A5075767125- Magnetic properties of thin films
- 2D Materials and Applications
- Graphene research and applications
- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Memory and Neural Computing
- Ferroelectric and Piezoelectric Materials
- MXene and MAX Phase Materials
- Physics of Superconductivity and Magnetism
- Topological Materials and Phenomena
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- ZnO doping and properties
- Metamaterials and Metasurfaces Applications
- Ferroelectric and Negative Capacitance Devices
- Perovskite Materials and Applications
- Quantum and electron transport phenomena
- Advanced Condensed Matter Physics
- Plasmonic and Surface Plasmon Research
- Electronic and Structural Properties of Oxides
- Theoretical and Computational Physics
- Carbon Nanotubes in Composites
- Advancements in Battery Materials
- Semiconductor materials and devices
- Heusler alloys: electronic and magnetic properties
King Abdullah University of Science and Technology
2016-2025
Massachusetts Institute of Technology
2024
East China University of Science and Technology
2021-2024
China Southern Power Grid (China)
2024
University of Science and Technology
2014-2024
State Grid Corporation of China (China)
2024
Guangxi Hydraulic Power Machinery Research Institute
2022-2023
State Key Laboratory of Chemical Engineering
2021-2022
Nanchang University
2021
Tianjin University
1987-2020
We have fabricated sonic crystals, based on the idea of localized resonant structures, that exhibit spectral gaps with a lattice constant two orders magnitude smaller than relevant wavelength. Disordered composites made from such structures behave as material effective negative elastic constants and total wave reflector within certain tunable frequency ranges. A 2-centimeter slab this composite is shown to break conventional mass-density law sound transmission by one or more at 400 hertz.
Defects usually play an important role in tailoring various properties of two-dimensional materials. monolayer molybdenum disulphide may be responsible for large variation electric and optical properties. Here we present a comprehensive joint experiment-theory investigation point defects prepared by mechanical exfoliation, physical chemical vapour deposition. Defect species are systematically identified their concentrations determined aberration-corrected scanning transmission electron...
Magnetization of the compound LaFe11.4Si1.6 with cubic NaZn13-type structure was measured as functions temperature and magnetic field around its Curie TC ∼208 K. It is found that phase transition at completely reversible. Magnetic entropy change ΔS, allowing one to estimate magnetocaloric effect, determined based on thermodynamic Maxwell relation. The achieved magnitude |ΔS| reaches 19.4 J/kg K under a 5 T, which exceeds most other materials involving reversible in corresponding range. large...
We report on the use of dopamine (DA) as a robust molecular anchor to link functional molecules iron oxide shell magnetic nanoparticles. Using nitrilotriacetic acid (NTA) molecule, we created system with an M/Fe2O3-DA-NTA (M = Co or SmCo5.2) nanostructure, which possesses high stability and specificity for separating histidine-tagged proteins. The well-established biocompatibility covalent bonds between DA Fe2O3 render this strategy attractive constructing biofunctional nanoparticles...
Abstract Cost‐effective aqueous rechargeable batteries are attractive alternatives to non‐aqueous cells for stationary grid energy storage. Among different cells, zinc‐ion (ZIBs), based on Zn 2+ intercalation chemistry, stand out as they can employ high‐capacity metal the anode material. Herein, we report a layered calcium vanadium oxide bronze cathode material batteries. For storage of ions in electrolyte, demonstrate that calcium‐based structure deliver high capacity 340 mA h g −1 at 0.2...
Fibrous nanosilica: A new family of high-surface-area silica nanospheres (KCC-1) have been prepared (see picture). KCC-1 features excellent physical properties, including high surface area, unprecedented fibrous morphology, thermal (up to 950 °C) and hydrothermal stabilities, mechanical stability. Detailed facts importance specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by the authors....
Sequential addition of sulfur and Cd(acac)2 into the colloid solution FePt nanoparticles (∼2.5 nm) under a reductive environment generates heterodimers CdS with sizes ∼7 nm. The exhibit both superparamagnetism fluorescence, indicating that discrete properties individual parts dimers are preserved. This simple methodology may lead to production large quantities various heterostructures tailored on nanoscale.
A superior piezoelectric coefficient (d33 = 570 ± 10 pC N"1 ), the highest value reported to date in potassium-sodium niobate-based ceramics, is obtained (1-x-y)K1-w Naw Nb1-z Sbz O3-y BaZrO3-x - Bi0.5 K0.5 HfO3 ceramics. This high d33 can be ascribed co-existence of "nano-scale strain domains" (1-2 nm) and a density ferroelectric domain boundaries. Therefore, ternary KNN-based ceramics demonstrate potential for applications.
Enriching the functionality of ferroelectric materials with visible-light sensitivity and multiaxial switching capability would open up new opportunities for their applications in advanced information storage diverse signal manipulation functions. We report experimental observations robust intralayer ferroelectricity two-dimensional (2D) van der Waals layered α-In2Se3 ultrathin flakes at room temperature. Distinct from other 2D conventional ferroelectrics, In2Se3 exhibits intrinsically...
Functionalized graphene has been extensively studied with the aim of tailoring properties for gas sensors, superconductors, supercapacitors, nanoelectronics, and spintronics. A bottleneck is capability to control carrier type density by doping. We demonstrate that a two-step process an efficient way dope graphene: create vacancies high-energy atom/ion bombardment fill these desired dopants. Different elements (Pt, Co, In) have successfully doped in single-atom form. The high binding energy...
Using Nalpha,Nalpha-bis(carboxymethyl)lysine to react with FePt magnetic nanoparticles, we synthesized the FePt-NTA conjugate, which immobilizes Ni2+ ions and selectively binds histidine-tagged proteins at concentration as low 0.5 pM. This simple system serves a useful alternative existing protocols for protein separation also acts versatile agent transporting anchoring proteins.
We demonstrate that poly(vinylidene fluoride) (PVDF)-based percolative composites using two-dimensional (2D) MXene nanosheets as fillers exhibit significantly enhanced dielectric permittivity. The fluoride-trifluoro-ethylene-chlorofluoroehylene) (P[VDF-TrFE-CFE]) polymer embedded with 2D Ti3C2Tx reaches a permittivity high 105 near the percolation limit of about 15.0 wt % loading, which surpasses all previously reported made carbon-based in same polymer. With up to 10 loss...
We report the evaluation of cytotoxicity a new type engineered nanomaterials, FePt@CoS2 yolk−shell nanocrystals, synthesized by mechanism Kirkendall effect when FePt nanoparticles serve as seeds. The evaluated MTT assay, shows much lower IC50 (35.5 ± 4.7 ng Pt/mL for HeLa cell) than that cisplatin (230 Pt/mL). In control experiment, cysteine-modified exhibit at 12.0 0.9 μg Pt/mL. Transmission electron microscopy confirms cellular uptake and magnetic properties analysis (SQUID) proves release...
We report a new type of multifunctional nanomaterials, FePt@Fe2O3 yolk-shell nanoparticles, that exhibit high cytotoxicity originated from the FePt yolks and strong MR contrast enhancement resulting Fe2O3 shells. Encouraged by recently observed FePt@CoS2 we used to replace CoS2 as shells further explore applications nanostructures. The ultralow IC50 value (238 +/- 9 ng Pt/mL) nanoparticles likely originates fact slow oxidation release increases cytotoxicity. Moreover, compared with two...
Recently, a type-II Weyl fermion was theoretically predicted to appear at the contact of electron and hole Fermi surface pockets. A distinguishing feature surfaces semimetals is existence topological states, so-called arcs. Although WTe2 first material suggested as semimetal, direct observation its tilting cone arc has not yet been successful. Here, we show strong evidence that semimetal by observing two unique transport properties simultaneously in one nanoribbon. The negative...
Significance Intravasation is an early stage of metastasis that involves metastatic cells moving from the tumor into extracellular matrix (ECM), breakthrough basement membrane, and entry blood vessels. We found oriented fibers greatly enhance facilitate cell intravasation process during metastasis. suggest a possible “tissue treatment” therapy could be considered, in which ECM fiber structure orientation microenvironment might altered to minimize rate cells.
The recent discovery of ferromagnetism in two-dimensional (2D) van der Waals (vdW) materials holds promises for spintronic devices with exceptional properties. However, to use 2D vdW magnets building nanodevices such as magnetic memories, key challenges remain terms effectively switching the magnetization from one state other electrically. Here, we devise a bilayer structure Fe3GeTe2/Pt, which few-layered Fe3GeTe2 can be switched by spin-orbit torques (SOTs) originated current flowing Pt...
Abstract 2D ferroelectric material has emerged as an attractive building block for high‐density data storage nanodevices. Although monolayer van der Waals ferroelectrics have been theoretically predicted, a key experimental breakthrough such calculations is still not realized. Here, hexagonally stacking α‐In 2 Se 3 nanoflake, rarely studied polymorph, reported to exhibit out‐of‐plane (OOP) and in‐plane (IP) ferroelectricity at room temperature. Ferroelectric multidomain states in hexagonal...
Abstract The promise of high-density and low-energy-consumption devices motivates the search for layered structures that stabilize chiral spin textures such as topologically protected skyrmions. At same time, recently discovered long-range intrinsic magnetic orders in two-dimensional van der Waals materials provide a new platform discovery novel physics effects. Here we demonstrate Dzyaloshinskii–Moriya interaction Néel-type skyrmions are induced at WTe 2 /Fe 3 GeTe interface. Transport...
Piezoelectric materials have been widely used for sensors, actuators, electronics, and energy conversion. Two-dimensional (2D) ultrathin semiconductors, such as monolayer h-BN MoS2 with their atom-level geometry, are currently emerging new attractive members of the piezoelectric family. However, polarization is commonly limited to in-plane direction odd-number layers, largely restricting application in integrated nanoelectromechanical systems. Recently, theoretical calculations predicted...
Electrical manipulation of skyrmions attracts considerable attention for its rich physics and promising applications. To date, such a is realized mainly via spin-polarized current based on spin-transfer torque or spin-orbital effect. However, this scheme energy-consuming may produce massive Joule heating. reduce energy dissipation risk heightened temperatures skyrmion-based devices, an effective solution to use electric field instead as stimulus. Here, we realize electric-field in...
Here, we report on the experimental discovery of biskyrmion magnetic nanodomains at RT and observation a biskyrmion-derived topological Hall effect (THE) in centrosymmetric hexagonal MnNiGa magnet. Using phase reconstruction technique based transport-of-intensity equation (TIE), established texture spin. Results from Lorentz transmission electron microscopy (TEM) revealed that is stable over much wider temperature range (100 K to ~340K) larger field our material than skyrmion-hosting bulk...
The quest for materials hosting topologically protected skyrmionic spin textures continues to be fueled by the promise of novel devices. Although many have demonstrated existence such textures, major challenges remain addressed before devices based on magnetic skyrmions can realized. For example, being able create and manipulate at room temperature is great importance further technological applications because they adapt various external stimuli acting as information carriers in spintronic...