Nguyen Ngoc Long
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View article: XẾP HẠNG VÀ BẢO ĐẢM CHẤT LƯỢNG GIÁO DỤC ĐẠI HỌC Ở VIỆT NAM HIỆN NAY
XẾP HẠNG VÀ BẢO ĐẢM CHẤT LƯỢNG GIÁO DỤC ĐẠI HỌC Ở VIỆT NAM HIỆN NAY Open
Xếp hạng đại học đã và đang trở thành một hiện tượng thu hút rất nhiều quan tâm của những người quan tâm đến giáo dục đại học ở Việt Nam. Các bảng xếp hạng đang ngày càng phổ biến và tác động lớn đến hoạt động của các cơ sở giáo dục đại họ…
View article: Hydrogen-Driven Engineering of Electronic Properties in Pbs Quantum Dots and Superlattices
Hydrogen-Driven Engineering of Electronic Properties in Pbs Quantum Dots and Superlattices Open
View article: Electron beam and thermal stabilities of MFM-300(M) metal–organic frameworks
Electron beam and thermal stabilities of MFM-300(M) metal–organic frameworks Open
This work reports the thermal and electron beam stabilities of a series of isostructural metal–organic frameworks (MOFs) of type MFM-300(M) (M = Al, Ga, In, Cr).
View article: Catalytic decomposition of NO2 over a copper-decorated metal–organic framework by non-thermal plasma
Catalytic decomposition of NO2 over a copper-decorated metal–organic framework by non-thermal plasma Open
Efficient catalytic conversion of NO2 to non-harmful species remains an important target for research. State-of-the-art deNOx processes are based upon ammonia (NH3)-assisted selective catalytic reduction (NH3-SCR) over Cu-exchanged zeolite…
View article: Bearing capacity of drilled shaft in intermediate geomaterials
Bearing capacity of drilled shaft in intermediate geomaterials Open
Weathered rock or IGMs (Intermediate Geomaterials) is still a controversy in designing the bearing capacity of the drilled shaft. At present, Vietnamese standards separately defined the load capacity of the pile in soils and rocks. That le…
View article: Synthesis and Characterization of Ni2+-doped SnO2 Powders
Synthesis and Characterization of Ni2+-doped SnO2 Powders Open
The SnO2:Ni2+ powders with dopant contents ranging from 0.0 to 12 mol% have been synthesized by sol-gel method. The samples were characterized by X-ray diffraction (XRD) Raman spectroscopy, energy-dispersive X-ray spectrometer (EDS) and ph…
View article: Influence of Mn\(^{2+}\) Doping on Structural Phase Transformation and Optical Property of TiO\(_2\):Mn\(^{2+}\) Nanoparticles
Influence of Mn\(^{2+}\) Doping on Structural Phase Transformation and Optical Property of TiO\(_2\):Mn\(^{2+}\) Nanoparticles Open
Titanium dioxide (TiO2) nanoparticles with various Mn2+-doping concentration (from 0 to 12 mol%) were successfully synthesized by the sol–gel method using titanium tetrachloride (TiCl4), and manganese II chloride tetrahydrate (MnCl2.4H2O) …
View article: Reduced thermal dependence of the sensitivity of a planar Hall sensor
Reduced thermal dependence of the sensitivity of a planar Hall sensor Open
The ability to stabilize the sensitivity of a magnetoresistance sensor in unstable thermal environments is a key parameter in many high precision measurements. Here, we propose a method to stabilize the sensitivity of a highly sensitive an…
View article: Notice of Redundant Publication: The microstructure, high performance magnetic hardness and magnetic after-effect of an <i>α</i>-FeCo/Pr<sub>2</sub>Fe<sub>14</sub>B nanocomposite magnet with low Pr concentration (2009 <i>Nanotechnology</i> 20 165707)
Notice of Redundant Publication: The microstructure, high performance magnetic hardness and magnetic after-effect of an <i>α</i>-FeCo/Pr<sub>2</sub>Fe<sub>14</sub>B nanocomposite magnet with low Pr concentration (2009 <i>Nanotechnology</i> 20 165707) Open
View article: Effect of Storage Conditions on the Long-Term Stability of Bactericidal Effects for Laser Generated Silver Nanoparticles
Effect of Storage Conditions on the Long-Term Stability of Bactericidal Effects for Laser Generated Silver Nanoparticles Open
Silver nanoparticles (AgNPs) are widely used as antibacterial agents, but their antibacterial durability and the influence by storage conditions have not been thoroughly investigated. In this study, AgNPs were produced using a picosecond l…
View article: Minor hysteresis patterns with a rounded/sharpened reversing behavior in ferromagnetic multilayer
Minor hysteresis patterns with a rounded/sharpened reversing behavior in ferromagnetic multilayer Open
Hysteresis of ferromagnetic system exhibits a fundamental stimulus-response behavior, thereby casting all the important macromagnetic system parameters such as coercivity, nucleation field, saturation magnetization, and hysteresis loss. Re…
View article: Exploring characteristics of the corner sections of a domain wall trap nanostructure with the two-field direction method
Exploring characteristics of the corner sections of a domain wall trap nanostructure with the two-field direction method Open
A domain wall trap structure which supports a reproducible wall motion using the two field direction method with variations of the two field orientation angles (±θ).
View article: Field-driven single domain wall motion in ferromagnetic nanowires
Field-driven single domain wall motion in ferromagnetic nanowires Open
A domain wall trap structure was found which is suitable for the field-driven single DW propagation between two narrow nanowires.
View article: SYNTHESIS AND PHOTOLUMINESCENCE STUDIES ON ZINC OXIDE NANOWIRES
SYNTHESIS AND PHOTOLUMINESCENCE STUDIES ON ZINC OXIDE NANOWIRES Open
Semiconductor single crystal ZnO nanowires have been successfully synthesized by a simple method based on thermal evaporation of ZnO powders mixed with graphite. Metallic catalysts, carrying gases, and vacuum conditions are not necessary. …
View article: PHOTOLUMINESCENCE OF ZnO NANOSTRUCTURE PREPARED BY CATALYST - ASSISTED VAPOR - LIQUID - SOLID TECHNIQUE
PHOTOLUMINESCENCE OF ZnO NANOSTRUCTURE PREPARED BY CATALYST - ASSISTED VAPOR - LIQUID - SOLID TECHNIQUE Open
ZnO semiconductor nanostructures have been synthesized by thermal evaporation of mixture of ZnO and graphite powders. The thin layer of gold coated on Si substrates was used as a catalyst. The structure analysis shows high crystallinity of…
View article: In Situ TEM Studies of Nanostructured Thermoelectric Materials: An Application to Mg‐Doped Zn<sub>4</sub>Sb<sub>3</sub> Alloy
In Situ TEM Studies of Nanostructured Thermoelectric Materials: An Application to Mg‐Doped Zn<sub>4</sub>Sb<sub>3</sub> Alloy Open
We demonstrate an advanced approach using state of the art in situ transmission electron microscopy (TEM) to understand the interplay between nanostructures and thermoelectric (TE) properties of high‐performance Mg‐doped Zn 4 Sb 3 TE syste…
View article: The effect of edge-roughness of magnetic nanowires on the degree of asymmetry in transverse domain walls
The effect of edge-roughness of magnetic nanowires on the degree of asymmetry in transverse domain walls Open
The effect of edge roughness of permalloy nanowires can be quantified through the measurement of asymmetry in transverse domain walls.
View article: <i>In situ</i> transmission electron microscopy for magnetic nanostructures
<i>In situ</i> transmission electron microscopy for magnetic nanostructures Open
Nanomagnetism is a subject of great interest because of both application and fundamental aspects in which understanding of the physical and electromagnetic structure of magnetic nanostructures is essential to explore the magnetic propertie…
View article: Synthesis and Characterization of Ni2+-doped TiO2 Nanowires
Synthesis and Characterization of Ni2+-doped TiO2 Nanowires Open
TiO2 nanowires doped with different amounts of Ni2+ ions (from 0 to 18 mol%) were synthesized by hydrothermal technique. The samples were characterized by X-ray diffraction (XRD) and Raman spectroscopy, field emission scanning electron mic…
View article: A TEM study of morphological and structural degradation phenomena in LiFePO<sub>4</sub>-CB cathodes
A TEM study of morphological and structural degradation phenomena in LiFePO<sub>4</sub>-CB cathodes Open
LiFePO4-based cathodes suffer from various degradation mechanisms which influences the battery performance. In this paper morphological and structural degradation phenomena in laboratory cathodes made of LiFePO4 (LFP) mixed with carbon bla…
View article: Hydrothermal Synthesis and Optical Properties of Undoped and \(\text{Eu}^{3+}\)-doped Zinc Stannate Nanocrystals
Hydrothermal Synthesis and Optical Properties of Undoped and \(\text{Eu}^{3+}\)-doped Zinc Stannate Nanocrystals Open
In this work we report a hydrothermal approach for synthesis of zinc stannate (Zn2SnO4)nanocrystals. Our research focused on the effect of the molar ratio of initial chemicals, reaction temperature and reaction duration on the phase compos…
View article: Low-Voltage FIB/SEM Tomography for 3D Microstructure Evolution of LiFePO<sub>4</sub>/C Electrode
Low-Voltage FIB/SEM Tomography for 3D Microstructure Evolution of LiFePO<sub>4</sub>/C Electrode Open
This work presents an investigation of the degradation mechanisms that occur in LiFePO 4 /C battery electrodes during charge/discharge cycling. Impedance spectra were measured on a fresh electrode and an electrode aged by cycling. The spec…
View article: Tunable exchange bias effect in magnetic Bi$_{0.9}$Gd$_{0.1}$Fe$_{0.9}$Ti$_{0.1}$O$_3$ nanoparticles at temperatures up to 250 K
Tunable exchange bias effect in magnetic Bi$_{0.9}$Gd$_{0.1}$Fe$_{0.9}$Ti$_{0.1}$O$_3$ nanoparticles at temperatures up to 250 K Open
The exchange bias (EB) effect has been observed in magnetic Bi$_{0.9}$Gd$_{0.1}$Fe$_{0.9}$Ti$_{0.1}$O$_3$ nanoparticles. The influence of magnetic field cooling on the exchange bias effect has also been investigated. The magnitude of the e…
View article: Effect of Cr\(^{3+}\) Concentration and Heat-treating Temperature on Structural Property of Cr\(^{3+}\)- doped TiO\(_2\) Nanowires Synthesized by Hydrothermal Method
Effect of Cr\(^{3+}\) Concentration and Heat-treating Temperature on Structural Property of Cr\(^{3+}\)- doped TiO\(_2\) Nanowires Synthesized by Hydrothermal Method Open
Anatase Ti1-xCrxO2 nanowires with Cr3+ dopant contents ranging from x = 0 to 0.1 have been successfully synthesized by hydrothermal method. The nanowires were prepared from anatase titanium dioxide powder (TiO2), chrome nitrate (Cr(NO3)3),…
View article: Analysis of the Interphase on Carbon Black Formed in High Voltage Batteries
Analysis of the Interphase on Carbon Black Formed in High Voltage Batteries Open
Carbon black (CB) additives commonly used to increase the electrical conductivity of electrodes in Li-ion batteries are generally believed to be electrochemically inert additives in cathodes. Decomposition of electrolyte in the surface reg…
View article: Synthesis and Optical Characterization of Samarium Doped Lanthanum Orthophosphate Nanowires
Synthesis and Optical Characterization of Samarium Doped Lanthanum Orthophosphate Nanowires Open
LaPO4 nanowires doped with 0, 1, 2, 3, 4 and 5 mol% Sm3+ were prepared by co-precipitation technique. These nanowires were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), photoluminescence (PL), photoluminescenc…