for very high burnups.

12p christabelhuynh 30-05-2020 16 3   Download

The objectives of the thesis: The thesis focused on the synthesis of Mn, Ce, C doped ZnO nanoparticles materials and doped ZnO with multi-layered carbon nanotube nanocomposite materials and assessed their photo-oxidative potentiality through photocatalytic reactions of methylene blue (MB) decomposition in aqueous solution under visible light.

30p phongtitriet000 08-08-2019 47 4   Download

The thesis aims to investigate and select suitable conditions for synthesis of Nanocompozit Silica / Polypyrol by In-situ method. Nature and study of corrosion inhibition ability of Silica / Polypyrol carbon steel. Select suitable conditions for synthesis of silica / Polypyrol anionic doped for In-situ method. Corrosion inhibitory ability for Nanocompozit Silica / Polypyrol-Anion Carbon steel for polybutyral coating. Corrosion protection for carbon steel of epoxy coating containing SiO2 / polypyrol-anion composite.

27p xacxuoc4321 09-07-2019 56 4   Download