A5101408821- Magnetic and transport properties of perovskites and related materials
- 2D Materials and Applications
- Magnetic properties of thin films
- Advanced Condensed Matter Physics
- Graphene research and applications
- Electronic and Structural Properties of Oxides
- Magnetic Properties of Alloys
- Carbon and Quantum Dots Applications
- Multiferroics and related materials
- Nanoparticle-Based Drug Delivery
- Semiconductor materials and interfaces
- Topological Materials and Phenomena
- Thermal Expansion and Ionic Conductivity
- Quantum and electron transport phenomena
- Nanoplatforms for cancer theranostics
- Organic and Molecular Conductors Research
- Ferroelectric and Negative Capacitance Devices
- Quantum Dots Synthesis And Properties
- Nanocluster Synthesis and Applications
- Graphene and Nanomaterials Applications
- Advanced Nanomaterials in Catalysis
- Spectroscopy and Quantum Chemical Studies
- Advanced Thermoelectric Materials and Devices
- Shape Memory Alloy Transformations
- MXene and MAX Phase Materials
Shanghai University
2020-2024
Zhejiang Lab
2023-2024
Oak Ridge National Laboratory
2013-2023
The Ohio State University
2019-2022
Louisiana State University
2017-2019
Oak Ridge Associated Universities
2014-2015
University of Tennessee at Knoxville
2015
Multifunctional hybrid nanoparticles (NPs, ∼100 nm) that combine magnetic Fe3O4 nanocrystals and fluorescent carbon dots (CDs) in porous (C) were successfully synthesized using a one-pot solvothermal method by simply increasing the H2O2 concentration. The resultant Fe3O4@C-CDs NPs not only demonstrate excellent responsive properties (Ms = 32.5 emu g-1) resonance imaging ability (r 674.4 mM-1 s-1) from nanocrystal core, but also exhibit intriguing photoluminescent (quantum yield ∼6.8%)...
Abstract Distinct skyrmion phases at room temperature hosted by one material offer additional degree of freedom for the design topology-based compact and energetically-efficient spintronic devices. The field has been extended to low-dimensional magnets with discovery magnetism in two-dimensional van der Waals magnets. However, creating multiple 2D magnets, especially above temperature, remains a major challenge. Here, we report experimental observation mixed-type skyrmions, exhibiting both...
Multifunctional hybrid nanoparticles have been developed for biomedical applications, including magnetic/NIR-responsive drug release, multicolor cell imaging, and enhanced photothermal therapy.
We study proximity-induced spin–orbit coupling (SOC) in bilayer graphene/few-layer WSe2 heterostructure devices. Contact mode atomic force microscopy (AFM) cleaning yields ultraclean interfaces and high-mobility In a perpendicular magnetic field, we measure the quantum Hall effect to determine Landau level structure presence of out-of-plane Ising in-plane Rashba SOC. A distinct crossing pattern emerges when tuning charge density displacement field independently with dual gates, originating...
A class of multifunctional hybrid nanoparticles (NPs) that can integrate a magnetic core, silver (Ag) nanocrystals, and biocompatible poly(ethylene glycol) (PEG) shell were synthesized characterized their applications as antibacterial agents, optical labels for cellular imaging drug carriers tested. The synthetic strategy involves one-step solvothermal synthesis Fe3O4@PEG template NPs (∼60 nm) with Fe3O4 nanocrystals in the core porous PEG shell, followed by loading situ reduction Ag+ ions...
A simple and facile synthetic strategy is developed to prepare a new class of multifunctional hybrid nanoparticles (NPs) that can integrate magnetic core with silver nanocrystals embedded in porous carbon shell. The method involves one-step solvothermal synthesis Fe3O4@C template NPs Fe3O4nanocrystals the protected by shell, followed loading situ reduction ions shell water at room temperature. core-satellite dumbbell-like nanostructures resulted Fe3O4@C-Ag be readily controlled amount ions....
While the assembled 1D magnetic nanoparticle (NP) chains have demonstrated synergistic effects from individual NPs, it is essential to prepare new NP that can combine magnetism with other important material properties for multifunctional applications. This paper reports fabrication and investigation of a type fluorescent properties, photothermal conversion ability, drug carrier function. The building block NPs are composed Fe3O4 nanocrystals clustered in core carbon dots embedded mesoporous...
Anisotropic Fe3O4 octahedrons are obtained via a simple solvothermal synthesis with appropriate sizes for various technological applications. A complete suite of materials characterization methods confirms the magnetite phase these structures, which exhibit substantial saturation magnetization and intriguing morphologies wide range
Abstract Controlling the multi‐state switching is significantly essential for extensive utilization of 2D ferromagnet in magnetic racetrack memories, topological devices, and neuromorphic computing devices. The development all‐electric functional nanodevices with a rapid reset remains challenging. Herein, to imitate potentiation depression process biological synapses, full‐current strategy unprecedently established by controllable resistance‐state originating from spin configuration...
A metastable phase α-FeSi_{2} was epitaxially stabilized on a silicon substrate using pulsed laser deposition. Nonmetallic and ferromagnetic behaviors are tailored (111) thin films, while the bulk material of is metallic nonmagnetic. The transport property films renders two different conducting states with strong crossover at 50 K, which accompanied by onset transition as well substantial magnetoresistance. These experimental results discussed in terms unusual electronic structure obtained...
Transition-metal dichalcogenide IrTe2 has attracted attention because of striped lattice, charge ordering and superconductivity. We have investigated the surface structure IrTe2, using low energy electron diffraction (LEED) scanning tunneling microscopy (STM). A complex lattice modulations as a function temperature is observed, which shows hysteresis between cooling warming. While bulk 5x1 8x1 phases appear at high temperatures, ground state 6x1 phase, not seen in bulk, transition...
Engineering magnetic anisotropy in a ferro- or ferrimagnetic (FM) thin film is crucial spintronic device. One way to modify the through surface of FM film. Here, we report emergence perpendicular (PMA) induced by interfacial interactions heterostructure comprised garnet ferrimagnet, Y3Fe5O12 (YIG), and low-symmetry, high spin-orbit coupling (SOC) transition metal dichalcogenide, WTe2. At same time, also observed an enhancement Gilbert damping WTe2-covered YIG area. Both magnitude...
Binary Cr-Te compounds are known to exhibit various structures and interesting physical properties, which very sensitive Cr content arrangement. We report the structure properties of a compound $\mathrm{C}{\mathrm{r}}_{12\ensuremath{-}x}\mathrm{T}{\mathrm{e}}_{16}$ with $x\ensuremath{\sim}2.65$. $\mathrm{C}{\mathrm{r}}_{9.35}\mathrm{T}{\mathrm{e}}_{16}$ crystallizes in trigonal space group $P\overline{3}m1$ (No. 164), consisting four different sites (Cr1, Cr2, Cr3, Cr4) an ordered Cr4 vacant...
\b{eta}-Mn-type CoxZnyMnz (x + y z = 20) alloys have recently attracted increasing attention as a new class of chiral magnets with skyrmions at and above room temperature. However, experimental studies on the transport properties this material are scarce. In work, we report successful growth Co9.24Zn9.25Mn1.51 Co9.02Zn9.18Mn1.80 single crystals systematic study their magnetic properties. The skyrmion phase was found in small temperature range just below Curie isothermal ac susceptibility dc...
We report the synthesis of single-crystal iron germanium nanowires via chemical vapor deposition without assistance any catalysts. The assembly FeGe2 with tetragonal C16 crystal structure shows anisotropic magnetic behavior along radial direction or growth axial direction, both antiferromagnetic and ferromagnetic orders. Single nanowire devices were fabricated using e-beam lithography. Electronic transport measurement in these show two resistivity anomalies near 250 K 200 which are likely...
We use magnetotransport measurements to probe quantum Hall ground states in graphene/${\mathrm{WSe}}_{2}$ heterobilayers. Compared pristine graphene, inter-Landau level (LL) gaps at half-filled quartets away from filling factor $\ensuremath{\nu}=0$ show significantly weaker dependence on the magnetic field $B$, while odd $\ensuremath{\nu}$ fillings a stronger dependence. interpret this behavior using model incorporating Ising and Rashba spin-orbit coupling (SOC) along with Coulomb...
We have utilized second harmonic generation (SHG) to disentangle the coupled first-order charge order/structural transition at in transition-metal dichalocogenide IrTe2, an exceptional layered material with 3D properties. The data from SHG shows extremely sharp both cooling and warming processes less than 0.2 K window. Surface electronic symmetries of S 2 are observed high temperature low phases, respectively. Compared neutron diffraction for structural (Phys. Rev. B 88 (2013) 115122)...
Here, we report an anisotropic giant magnetoresistance (GMR) effect and de Hass–van Alphen (dHvA) oscillation phenomena in nominal TaNiTe5 single crystals. exhibits the GMR with maximum value of ∼3 × 103% at T = 1.7 K B 31 T, no sign saturation. The two-band model fitting Hall resistivity indicates that anomalous was derived from coexistence electron hole carriers. When external magnetic field is applied to electron–hole resonance, enhanced. dHvA data multiple frequencies reveal topological...
Abstract Rational control of local strain distributions and thus the functional properties epitaxial thin films has been a long‐standing goal in development new physics novel devices based on strain‐sensitive materials. Here, fabrication La 2/3 Sr 1/3 MnO 3 (LSMO) with fields arising from vertical embedding ultra‐small ZrO 2 nanopillars, diameter 4.0 ± 0.6 nm, is reported. High quality are obtained average distance between adjacent nanopillars 9.0 0.3 nm for x = 0.2 1− :(ZrO ) . The...
Journal Article Atomic Resolution STEM-EELS Study of Transition Electronic Localization State Induced by Strain Get access Yuze Gao, Gao Department Physics, Shanghai University, 200444, PR China Search for other works this author on: Oxford Academic Google Scholar Manuel A Roldan, Roldan Materials Science and Technology Division, Oak Ridge National Laboratory, Ridge, TN 37831-6056, USADept. Fisica Aplicada III & Instituto Pluridisciplinar, Universidad Complutense de Madrid, Ciudad...