A5074035942- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- ZnO doping and properties
- Physics of Superconductivity and Magnetism
- Copper-based nanomaterials and applications
- Magnetic and transport properties of perovskites and related materials
- Ga2O3 and related materials
- Advanced Nanomaterials in Catalysis
- Electronic and Structural Properties of Oxides
- Advanced Sensor and Energy Harvesting Materials
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Microwave Dielectric Ceramics Synthesis
- Electrospun Nanofibers in Biomedical Applications
- Graphene research and applications
- Metal and Thin Film Mechanics
- Ferroelectric and Piezoelectric Materials
- Aluminum Alloys Composites Properties
- Nanocluster Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Carbon Nanotubes in Composites
- Photorefractive and Nonlinear Optics
- Topological Materials and Phenomena
- Nanowire Synthesis and Applications
- Additive Manufacturing Materials and Processes
Qilu Hospital of Shandong University
2024
Dezhou University
2024
Donghua University
2023
Los Alamos National Laboratory
2003-2012
National High Magnetic Field Laboratory
2012
Center for Integrated Nanotechnologies
2012
University of California, Davis
2011
Improved electron transport along a carbon nanotube (CNT) fiber when it is spun from an array of longer nanotubes reported. The effect chemical post-treatments also demonstrated. For example, the covalent bonding gold nanoparticles to CNT fibers remarkably improves conductivity (see figure), whereas annealing in hydrogen-containing atmosphere leads dramatic decrease conductivity. Supporting information for this article available on WWW under...
Remarkable progress has been made in the development of YBa2Cu3O7−δ (YBCO)-based coated conductors, and problems continuous processing commercially viable tape lengths are being rapidly solved by companies around world. However, current carried these tapes is presently limited to about 100A for a 1-cm-wide tape, this due rapid decrease critical density (Jc) as coating thickness increased. We have now overcome problem separating relatively thin YBCO layers with very CeO2. Using multilayer...
We report magneto-transport studies of topological insulator Bi2Te3 thin films grown by pulsed laser deposition. A non-saturating linear-like magneto-resistance (MR) is observed at low temperatures in the magnetic field range from a few Tesla up to 60 Tesla. demonstrate that strong MR high can be well understood as weak antilocalization phenomena described Hikami-Larkin-Nagaoka theory. Our analysis suggests our system, insulator, elastic scattering time longer than spin-orbit time. briefly...
A new form of carbon-nanotube (CNT) material, CNT cotton, which is analogous to conventional cotton in many aspects including the color and fluffiness, synthesized (see figure). The composed ultralong individual CNTs exhibits excellent hydrophobicity. This material shows great potential for large-scale fiber production.
Anisotropic in-plane strain can be induced in (Pb,Sr)TiO3 (PST) thin film by using orthorhombic NdGaO3 (110) as a substrate. High-resolution x-ray diffraction was used to measure the of PST film. A rocking curve with full width at half maximum ∼0.04° illustrated that had nearly perfect single-crystalline quality. Reciprocal space maps around (001), (103), and (013) reflections revealed anisotropic 485 ppm along [100] 26 [010], respectively. Coplanar capacitance measurements also showed...
Ternary Zn1−xCdxO films were grown on (0001) sapphire substrates by pulsed laser deposition. The energy band gap of decreases with increasing Cd content. An increase content also leads to the emission broadening, absorption edge and crystallinity degradation. ultraviolet shift lower from 3.357eVto3.295eV 3.338eVto3.157eV, respectively, 0.3% 3% at 4K. Stokes’ between is observed that indicates exciton localization
Zn 1 − x Cd O thin films were deposited on (0001) sapphire substrates by pulsed-laser deposition. Structural and optical properties of Zn1−xCdxO strongly correlated to the processing conditions. The composition varied nonmonotonically as a function deposition temperatures due difference vapor pressure between species. energy bandgap films, measured photoluminescence transmittance, changed from 3.249to3.291eV. change was mainly attributed stoichiometry Zn1−xCdxO, determined Rutherford...
Epitaxial behavior of (Pb,Sr)TiO3 thin films on (110) NdGaO3 substrates fabricated in different conditions have been investigated using high resolution x-ray diffraction and characterized with interdigital dielectric measurement. A slow cooling results a-axis normal to the surface (a-axis growth), whereas a fast leads growth c-axis oriented films. The properties prepared under rates are closely related crystalline structure
We have grown epitaxial films of La0.67Sr0.33MnO3 (LSMO) and La0.67Ca0.33MnO3 (LCMO) on single crystalline LaAlO3 substrates by a cost effective polymer-assisted deposition technique. Film crystallinity, microstructure, resistivity, magnetization, magnetoresistance (MR) were highly dependent the annealing temperature in film processing. High negative MR values −50% (at 305K) −88% 250K) observed at magnetic field 5T, for high annealed LSMO LCMO films, respectively. These results are...
We report on the structural and transport properties of EuBa2Cu3O7−x (Eu123) films SrTiO3 substrates. A substrate temperature 100 °C higher than that used to deposit YBa2Cu3O7−x (Y123) is needed grow high-performance Eu123 directly However, this high-temperature restriction can be circumvented by inserting a seed layer (∼12 nm) Y123, Gd123, or Dy123 between Eu123. analysis reveals transition region promotes growth a-axis first formed surface if deposited at less 800 °C. On other hand, use...
In recent years, the rapid advancement of flexible conductive materials has significantly increased demand for dough that offer high flexibility and conductivity diverse applications. Here, we developed a flexible, stretchable, self-healing utilizing hydrogen-bonding interactions between glutathione-stabilized copper nanoclusters (GSH-Cu NCs) poly(acrylic acid) (PAA). The can be kneaded, readily reshaped, further processed to create bulk arbitrary form factors. incorporation PAA not only...
Microstructural evolution with the change in thickness of superconducting YBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">7-X</sub> films on single-crystal SrTiO substrates deposited by pulsed laser deposition was evaluated using different structural characterization tools. A noticeable degradation crystallinity increased film detected....
Upconversion nanoparticles (UCNPs) are highly promising candidates for use in medical treatment and biomarker detection. However, the low emission energy of UCNPs near-infrared region (NIR) limits their applicability. In this study, a sandwich structure (NaYF4: Yb3+/Er3+@NaYF4: Yb3+/Tm3+@NaYF4, Er@Tm@Y) with enhanced wide-range fluorescence (400-850 nm) was tailored by carefully controlling shell layer. A Tm3+ introduced as inner shell, which exhibited stronger at 801 nm than that...
Developing efficient near-infrared (NIR) phosphor with an emission peak wavelength over 850 nm is crucial to realize multi-functional spectroscopy applications, while this remains a significant challenge. Herein, garnet-type Na 1.5 Gd Sc 2 Ge 3 O 12 :Cr 3+ located at 882 was created from δ Ca 3-2 (0 ≤ 1.5) solid solutions basing on the effect of cationic disorder. The maximum internal quantum efficiency (IQE) 2- x : Cr reached 84.6% when = 0.01. external (EQE) can be optimized 20.6%. Using...