A5055020296- 2D Materials and Applications
- Heavy metals in environment
- MXene and MAX Phase Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Memory and Neural Computing
- Nanowire Synthesis and Applications
- Air Quality and Health Impacts
- Research studies in Vietnam
- Graphene research and applications
- Perovskite Materials and Applications
- Effects and risks of endocrine disrupting chemicals
- Microbial bioremediation and biosurfactants
- Neuroscience and Neural Engineering
- Organic Food and Agriculture
- Agricultural Science and Fertilization
- Antibiotics Pharmacokinetics and Efficacy
- Environmental Quality and Pollution
- Carbon Dioxide Capture Technologies
- Heavy Metals in Plants
- Advanced battery technologies research
- Recycling and utilization of industrial and municipal waste in materials production
- Plant Micronutrient Interactions and Effects
- Extraction and Separation Processes
- Geochemistry and Elemental Analysis
- Composting and Vermicomposting Techniques
Sungkyunkwan University
2020-2024
Vietnam Academy of Science and Technology
2017-2024
Soongsil University
2024
Institute for Basic Science
2021-2022
Suwon Research Institute
2021
Institute for Tropical Technology
2018
University of Newcastle Australia
2018
Southern University at New Orleans
2013
van der Waals heterostructures (vdWHs) of metallic (m-) and semiconducting (s-) transition-metal dichalcogenides (TMDs) exhibit an ideal metal/semiconductor (M/S) contact in a field-effect transistor. However, the current two-step chemical vapor deposition process, synthesis m-TMD on pregrown s-TMD contaminates (vdW) interface hinders doping s-TMD. Here, NbSe2/Nb-doped-WSe2 metal-doped-semiconductor (M/d-S) vdWHs are created via one-step approach using niobium molar ratio-controlled...
In this study, selective Nb doping (P-type) at the WS2 layer in a WS2-MoS2 lateral heterostructure via chemical vapor deposition (CVD) method using solution-phase precursor containing W, Mo, and atoms is proposed. The different activity reactivity (MoO3 > WO3 Nb2O5) enable separation of growth temperature intrinsic MoS2 to 700 °C (first grown inner layer) Nb-doped 800 (second outer layer). By controlling Nb/(W+Nb) molar ratio solution precursor, hole carrier density p-type selectively...
Forming heterostructures of 2D metals and semiconductors using chemical vapor deposition (CVD) has significant potential to effectively reduce contact resistance in electronic devices. However, semiconducting transition metal dichalcogenide (TMD) layers metal–semiconductor are currently restricted monolayers despite the superior mobility density states bilayer TMDs. Herein, NbSe 2 /bilayer Nb‐doped WSe metal/semiconductor heterostructure from exfoliated flakes synthesized first. The bulk...
Abstract The synthesis of semiconductor–metal (S–M) heterostructures comprising semiconducting (S)‐transition metal dichalcogenides (TMDs) and metallic (M)‐TMDs via chemical vapor deposition (CVD) has emerged as a highly promising avenue for achieving low contact resistance in TMD‐based devices. However, CVD‐grown S–M are mainly focused on non‐degenerate semiconductors, despite degenerate semiconductors also being essential semiconductor technology, such negative differential (NDR) device....
This study was conducted to determine the soil contamination and accumulation of arsenic (As) heavy metals including chromium (Cr), copper (Cu), zinc (Zn), cadmium (Cd), lead (Pb) in 15 native cultivated plant species a Pb recycling area Dong Mai village, Hung Yen Province, Vietnam. The analysis 32 samples collected from seven different sites revealed that contents Al, Fe, As, Cr, Cu, Zn, Cd, soils ranged 6200–32,600, 11,300–55,500, 5.4–26.8, 24.9–290, 66.0–252, 143–455, 0.71–1.67,...
As the tight contact interface of lateral PN junction enables high responsivity, specific detectivity, and fast response speed, atomic-scale two-dimensional (2D) heterostructures are emerging as viable alternatives to silicon-based photodiodes.
Introduction: Polycyclic aromatic hydrocarbons (PAHs) are prevalent organic pollutants that garner attention due to their toxicity and carcinogenic properties. These hydrophobic compounds tend accumulate in the components of sediments, posing significant ecological risks. Methods: This study synthesizes analytical methodologies assesses contamination status PAHs Vietnamese sediments through a review previous studies complemented by recent findings from our research group. Various extraction...
Two-dimensional (2D) van der Waals (vdW) layered transition metal dichalcogenides (TMDs) materials have been receiving a huge interest due to atomically thin thickness, excellent optoelectronic properties, and free dangling bonds. Especially the metallic TMDs, such as MoTe2 (1T’ phase), NbS2, or NbSe2, shown fascinating physical properties through various applications, superconductor charge density wave. However, carrier transport of TMDs would be degraded poor stability in ambient...
Silica/Polypyrrole nanocomposites (SiO 2 /PPy) incorporating oxalate as counter anion /PPyOx) were chemically polymerized in the solution with presence of pyrrole, silica, and sodium oxalate. Nanocomposites SiO /PPyOx at different concentrations characterized FTIR, XRD, EDX, TGA, TEM. The corrosion protective properties for carbon steel epoxy coating studied by electrochemical techniques including impedance spectroscopy (EIS) open circuit potential (OCP). FTIR results show a slightly...
This study investigated the airborne concentration of PM10 and 20 trace elements (Al, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, Ti, V, Zn) in residential, industry, traffic road, coal mining, thermal power plant area Bac Giang province. The average was highest at site, followed by 1 sites, industrial sites 2 residential lowest site located mountain area. While Al, Na were most abundant all sampling accounting for 73–96% total obtained elements, Zn occupied from 2.9 to 23.2%....
Mục tiêu: Đánh giá kết quả sớm điều trị phẫu thuật nội soi lối sau qua đường liên bản sống lấy thoát vị đĩa đệm cột thắt lưng tại khoa Phẫu thần kinh Bệnh viện Đa tỉnh Thái Bình với 26 bệnh nhân bị đơn thuần được mổ vị. Đối tượng và phương pháp: chẩn đoán lưng, bằng kiên sống. Nghiên cứu mô tả lâm sàng tiến cứu. Kết quả: Tuổi: cao nhất là 62t, thấp là: 37t. Thời gian trung bình 89,22 ± 15,27 phút. VAS chân trước 6,03 1,17 còn 1.10 0.29, rối loạn cảm giác cải thiện tốt ngay mổ. nằm 2.2 1.09...
<title>Abstract</title> Vertical field effect transistors (VFETs) using graphene and transition metal dichalcogenides (TMDs) heterostructures are promising for downsizing the channel length to a monolayer TMD thickness of 0.65 nm. However, graphene/monolayer TMD/metal VFETs struggle with low on/off ratio due gate screening by layer high off-state tunneling current caused large contact area. Here, we propose nm VFET very made cross-stacking top bottom carbon nanotubes (CNTs) in between. The...
The newly planned lead recycling zone in Dong Mai village has been operating with primary treatment systems using lime to neutralize acid wastewater is a good sign for the local environment, yet real problem that needs further attention and proper solutions accumulation of heavy metals typically (Pb) cadmium (Cd) agricultural land near old Pb area. In this context, 27 soil samples were collected analyzed by AAS method assess situation quality soil. results showed levels Cd still acceptable...
The overuse of antibiotics is losing its effectiveness due to increased antibiotic resistance in bacteria. Over the last two decades, evaluation residues environment has greatly attracted attention researchers around world. more new groups were validated use medical treatment, discharged into environment. In this work, a combined SPE-UPLC-MS/MS method was developed and for simultaneously analyzing 9 compounds belonging 3 different which are tetracyclines (tetracycline – TET,...
In order to understand heavy metal content in commercial ocean fish from Quang Ninh coast and the risk for human consumption, of 8 metals (As, Cd, Co, Cr, Mn, Cu, Zn Pb) found muscles 4 species Ha Long Tien Yen is studied. The results study indicate that accumulations tissues are different may depend on their habitats food items. also show levels four within permissible limits set by Ministry Health safe consumption. However, high level total arsenic suggests further study.
Polygonum hydropiper L. was cultivated on alluvial soil (Pb = 2.6 mg/kg, dry weight) and Pb contaminated 1,380 mg/kg without with amendment of 2 g organic fertilizer/kg 2.5; 5.0; 10.0 NPK fertilizer/1kg soil. After 45 days cultivation, the growth in height biomass P. fertilizer lower than that soil, but content above-ground part higher. In formula 4, weight), when amending microbiological + 5 per 1 kg (with total nutrients amended were: N 0.25, P2O5= 0.52, K2O 0.15, matter 0.21 g/kg soil),...