Thu Dau Mot University Journal of Science


Natural Science

STUDY OF THE STRUCTURAL AND ELECTRONIC PROPERTIES OF SULFUR DOPING STANENE NANORIBBON:  A CASE DFT

STUDY OF THE STRUCTURAL AND ELECTRONIC PROPERTIES OF SULFUR DOPING STANENE NANORIBBON: A CASE DFT

By Nguyen Thanh Tung
The structural and electronic properties of sulfur-doped armchair stanene nanoribbons (ASnNRs) have been investigated using Density Functional Theory (DFT). The diverse structural and electronic characteristics induced by the substitution of sulfur atoms were comprehensively analyzed through first-principles calculations, including formation energy, optimized structural parameters, projected density of states (PDOS), and ...
INFLUENCE OF PRESSURE ON STRUCTURAL PROPERTIES  OF AG: A MOLECULAR DYNAMICS SIMULATION

INFLUENCE OF PRESSURE ON STRUCTURAL PROPERTIES OF AG: A MOLECULAR DYNAMICS SIMULATION

By Mai Van Dung, Truong Duc Quynh
In this study, molecular dynamics simulations were employed to investigate the influence of pressure on the structural properties of silver (Ag) at 300K. The results reveal that an increase in pressure leads to a reduction in nearest-neighbor distance, a promotion of local ordering, and a transition from a largely disordered ...
CONDUCTIVITY OF QUANTUM WELLS:  ROLE OF ELECTRON-ACOUSTIC PHONON INTERACTION

CONDUCTIVITY OF QUANTUM WELLS: ROLE OF ELECTRON-ACOUSTIC PHONON INTERACTION

By Hoang Van Ngoc
Conductivity is a crucial and widely recognized concept in material science, particularly significant in the study of low-dimensional systems. This research extends the analysis of the conductivity tensor within a quantum well with infinite potential, focusing on electron-acoustic phonon scattering. The system is subjected to two external fields: an electromagnetic ...
ENHANCING GRAPHENE IN INGREDIENT  OF PAINTS COATING

ENHANCING GRAPHENE IN INGREDIENT OF PAINTS COATING

By Nguyễn Thị Huỳnh Nga
The excellent flexibility of graphene materials that allows them to adjust to the curvature of the substrate surface, chemical surface inertness, and impermeability have attracted considerable attention in the past decade as a blending material and an additive in anti-corrosion coatings. In this paper, we present the role of graphene ...
ROLE OF RESISTANT STARCH FOR HEALTHY  AND FOOD APPLICATION

ROLE OF RESISTANT STARCH FOR HEALTHY AND FOOD APPLICATION

By Nguyen Thi Bich Tram
Resistant starch (RS) is an insoluble fibre stable under various food processing conditions, including high temperatures and pH levels. RS has many beneficial effects on human health, such as positive effects on digestive tract activity, microflora, blood cholesterol levels, glycemic index, diabetes control, increased satiety and effective weight loss. Recently, ...
GREEN FABRICATION OF GOLD NANOBRANCHES  BY HEPES BUFFER

GREEN FABRICATION OF GOLD NANOBRANCHES BY HEPES BUFFER

By Quang Thi Ngoc Anh, Khuong Quoc Vo
In recent years, asymmetric gold nanoparticles have attracted a lot of attention from researchers owing to their unique properties and varied applications in many fields. In this study, gold nanobranches were prepared using a one-step, green reducing method, with the HEPES buffer acting as both a reducing agent and surfactant. ...
UTILIZATION OF HYDROXYAPATITE/CRAB SHELL CHITOSAN COMPOSITES IN REMOVAL OF AQUEOUS CONGO RED: INFLUENCE FACTORS, ADSORPTION KINETICS AND ISOTHERM

UTILIZATION OF HYDROXYAPATITE/CRAB SHELL CHITOSAN COMPOSITES IN REMOVAL OF AQUEOUS CONGO RED: INFLUENCE FACTORS, ADSORPTION KINETICS AND ISOTHERM

By Nguyen Trung Hieu, Ha Tuan Anh
Due to the limitations of traditional adsorbents for dyeing wastewater, this study combined natural adsorbent (CS, chitosan) and hydroxyapatite (HAp) to form a composite for enhancing the adsorption of aqueous Congo red (CR). The chitosan was prepared from crab shells (Somanniathelphusa sinensis) with a deacetylation degree of about 89%. The ...
EXISTENCE AND UNIQUENESS RESULTS FOR PANTOGRAPH DIFFERENTIAL EQUATIONS CONNECTED  TO RIESZ-CAPUTO FRACTIONAL DERIVATIVE  WITH A WEAKLY SINGULAR SOURCE

EXISTENCE AND UNIQUENESS RESULTS FOR PANTOGRAPH DIFFERENTIAL EQUATIONS CONNECTED TO RIESZ-CAPUTO FRACTIONAL DERIVATIVE WITH A WEAKLY SINGULAR SOURCE

By Nguyen Minh Dien
Fractional differential equations are an important branch of mathematics and have been considered under many different fractional derivatives. Among them, differential equations with Riesz-Caputo fractional derivatives have also attracted the attention of many researchers. Studying differential equations that may have singularity coefficients is more difficult than usual because they require ...
SYNTHESIS OF Mn-Fe BIMETALLIC NANOPARTICLES  AND ITS APPLICATION AS A CATALYST  FOR METHYL ORANGE DEGRADATION

SYNTHESIS OF Mn-Fe BIMETALLIC NANOPARTICLES AND ITS APPLICATION AS A CATALYST FOR METHYL ORANGE DEGRADATION

By Pham Dinh Du
In this paper, Mn-Fe bimetallic nanoparticles were synthesized by simultaneous reduction of a salt mixture of KMnO4 and FeCl3 with glucose as a reducing agent. Degradation of methyl orange in aqueous solution, using hydrogen peroxide as an oxidizing agent, was used to evaluate the catalytic activity of the material. The ...
RESEARCH ON THE PROPERTIES OF THE ARMCHAIR SISN NANORIBBONS APPLIED IN NANOELECTRONICS  AND OPTOELECTRONICS

RESEARCH ON THE PROPERTIES OF THE ARMCHAIR SISN NANORIBBONS APPLIED IN NANOELECTRONICS AND OPTOELECTRONICS

By Tran Minh Tien
The paper presents the results of a study on the essential physical properties of armchair SiSn nanoribbon (SiSnNR) material, based on density functional theory (DFT) using the quantum simulation program VASP. Structural parameters are highlighted along with electronic and optical properties. The findings reveal that SiSnNR exhibits significant differences in ...
A UNIQUENESS CRITERIA FOR ORDINARY FIRST ORDER DIFFERENTIAL EQUATIONS

A UNIQUENESS CRITERIA FOR ORDINARY FIRST ORDER DIFFERENTIAL EQUATIONS

By Ngo Le Hong Phuc
The theory of differential equations arises from the study of physical phenomena. This field has various applications in science and engineering. The study of qualitative properties for each mathematical model plays an important role, attracting the attention of both theoretical and applied researchers. Normally, the most significant qualitative property to ...
IMPROVEMENT IN PHOTOCATALYTIC ACTIVITY NOx USING N-TiO2 PHOTOCATALYTIC MATERIALS UNDER VISIBLE LIGHT

IMPROVEMENT IN PHOTOCATALYTIC ACTIVITY NOx USING N-TiO2 PHOTOCATALYTIC MATERIALS UNDER VISIBLE LIGHT

By Le Thi Pho
Improving and exploring the photocatalytic performance of composites for new models continues to pose a challenge. Here, a straightforward thermal dispersion method is achieved by incorporating nitrogen (N) into TiO2 at different weights (1%, 3%, and 5%) to enhance photocatalytic activity. The material properties are analyzed through ultraviolet-visible diffuse reflectance ...