A5100436534- Material Dynamics and Properties
- Glass properties and applications
- Thermodynamic properties of mixtures
- Metallic Glasses and Amorphous Alloys
- Phase-change materials and chalcogenides
- Liquid Crystal Research Advancements
- Chemical Thermodynamics and Molecular Structure
- Theoretical and Computational Physics
- Advanced materials and composites
- Vibration Control and Rheological Fluids
- Boron and Carbon Nanomaterials Research
- Photochemistry and Electron Transfer Studies
- Solid-state spectroscopy and crystallography
- MXene and MAX Phase Materials
- Dielectric materials and actuators
- Phase Equilibria and Thermodynamics
- Ionic liquids properties and applications
- Advanced Thermoelectric Materials and Devices
- Seismic Waves and Analysis
- Intermetallics and Advanced Alloy Properties
- Chalcogenide Semiconductor Thin Films
- Supercapacitor Materials and Fabrication
- Metal and Thin Film Mechanics
- Seismic Imaging and Inversion Techniques
- Spectroscopy and Quantum Chemical Studies
Tianjin University of Commerce
2025
Zhejiang Normal University
2024-2025
Yanshan University
2015-2024
State Key Laboratory of Metastable Materials Science and Technology
2011-2024
Nanjing University of Aeronautics and Astronautics
2021-2024
Materials Science & Engineering
2024
Qingdao University of Technology
2024
National University of Defense Technology
2023
China University of Geosciences
2016-2023
University of Chinese Academy of Sciences
2022
Black phosphorous (BP) is a unique layered p‐type semiconducting material. The successful use of BP nanosheets in field‐effect transistors fueled research on atomic layers that focuses on, e.g., the exploration their optical and electronic properties, promising applications (opto)electronics. However, films are prone to degradation ambient conditions, which prevents commercial application. Here, route application as an environmental stable nonvolatile resistive random access memory...
In this paper, the influence of different fiber materials on dynamic splitting mechanical properties concrete was investigated. Brazil disc tests were conducted plain concrete, palm fiber-reinforced and steel specimens using a split Hopkinson pressure bar (SHPB) test device with 100 mm diameter V2512 high-speed digital camera. The Digital Image Correlation (DIC) technique used to analyze fracture process crack propagation behavior obtain their tensile energy dissipation. experimental results...
For nonpolymeric supercooled liquids, the empirical correlation m = 56Tg DeltaCp(Tg)/DeltaHm provides a reliable means of correlating dynamic and thermodynamic variables. The dynamics are characterized by fragility or steepness index glass transition temperature Tg, while thermodynamics enter in terms heat capacity step DeltaCp at Tg melting enthalpy DeltaHm. combination above with 23 rule for Tg/Tm ratio yields an expression, 40DeltaCp(Tg)/DeltaSm, which was rationalized as kinetic...
Ionic liquids based on various chelated orthoborate anions of different N-containing onium cations have been synthesized using an economic synthesis strategy. Most orthoborates do not crystallize. They are found to much higher glass transition temperatures and room-temperature viscosities than those with perfluorinated such as TFSI-, BF4-, CF3SO3- (Tf-), predicted from anion polarizability arguments. The ambient conductivities the new ionic low relative anions. transport properties all show...
Most glass-forming systems are composed of basic units interacting with each other a nontrivial anharmonic potential. Naturally, relaxation and diffusion in glass formers is many-body problem. Results from recent experimental studies presented to show the effects manifested on dynamic properties formers. Considering that general critical, problem transition will not be solved until nature process has been incorporated fundamentally into any theory.
In this work, self‐supporting three‐dimensional hierarchical nanostructured MoS 2 @Ni(OH) nanocomposites are synthesized via a facile single‐mode microwave hydrothermal technique. The fabricated for supercapacitors in aqueous electrolyte exhibit higher specific capacitance and better cyclic stability than those of Ni(OH) due to the pronounced synergistic effect between . Further, flexible all‐solid‐state supercapcitor is readily constructed by composing PVA/KOH gel two electrodes on PET...
We describe a combination of laboratory and simulation studies that give quantitative information on the energy landscape for glass-forming liquids. Both types study focus idea suddenly extracting thermal energy, so system obtained subsequent has structure, hence potential liquid at much higher temperature than normal glass Tg. One type gives can be trapped in experimental glasses by hyperquenching, relative to glass, magnitude barriers separating basins attraction landscape. Stepwise...
Elemental carbon exists in various aesthetically pleasing architectures. These forms include a group of synthesized allotropes with cubic modifications that have taken controversial or even unidentified crystal structures, which makes determining their physical properties difficult. In this study, four novel polymorphs (fcc-C10, fcc-C12, bcc-C20, and fcc-C32) exhibit lattice parameters within the same range as those undetermined are proposed by employing newly developed ab initio...
A facile polycrystalline Pb/Sn-codoped In4Pb0.01SnySe3 material is obtained, its thermoelectric performance evaluated, and the intrinsic reasons have been studied. This shows an excellent ZT value of 1.4 at 733 Kelvin, among best values relative materials, thus making it a promising candidate for mid-temperature application.
Relaxation time dispersions in glass forming metallic liquids of diverse fragility characters were reviewed mainly based on mechanical relaxations. The compilation the stretching exponents revealed common nonexponential dynamic features among liquids. time-temperature-superposition law relaxation profiles was identified with an average exponent around 0.5 at low frequency regions near transitions. No notable correlation parameter alloy composition discerned. construction dependence across...
Crystal-growth velocity in metallic melts has been reported by others to increase monotonically with undercooling. Nevertheless, such an observation is not predicted conventional growth theory. In this work, the melt of Zr${}_{50}$Cu${}_{50}$ studied address problem measuring over a wide range undercooling up 325 K. A maximum observed at 200 K instead monotonic literature. We find that planar or dendrite theories can explain value velocity, but location far less than seen experiment. With...
The shear mechanical compliance of the glass−rubber transition or softening zone high molecular weight amorphous polymers typically increases from glassy ∼10−10 cm2/dyn up to rubbery plateau ∼10−6 cm2/dyn. contributions local segmental relaxation and Rouse modes cannot account for entire range compliance, leaving three decades in between their unaccounted for. Although new viscoelastic mechanism called sub-Rouse with length scales intermediate have been found fill void, so far they not...
At temperatures below the nominal glass transition temperature Tgα, structural α-relaxation and Johari-Goldstein (JG) β-relaxation are too slow to contribute susceptibility measured at frequencies higher than 1 GHz. This is particularly clear in neighborhood of secondary Tgβ, which can be obtained directly by positronium annihilation lifetime spectroscopy (PALS) adiabatic calorimetry, or deduced from JG time τβ reaches 1000 s. The fast process such high comes vibrations caged molecules...
In the first two papers separately on polyalcohols and amorphous polymers of this series, we demonstrated that fast dynamics observed in glassy state at high frequencies above circa 1 GHz is caged dynamics. We showed generally intensity changes temperature dependence a THF nearly coincident with secondary glass transition Tgβ lower than nominal Tgα. The phenomenon remarkable, since determined from measurements short time scales typically ns to ps range, while characterizes which...
Abstract Revealing the critical thermodynamic parameters determining glass formation of substances is great significance for understanding transition and guiding composition design glass‐forming materials. Nevertheless, direct access to ability (GFA) by thermodynamics various remains be substantiated. The strategy seek fundamental properties explored several decades ago, as pioneered Angell, arguing that GFA in isomeric xylenes depends on low lattice energy manifested melting point. Here, an...
This study investigated the chitosan (CS)-octenyl succinic anhydride (OSA) starch complex as a stabilizer for Pickering emulsions. We examined effects of OSA concentration (0.5wt%-2.5wt%) and viscosity (OSA1, OSA2, OSA3) on stability physiochemical properties emulsion. The results showed that CS-OSA with 2.0wt% stabilized emulsion exhibited optimal emulsifying capacity. Contact angle analysis, FTIR spectra, XRD were utilized to explore mechanism emulsion, confirmed CS interactions, strong...
Glass transition is a reversible that occurs in most amorphous materials. However, the nature of glass remains far from being clarified. A key to understand clarify what determines temperature (Tg) and liquid fragility (m). Here thermodynamics for 150 different glass-forming systems are studied statistically. It found activation characters energy landscape crucial precisely portray and, particular, both free (G*) entropy (S*) play critical roles. G* Tg, Tg=G*/290+25.5, while S* m,...