Nguyen Ba Duc's research while affiliated with Tan Tao University and other places

Publications (32)

Article
Full-text available
The present article is aimed to investigate the second cumulants, and the thermodynamic quantities are dependent on temperature and pressure in the X-ray absorption fine structure spectrum. The expressions have been build by using the model of the non-harmonic correlation of Einstein and Debye. A simple calculation was used to instead complex probl...
Article
This work develops the anharmonic correlated Debye model to study the temperature-dependent extended X-ray absorption fine structure (EXAFS) Debye-Waller factors (DWFs) of B2-FeAl alloys. We derived the analytical expressions of the EXAFS DWF and Debye frequency as functions of temperature. Numerical calculations were performed for Fe1-yAly alloys...
Article
In this study, we conducted a facile method to fabricate an anti-icing surface on elastomer thin film by combining the PDMS nanostructure with the low surface tension lubricant. PDMS solution was mixed with slippery lubricant Krytox 1506 in a rational concentration and followed by a plasma dry etching process to promote the anti-icing performance i...
Preprint
Full-text available
A new method for estimating Morse potential's effective parameters has developed using the sublimation energy, the compressibility, and the lattice constant in expanded X-ray absorption fine structure spectra. Application the received parameters of Morse potential to calculate the mean square relative displacement, elastic constant, anharmonic effe...
Article
Isotopic effects in Debye-Waller factor and in extended X-ray absorption fine structure (EXAFS) have been studied. The studies are succeeded based on anharmonic correlated Einstein model for isotopes derived for providing analytical expressions of cumulants containing isotopic effects and for application of these cumulants to EXAFS of isotopes. Adv...
Article
Full-text available
In this work, we investigate thermal disorder in intermetallic CuCo alloys by extending the anharmonic correlated Einstein model in extended X-ray absorption fine structure (EXAFS) theory. The expressions of bond-stretching force constants, Einstein frequency and temperature, the atomic mean-square relative displacement characterizing the EXAFS Deb...
Article
Full-text available
Hàm dịch chuyển tương quan trong phổ cấu trúc tinh tế hấp thụ tia X đã được xác định trên cơ sở hệ số Debye-Waller. Mô hình Debye tương quan phi điều hòa và mô hình Debye điều hòa đã được sử dụng để xây dựng các biểu thức giải tích của độ dịch chuyển trung bình bình phương, độ dịch chuyển tương đối trung bình bình phương, và hàm dịch chuyển tương q...
Article
The pressure effects on atomic mean-square relative displacement characterizing the extended X-ray absorption fine structure (EXAFS) Debye–Waller factor of iron metal have been investigated based on the Debye model. The analytical expressions of the Debye frequency and EXAFS Debye–Waller factor have been derived as functions of crystal volume compr...
Article
The ice-phobic and transparent surface based on the distinctive structure of a coating material has been investigated. Moth eye structure fabricated on the quartz substrate was covered with a flat paraffin layer to isolate it in a cold and humid environment. Paraffin wax was chosen as the coating material due to low thermal conductivity, easy coati...
Article
In extended X-ray absorption fine structure (EXAFS) theory, the thermal disorder can be described by means of the moments of atomic displacement so-called EXAFS cumulants. In this work, thermal disorder and anharmonicity of cesium iodide (CsI) have been studied based on the anharmonic correlated Debye model in EXAFS theory. Analytical expressions o...
Article
Full-text available
The extended x-ray absorption fine structure (EXAFS) spectroscopy is one of the powerful techniques for investigating local structures of crystalline as well as amorphous materials. It provides different structural information at various high temperatures due to anharmonicity. This work advances the anharmonic correlated Einstein model in EXAFS to...
Article
The Debye model has been developed to investigate the pressure effects on melting point, Debye frequency and Debye temperature of iron metal. The analytical expressions of these thermodynamic quantities have been derived as functions of crystal volume compressibility. The pressure dependence of them is studied based on the well-established equation...
Article
The pressure effects on melting temperature and shear modulus of the B1 phase of LiF are investigated based on a semi-empirical approach. We derived analytical expressions of these quantities as functions of pressure. Numerical calculations are performed for LiF up to pressure of 100 GPa. Our work reveals that the melting curve derived from the Sim...
Article
Full-text available
This work advances the anharmonic correlated Einstein model to investigate how pressure and temperature affect the Debye–Waller factor and thermodynamic parameters of an intermetallic alloy. By using the anharmonic correlated Einstein model in extended X-ray absorption fine structure (EXAFS) theory, analytical expressions are derived for the effect...
Article
The pressure effects on thermo-mechanical properties of B2-type FeAl compound have been investigated based on the moment method in statistical mechanics. We derive analytical expressions of equation-of-state, isothermal bulk modulus and specific heats at constant volume and constant pressure of B2-type iron aluminide intermetallic compound. Numeric...
Article
This paper presents the advances in EXAFS studies of the thermodynamic properties and anharmonic effects based on Debye-Waller factors presented in terms of cumulant expansion. The advances are succeeded based on the generalized anharmonic correlated Einstein model (GACEM) derived for all material structures including complex systems and separated...
Article
The structural and thermomechanical properties of zincblende ZnX (X = S, Se, Te) compounds have been investigated based on the moment method in statistical mechanics. Expressions for the lattice constant, atomic mean-square displacement (MSD), and elastic moduli (Young’s modulus, bulk modulus, and shear modulus) of the zincblende compounds were der...
Article
The anharmonic correlated Debye model has been developed to investigate the thermal disorder in B2-type FeAl intermetallic alloy. We derive analytical expressions of the bond-stretching force constants, the Debye temperature and frequency, the atomic mean-square displacement and the first three extended X-ray absorption fine structure (EXAFS) cumul...
Conference Paper
Effects of the doping ratio and temperature on the Debye-Waller factor (DWF) of metals was investigated using the extended X-ray absorption fine structure spectra. The numerical results agree reasonably with experiments and other theories.
Article
The pressure effects on atomic mean-square displacement, extended X-ray absorption fine structure (EXAFS) Debye-Waller factor and melting temperature of solid krypton have been investigated in within the statistical moment method scheme in quantum statistical mechanics. By assuming the interaction between atoms can be described by Buckingham potent...
Article
The thermodynamic properties and anharmonic perturbation factor of orderly doped crystals are described in terms of the cumulants in extended X-ray absorption fine structure (EXAFS) spectra. The thermodynamic parameters and cumulants are studied based on the anharmonic correlated Einstein model. We derive analytical expressions for the dispersion r...
Article
Full-text available
Thermodynamic properties and anharmonic effects in X-ray absorption fine structure (XAFS) have been studied based on the anharmonic correlated Debye model Debye–Waller factors presented in terms of cumulant expansion. The derived analytical expressions of three first XAFS cumulants involve more information on phonon-phonon interactions taken from i...
Article
We discuss the electromagnetically induced transparency (EIT) phenomenon for a model in which a structured continuum is described by a so-called double Fano structure; instead of one autoionizing (AI) state, two such states are embedded in a flat continuum. Such a Fano structure is the upper level of a Λ-like three-level system and is coupled to tw...
Article
The anharmonic contributions and pressure effects on extended X-ray absorption fine structure (EXAFS) Debye-Waller factor of platinum metal have been investigated up to 900 K and 14 GPa within the anharmonic correlated Debye model. Parameters of interatomic potential have been derived under the second-moment approximation of tight binding scheme. O...
Article
Theoretical and experimental Debye-Waller factors presented in terms of cumulant expansion and thermal expansion coefficient in X-ray absorption fine structure (XAFS) of hcp crystals have been studied. The advances in these studies are shown by a derived method using that the calculations and measurements are necessary only for the second cumulants...
Article
Full-text available
Thermodynamic properties, anharmonic effects and structural determination of fcc crystals have been studied based on the theoretical and experimental Debye–Waller factors presented in terms of cumulant expansion up to the third order, thermal expansion coefficient, X-ray absorption fine structure (XAFS) spectra and their Fourier transform magnitude...
Article
The anharmonic effects of gold in extended X-ray absorption fine structure (EXAFS) have been investigated through the consideration of the first four EXAFS cumulants up to temperature 800 K within the anharmonic correlated Debye model. The interatomic potential between two intermediate atoms has been described by the second-moment approximation to...
Article
Debye-Waller factors presented in terms of cumulant expansion up to the third order, thermal expansion coefficient, X-ray absorption fine structure (XAFS) spectra and their Fourier transform magnitudes of Zn (hcp crystal) have been calculated and measured. The results have been obtained based on the quantum statistically derived method using that t...
Article
Full-text available
Thermodynamic properties of semiconductor compounds have been studied based on Debye-Waller factors (DWFs) described by the mean square displacement (MSD) which has close relation with the mean square relative displacement (MSRD). Their analytical expressions have been derived based on the statistical moment method (SMM) and the empirical many-body...
Article
In this paper, high-order expanded anharmonic effective potential and Debye–Waller factors in X-ray absorption fine structure (XAFS) of hcp crystals have been studied based on classical anharmonic correlated Einstein model. Here XAFS Debye–Waller factors are presented in terms of cumulant expansion up to the fourth order and their analytical expres...
Article
Full-text available
High-order cumulants of fcc crystals in X-ray absorption fine structure (XAFS) have been studied based on anharmonic correlated Debye model and anharmonic effective potential. Analytical expressions for dispersion relation, correlated Debye frequency and temperature, first, second, third and fourth cumulants have been derived which involve more inf...

Citations

... where Κ 0 represents the energy (equilibrium) of the interaction potential, a is the width of well parameter and r 0 is the equilibrium bond distance. The Morse potential has multiple applications in lots of chemical physics subjects, for instance: the discussing of the thermal properties of a specific system such as the diamond class materials and finding the constants of the vibrational force and the elastic properties [10][11][12], the discussing of the correlations in alloys phases [13], the discussing of the spectral analysis [14], in the study of some quantum effects [15,16], discussing the energy vibrational states [17,18], discussing the alpha decay [19], the study of the structures with other potentials [20][21][22], the study of the some dimers where this potential has wide applications [22,23]. In the section-2 of this article, we illustrate the method of deriving of the specific heat equation, and in the section-3, we discussed some aspects of the equation which we derive in addition to the applications of it. ...
... Water penetration in the cooling routine facilitates anchored formed ice to surface textures, which leads to degradation of hydrophobe coating layer and underneath structure as well. Inspired by the insect-catching behaviour of pitcher plant Nepenthes [17,18], slippery lubricant-infused porous surface (SLIP) has been recently named and proposed as the new potential solution for antiicing purposes [19][20][21][22][23][24]. This new approach aims to create an outer low surface tension lubricant layer with enduring performance in high humidity conditions, liquid repellent, and self-healing. ...
... Its structure is an aromatic aliphatic copolyester obtained by polymerisation of terephthalic acid, adipic acid, and 1,4-butanediol. The manufacturing routine of slippery and dual structure thin film was introduced by using a pyramid negative mould and followed by dry reaction ion etching (DRIE) method [9,[25][26][27][28]. Anti-icing properties in terms of ice adhesion and ice repellency were evaluated and compared to as-received aluminium, flat Ecoflex, and single pyramid microstructure surfaces as references. ...
... Considering the difference between Cu and Fe melting points (i.e. T m,Cu = 1085 • C [72] and T m,Fe = 1538 • C [73,74]), these Cu-rich layers would solidify after the Fe-rich ones, causing liquation cracking in isolated locations. In Fe-20Cu, there were much fewer individual Cu particles and the sizes of the Cu clusters increased significantly, raising the time required to produce a chemically uniform liquid since a larger amount of Cu would have to be mixed in a short time upon rapid cooling during LPBF. ...
... From σ 2 (T) and u 2 (T), the correlated function C R (T) to describe the effects of correlation in the vibration of atoms can be deduced. Using the anharmonic correlated Debye model (ACDM), the MSRD σ 2 (T) has the form [19]: ...
... In addition, more refined treatments with a quantum approach do not lead to better results [47,48] . Although many works have been devoted to the study of the relationship between the effective pair potential and crystal potential [49][50][51][52][53] , this problem remains open and is not simple to solve. Comparison between bond thermal expansions Δ 1 * (solid circles) and the contributions due to the asymmetry 3 * /2 2 * (open circles) and to the shift Δ max (triangles) of the effective pair potential for the first six coordination shells of germanium. ...
... This fact can lead to uncertainties in physical information taken from EXAFS. In order to consider the temperaturedependent EXAFS cumulants of crystals, Hung and his collaborators proposed the anharmonic correlated Debye model (ACDM) [5] which has been developed further to study thermal disorder of binary alloys [6]. However, the authors just focused on the specific case of FeAl alloys, Fe0.6Al0.4. ...
... По данным химической реферативной службы (Chemical Abstracts Service) на запрос " Формула Морза" выдаётся более 6000 ссылок. Как пример, приведём случайные выборки работ последнего времени в области спектроскопии [2][3][4][5][6][7][8][9][10][11][12][13], влияния внешнего поля, лазерной диссоциации молекул [14][15][16][17][18][19][20][21][22][23][24], термодинамики, кинетики [25][26][27][28][29][30][31][32][33][34], физики твёрдого тела и жидкости [35][36][37][38][39][40][41][42][43][44], межмолекулярных взаимодействий [45][46][47][48][49][50][51][52][53][54][55][56], свойств потенциала Морза [57][58][59][60][61][62][63][64][65] и т. д. [66][67][68][69][70][71][72][73][74][75][76][77][78][79][80][81]. В публикациях авторы высоко оценивают полезность этого потенциала [2,4,10,50,62,63,64,66], важность часто подчёркивается его упоминанием в заголовках статей. ...
... Several studies in quantum mechanics, solid state physics, condensed matter physics, nuclear physics, chemical physics, molecular physics and other related areas have proofed to an outstanding degree that potential models are very important models for stimulating atomic and molecular interaction since it is capable of predicting and describing the some behavior of atoms and molecules. It also provides an insight into the understanding of molecular spectra, vibrations and dynamics [1], [2], spin orbit interaction, relativistic corrections and diamagnetic susceptibility [3], [4], optical properties [5], [6], interband light absorption and interband optical transitions [7], [8], energy and relativistic effects in weakly bound nuclei [9], [10], [11], external magnetic field and/or Aharonov-Bohm flux fields [12], [13], [14], [15], [16], [17], interactions between magnetic and electric fields [18], thermal and/or thermodynamic properties [19], [20], [21], [22], [23], spin and pseudospin symmetries [24], two body effects [25], [26], [27], [28] among others. ...
... Recently, continuum structures such as the Fano profiles have been used extensively in a variety of fields, including atoms and molecules, nano-plasmonics, femtosecond and attosecond physics, and analogues of it in classical optics [38]. Various advances have been made in exploring and using Fano profiles of autoionization and LICS in atoms and molecules [39][40][41][42][43][44][45][46]. Notable examples include Rydberg states [39], effects of particle statistics [43], and double continua [44], to mention just a few. ...