A5059561416- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Spectroscopy and Quantum Chemical Studies
- Microwave Dielectric Ceramics Synthesis
- Perovskite Materials and Applications
- Enzyme Structure and Function
- Magnetic and transport properties of perovskites and related materials
- nanoparticles nucleation surface interactions
- Advanced Thermodynamics and Statistical Mechanics
- Protein Structure and Dynamics
- Advanced Chemical Physics Studies
- Machine Learning in Materials Science
- Material Dynamics and Properties
- Force Microscopy Techniques and Applications
- Phase Equilibria and Thermodynamics
- Boron and Carbon Nanomaterials Research
- Advanced ceramic materials synthesis
- Peptidase Inhibition and Analysis
- Dielectric materials and actuators
- Advanced Physical and Chemical Molecular Interactions
- Advanced Condensed Matter Physics
Shanghai Institute of Ceramics
2019-2024
Chinese Academy of Sciences
2019-2024
Westlake University
2024
University of Chinese Academy of Sciences
2019-2022
Central South University
2018-2022
State Key Laboratory of Powder Metallurgy
2018-2020
Northeastern University
2016
University of Washington
1998
Cornell University
1988-1990
Abstract Benefitting from the reversible phase transition between antiferroelectric and ferroelectric states, materials have recently received widespread attentions for energy storage applications. Antiferroelectric configuration with specific antiparallel dipoles has been used to establish theories understand its characteristic behaviors. Here, we report that so-called (Pb,La)(Zr,Sn,Ti)O 3 system is actually ferrielectric in nature. We demonstrate different configurations, which consists of...
The devil's staircase, describing step-like function for two competing frequencies, is well known over a wide range of dynamic systems including Huyghens' clocks, Josephson junction, and chemical reaction. In condensed matter physics, the staircase has been observed in spatially modulated structures, such as magnetic ordering. It draws widespread attentions because it plays crucial role fascinating phenomena phase-locking behaviors, commensurate-incommensurate phase transition, spin-valve...
Phase boundary provides a fertile ground for exploring emergent phenomena and understanding order parameters couplings in condensed-matter physics. In Pb(Zr1-xTix)O3, there are two types of composition-dependent phase with both technological scientific importance, i.e. morphotropic (MPB) separating polar regimes into different symmetry ferroelectric/antiferroelectric (FE/AFE) dividing antipolar dipole configurations. contrast extensive studies on MPB, FE/AFE is far less explored. Here, we...
Dislocations in perovskite oxides have an important influence on their macroscopic performances. In this work, we report abundant dislocations PbZrO3-based antiferroelectric (AFE) ceramics, which manifest themselves mainly as dislocation arrays with Burgers vectors along the <110> direction. We demonstrate that these were emitted from grain boundaries and exhibit a pure screw character glide systems of <110>{$$ 1\bar{1} 0 $$ }. The situ transmission electron microscopy...
Antiferroelectric materials has become one of the most promising candidates for pulsed power capacitors. The polarization versus electric-field hysteresis loop is key electrical property evaluating their energy-storage performance. Here, we applied in situ biasing transmission electron microscopy to decode two representative behaviors-namely, multiple and double loops-in (Pb,La)(Zr,Sn,Ti)O3 system. Simultaneous structural examination domain/defects observation establish a direct relationship...
Antiferroelectric perovskite oxides, which can undergo ultrafast charge/discharge with a large energy storage density, are among the most important functional materials for applications in pulsed power capacitors. Owing to complex modulation of atomic displacement, variety interfacial defects have been observed within single antiferroelectric domain. However, intercorrelation between different is still less understood. Here, we report finding evolution by compositional design PbZrO3-based...
The capacitors are in rising demand for cryogenic applications. As now, it still remains an ongoing challenge simultaneously achieving high energy storage density and temperature stability. Herein, the strategy of stable backward phase transition was demonstrated antiferroelectric composition (Pb0.9175La0.055)(Zr0.975Ti0.025)O3. a result, we achieved recoverable about 10 J/cm3 with exceptional low-temperature stability from −160 to 25 °C. Multi-layer ceramic designed pulse discharge...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonte Carlo recursion evaluation of free energyZhenqin Li and Harold A. ScheragaCite this: J. Phys. Chem. 1988, 92, 9, 2633–2636Publication Date (Print):May 1, 1988Publication History Published online1 May 2002Published inissue 1 1988https://pubs.acs.org/doi/10.1021/j100320a046https://doi.org/10.1021/j100320a046research-articleACS PublicationsRequest reuse permissionsArticle Views95Altmetric-Citations19LEARN ABOUT THESE METRICSArticle Views are the...
Abstract Quantum‐mechanical electron density calculations reveal that a significant polarization is induced in the cofactor NADPH (reduced nicotinamide adenine dinucleotide phosphate) on binding to enzyme dihydrofolate reductase. The indicate corresponding ∼0.7 charges shifted within molecule, extending over more than 20Å. Further proposed mutants show of DHFR is, large part, by motif three positively charged residues. This was also identified be directly responsible for positive...
A new conformational search method, molecular dynamics–minimization (MDM), is proposed, which combines a dynamics sampling strategy with energy minimizations in the for low-energy structures. This method applied to low configurations of clusters coulombic charges on unit sphere, Lennard–Jones clusters, and water clusters. The MDM shown be efficient finding lowest these closer comparison alternative methods shows that, although not as Monte Carlo–minimization locating global minima, it more...
A flexible carbon nanofiber film with high conductivity was prepared by electrospinning, and then Cu uniformly deposited on the fiber pulse electrodeposition to prepare nanocrystal/carbon film. Cu@PtCu/carbon (Cu@PtCu/CNF) catalytic films were synthesized in-situ substitution reduction. The Cu@PtCu/CNF solves problem of uneven activity layer can be directly used as layer. morphology structure characterized transmission electron microscopy (TEM), scanning (SEM), X-ray diffraction (XRD),...
A general formalism of cluster formation from monatomic vapor is developed, based on classical statistical mechanics in the isothermal–isobaric ensemble. The Gibbs free energy clusters a constrained equilibrium with can be computed efficiently using Monte Carlo recursion procedure. application our theory and method to study homogeneous nucleation argon cluster, shows that small under supersaturation conditions tend have lower effective density compared corresponding bulk liquid, more...
Polarons play an important role in properties such as charge transport and phase segregation halide perovskite optoelectronics. Extensive spectroscopic investigations have been performed on polarons perovskites, revealing their spectral temporal characteristics the photocarrier lattice regimes. In this Perspective, we review capabilities of respective techniques key that experimentally observed framework Fröhlich polaron model. We analyze how transmission electron microscopy (TEM) related...
Ultrafast spin manipulation for optical spin-logic applications requires material systems with strong spin-selective light-matter interactions. The Stark effect can realize interactions by breaking the degeneracy of transitions an external electric field. Halide perovskites have large exciton binding energies, which enable a room-temperature effect. However, halide are prone to degradation when interacting light and polar solvents, limiting further integration nanophotonic structures. We...