A5072673139- Graphene research and applications
- Machine Learning in Materials Science
- Fuel Cells and Related Materials
- Nanopore and Nanochannel Transport Studies
- Quantum and electron transport phenomena
- Computational Drug Discovery Methods
- Advancements in Battery Materials
- Enzyme Production and Characterization
- Magnetic and transport properties of perovskites and related materials
- Protein Structure and Dynamics
- Essential Oils and Antimicrobial Activity
- X-ray Diffraction in Crystallography
- Advanced Battery Technologies Research
- Semiconductor materials and devices
- Advanced Battery Materials and Technologies
- Biofuel production and bioconversion
- Advanced Physical and Chemical Molecular Interactions
- Advanced Condensed Matter Physics
- Muon and positron interactions and applications
- Advanced Thermoelectric Materials and Devices
- Thermal Expansion and Ionic Conductivity
- Speech and Audio Processing
- Studies on Chitinases and Chitosanases
- Transgenic Plants and Applications
- Sugarcane Cultivation and Processing
Vietnam Posts and Telecommunications Group (Vietnam)
2025
Hanoi University of Science and Technology
2017-2024
VNU University of Science
2009-2024
Vietnam Academy of Science and Technology
2021-2023
Taipei Medical University
2022
Vietnam National University, Hanoi
2010-2021
Vinh University
2020-2021
Japan Advanced Institute of Science and Technology
2012
Hanoi University
2012
The study focuses on engineering of recombinant Aspergillus niger to produce highly active xylanase. xylanase G2 encoding gene originating from oryzae VTCC-F187 was cloned, amplified, and inserted into the pAN7.1GluA vector with specific primers possessing BamHI. plasmid introduced VTCC-F017 by chemical methods. strain checked polymerase chain reaction method Southern blot. Next, protein expressed purified His-tag column. molecular mass G2, as determined sodium dodecyl sulphate...
Abstract The subnano free‐volume hole features of Nafion‐212 and poly(styrene sulfonic acid) grafted poly(ethylene‐co‐tetrafluoroethylene) polymer electrolyte membranes are investigated by using the positron annihilation lifetime spectroscopic analyses with three‐ four‐component models (i.e., one‐ two‐ortho‐positronium [ o ‐Ps] components). model provides a more adequate description for both membranes, in which longer ‐Ps is assigned to larger free volume sizes mobile side chains, while...
Abstract Chemical degradation in the presence of H 2 O aqueous solution and water states poly(styrene sulfonic acid) (PSSA) grafted poly(ethylene‐co‐tetrafluoroethylene) polymer electrolyte membranes (ETFE‐PEMs) with grafting degree (GD) 8.8%–21.1% are investigated using Fourier‐transform infrared spectroscopy (FT‐IR), thermogravimetric analysis (TGA), electrochemical impedance (EIS). The ETFE‐PEMs show complete detachment at α‐hydrogen atoms whole graft PSSA chains from ETFE backbones,...
Enterovirus 71 (EV71) is the major etiological agent contributing to development of hand-foot-mouth disease (HFMD). There are not any global available vaccines or antibody drugs against EV71 released yet. In this study, we perform virus immunization in a cost-effective and convenient approach by preparing particles from size exclusion chicken. Polyclonal yolk-immunoglobulin (IgY) was simply purified egg yolk monoclonal single-chain variable fragments (scFv) were selected via phage display...
Graphene is a promising candidate as material used in nano-scale devices because of recent developments advanced experimental techniques. Motivated by successful fabrications U-shaped graphene channel transistors using the gallium focused ion beam technology, we have performed ab-initio calculations to investigate electronic properties and quantum transport nanoribbons. The are calculated numerical atomic orbital basis set framework density functional theory. investigated non-equilibrium...
We present a first-principles study on the interstitial-mediated diffusion process of neutral phosphorus (P) atoms in silicon crystal with presence mono-atomic hydrogen (H). By relaxing initial Si structures containing P atom and an H atom, we derived four low-energy P-H-Si defect complexes whose formation energies are significantly lower than those P-Si complexes. These classified into two groups. In group A, is located near whereas B, close to atom. found that pairs or changes nature...
Chemical composition and antioxidant activity of the essential oil Alseodaphne velutina Chev. (Lauraceae) were investigated for first time from Viet Nam. Leaf was hydrodistilled analysed by GC GC-MS that totally identified 32 terpenoid compounds (accouting 89.18% total oil) with β-patchoulene (25.74%) β-caryophyllene (12.81%) as two major sesquiterpene hydrocarbons compounds. The potential leaf evaluated using DPPH, ABTS FRAP assays, revealed a moderate-to-high comparable already known...
In this contribution the phenomenological theory for tunnelling magnetoresistance phenomenon observed in granular perovskite manganese systems is developed using Landauer ballistic transport concept. It was shown that field dependence, magnitude and derivative of ratio experimentally are well reproduced by presented theory.
This work continues our recent molecular dynamics investigation of the three systems human ACE2 receptor interacting with viral RBDs SARS-CoV virus and two variants SARS-CoV-2 viruses. The simulations are extended analyzed using unsupervised machine learning models to give complementary descriptions hidden features binding mechanism. Specifically, principal component analysis (PCA) variational autoencoder (VAE) employed, both classified as dimensionality reduction approaches different...
Trong nghiên cứu này, chúng tôi đề xuất các mô hình học máy, bao gồm hồi quy tuyến tính, LASSO và Rigde, để ước tính nhanh năng lượng tổng cộng của hệ vật liệu từ. phương pháp tôi, một từ là tương tác hóa Năng được gần đúng như nguyên tử cấu thành, khi với môi trường xung quanh trong bán kính giới hạn xác định. từng phân tách thành số hạng hai biểu diễn dưới dạng tổ hợp hàm cơ sở. cũng thành. Các sau huấn luyện dữ mạng tinh thể bcc-Fe, có dự đoán ở cả trạng thái không tính. Kết quả này đã...
In this paper, I present first-principle calculations which are performed by using combination of DFT and NEGF methods to investigate the adsorption CO2 NH3 molecules on straight U-shaped GNRs junctions. The density state, molecular orbital, energy, transmission spectrum, current-voltage characteristics were analyzed. It is found show that at dangling bond edges exhibit chemical interaction behavior with high energy. Besides, for ZGRNs without adsorption, states around Fermi level...
We present machine learning models for fast estimating atomic forces. In our method, the total energy of a system is approximated as summation which interaction with its surrounding chemical environment within certain cutoff radius. Atomic decomposed into two-body terms are expressed linear combination basis functions. For force exerted on an atom, we employ set functions representing pairwise force. use least-square regression regularized by l2-norm, known Ridge regression, to estimate...
In this paper we first present a new fabrication process of downscaled graphene nanodevices based on direct milling using an atomic-size helium ion beam. We address the issue contamination caused by electron-beam lithography to pattern contact metals prior ultrafine in microscope (HIM). then our recent experimental study effects exposure carrier transport properties. By varying time bombardment onto bilayer nanoribbon transistor, change transfer characteristics is investigated along with...
The electronic and transport properties of hybrid armchair–zigzag nanostructures, which include right-angles-shaped GNRs, U-shaped patterned nanopores structured GRNs, were studied by the combination density functional theory nonequilibrium Green’s function method. state, electron transmission spectra, molecular orbitals analyzed. obtained results show that GNRs junctions tend to open a gap when numbers right-angles are greater than or equal 4. increases insignificantly as It implies GNR...
Introduction: Proton exchange membrane (or polymer electrolyte membrane) fuel cells (PEMFCs) are attracting enormous research activities because they a new power source for applications in different industrial sectors, such as transportation, stationaries, and portable devices. Nafion is the available commercial material PEMs, but it has high production cost, leading to strong demand alternative membranes. Polystyrene sulfonic acid (PSSA)-grafted poly(ethylene-co-tetrafluoroethylene) (ETFE)...
The reconstruction and electronic structures of the interfaces between single wall carbon nanotubes ferromagnetic Co electrodes were studied in framework density functional theory. obtained results revealed that there is a strong interaction electrodes. At interface region, Top layers surface have been significantly reconstructed. nature chemical bonds at Co-C covalent bonding. increase electron occurs mainly where substantial concentration accumulates bonds. A small amount charge transfer...