A5100429893- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Advanced Condensed Matter Physics
- Mesoporous Materials and Catalysis
- Magnetism in coordination complexes
- Multiferroics and related materials
- Organic and Molecular Conductors Research
- Layered Double Hydroxides Synthesis and Applications
- Catalytic Processes in Materials Science
- Metal-Organic Frameworks: Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Lanthanide and Transition Metal Complexes
- Topological Materials and Phenomena
- Aerogels and thermal insulation
- Ferroelectric and Negative Capacitance Devices
- Advanced Memory and Neural Computing
- Radioactivity and Radon Measurements
- Radiation Therapy and Dosimetry
- Covalent Organic Framework Applications
- Zeolite Catalysis and Synthesis
- Luminescence Properties of Advanced Materials
- Advanced materials and composites
- Inorganic Fluorides and Related Compounds
- Catalysis and Hydrodesulfurization Studies
- Effects of Radiation Exposure
State Key Laboratory of Surface Physics
2019-2024
Fudan University
2009-2024
ShangHai JiAi Genetics & IVF Institute
2023
Heilongjiang University
2013-2014
Monash University
2010
In this paper, an efficient route is developed for controllable synthesis of ordered mesoporous alumina (OMA) materials with variable pore architectures and high mesoporosity, as well crystalline framework. The based on the nanocasting pathway bimodal carbon hard template. contrast to conventional reports, we first realize possibility creating two mesopore by using a single template obtained from organic−organic self-assembly, which also time such are adopted replicate materials....
Artificial spin ice (ASI) consisting patterned array of nano-magnets with frustrated dipolar interactions offers an excellent platform to study physics using direct imaging methods. Moreover, ASI often hosts a large number nearly degenerated and non-volatile states that can be used for multi-bit data storage neuromorphic computing. The realization the device potential ASI, however, critically relies on capability transport characterization which has not been demonstrated so far. Using...
Mesoporous silica encapsulating upconversion luminescence NaYF(4) nanorods with uniform core-shell structures have been successfully synthesized by the surfactant-assistant sol-gel process. The thickness of ordered mesoporous shells can be adjusted from 50 to 95 nm varying amount hydrolyzed silicate oligomer precursors tetraethyl orthosilicate (TEOS), which further influences BET surface area, pore volume, and intensity. After coated shells, hydrophobic is rendered hydropholic...
Ordered mesostructured tungsten carbide and graphitic carbon composites (WC/C) with nanocrystalline walls are fabricated for the first time by a temperature-programmed carburization approach phosphotungstic acid (PTA) as precursor mesoporous silica materials hard templates. The mesostructure, crystal phase, amount of deposited can be conveniently tuned controlling template (SBA-15 or KIT-6), carburizing temperature (700-1000 degrees C), PTA-loading amount, atmosphere (CH(4) CH(4)/H(2)...
The hydrothermal stability of mesostructured cellular silica foams (MCFs) was studied in detail for the first time, using a variety techniques including transmission electron microscopy, nitrogen sorption, small-angle X-ray scattering, 29Si solid-state nuclear magnetic resonance, and Fourier transform infrared spectroscopy. It found that high aging temperature, greater microporosity, calcination temperature contribute to MCFs high-temperature steam. frameworks calcined at 550 °C are stable...
Abstract Tailoring molecular spinterface between novel magnetic materials and organic semiconductors offers promise to achieve high spin injection efficiency. Yet it has been challenging simultaneously a nonvolatile control of magnetoresistance effect in spintronic devices. To date, the largest (~300% at T = 10 K) reached tris-(8-hydroxyquinoline) aluminum (Alq 3 )-based valves (OSVs) using La 0.67 Sr 0.33 MnO as electrode. Here we demonstrate that one type perovskite manganites, i.e., (La...
Abstract The biodosimetric information is critical for evaluating the human health hazards caused by radon and its progeny. Here, we demonstrated that formation of phosphorylated histone variant H2AX (γ-H2AX), p53-binding protein 1 (53BP1) KRAB-associated (pKAP-1) foci their linear tracks in peripheral blood lymphocytes (HPBLs) vitro exposed to progeny were dependent on cumulative absorbed dose exposure but was unrelated concentration radon. Among them, γ-H2AX most sensitive indicators with...
Strongly correlated materials often exhibit an electronic phase separation (EPS) phenomena whose domain pattern is random in nature. The ability to control the spatial arrangement of phases at microscopic scales highly desirable for tailoring their macroscopic properties and/or designing novel devices. Here we report formation EPS nanoscale network a mono-atomically stacked LaMnO3/CaMnO3/PrMnO3 superlattice grown on SrTiO3 (STO) (001) substrate, which known have antiferromagnetic (AFM)...
The physical properties of manganites depend sensitively on their lattice degree freedom. While parameter can be controlled by growing epitaxial thin films substrates with different constants or application high pressure, the range variation is limited to 2--3% before dislocations start emerge. In contrast, fabrication freestanding allows one change uniaxial up 8.2%, which opens a new platform investigate emergent phenomena under large lattice-constant change. this work, we fabricate...
Manganites are an important class of materials that exhibit a large magnetocaloric effect (MCE). The MCE is often accompanied by complex magnetic phase transitions associated with electronic separation (EPS) in manganites. In previous studies, the EPS on has been examined chemically synthesized manganite nanoparticles, which vanishes when particle size smaller than few tens nanometers. However, surface area to volume ratio high these small nanoparticles and spin disordering can lead...
Abstract The biodosimetric information is critical for assessment of cancer risk in populations exposed to high radon. However, no tools are available biological dose estimation following radon exposure. Here, we established a γ-H2AX foci-based assay determine red bone marrow (RBM) radon-inhaled rats. After 1–3 h vitro exposure, specific pattern foci, linear tracks with individual p-ATM and p-DNA-PKcs was observed, the yield foci its displayed dose-response manner both rat peripheral blood...
Three new 7,7,8,8-tetracyanoquinodimethane (TCNQ) alkaline-earth metal complexes, namely {[M2(TCNQ)3(H2O)6]·TCNQ}n (M = Ca (1), Sr (2) and Ba (3)) have been synthesized by salt elimination reactions. X-ray crystallographic analysis reveals that complexes 1, 2 3 are isomorphic featuring a unique 3D structure. Cyclic differential pulse voltammograms for 1–3 show reversible one-electron oxidation reduction within the electrochemical window of CH3CN. Their HOMO–LUMO gap reversibility examined.
Studying manganite superlattices ${[{(\mathrm{LCMO})}_{2n}/{(\mathrm{PCMO})}_{n}]}_{t}$ made of ${\mathrm{La}}_{0.625}{\mathrm{Ca}}_{0.375}\mathrm{Mn}{\mathrm{O}}_{3}$ (LCMO) and ${\mathrm{Pr}}_{0.625}{\mathrm{Ca}}_{0.375}\mathrm{Mn}{\mathrm{O}}_{3}$ (PCMO), we found an unexpected behavior varying the period $n$. At small $n$, ensemble is a three-dimensional ferromagnetic metal due to interfacial charge transfer. large LCMO layers dominate transport. However, rather than smooth interpolation...
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We reported a study of tunnel magnetoresistance (TMR) effect in single manganite nanowire via the combination magnetotransport and magnetic force microscopy imaging. TMR value up to 290% has been observed (La 1 − y Pr ) x Ca MnO 3 nanowires with varying width. find that can be explained scenario opening blockade conducting channels from inherent domain evolutions. Our findings provide new route fabricate junctions point towards future improvements complex oxide-based spintronics.
For perovskite manganites, their colossal magnetoresistance (CMR) requires a large field, which limits potential applications. In order to uncover the path achieve low-field CMR, it is crucial understand microscopic process of field driven insulator-to-metal transition (IMT) in manganites. This particularly true considering fact that IMT percolative type, interplay between nucleation and growth electronic phase separation domains under magnetic not well investigated. this work, we...