A5101565283- Photonic and Optical Devices
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Photorefractive and Nonlinear Optics
- Ferroelectric and Piezoelectric Materials
- Magnetic and transport properties of perovskites and related materials
- Polymer Foaming and Composites
- Physics of Superconductivity and Magnetism
- Semiconductor materials and devices
- Fatigue and fracture mechanics
- Aerogels and thermal insulation
- Acoustic Wave Resonator Technologies
- Advanced Battery Materials and Technologies
- Advanced Condensed Matter Physics
- Advancements in Battery Materials
- Transition Metal Oxide Nanomaterials
- Advanced ceramic materials synthesis
- Ga2O3 and related materials
- Iron-based superconductors research
- Photonic Crystals and Applications
- Crystallography and molecular interactions
- Engineering Structural Analysis Methods
- Gas Dynamics and Kinetic Theory
- Hydrogen embrittlement and corrosion behaviors in metals
- Solid-state spectroscopy and crystallography
State Key Laboratory of Chemical Engineering
2022-2025
East China University of Science and Technology
2011-2025
Suzhou Nonferrous Metals Research Institute
2025
National University of Singapore
2005-2024
University of Tennessee at Chattanooga
2022
Institute of New Materials
2021
Nanyang Technological University
2021
Anhui University
2021
Southern University of Science and Technology
2021
Queensland University of Technology
2021
We report the observation of superconductivity in infinite-layer Ca-doped LaNiO 2 (La 1− x Ca NiO ) thin films and construct their phase diagram. Unlike metal-insulator transition Nd- Pr-based nickelates, undoped underdoped La are entirely insulating from 300 K down to K. A superconducting dome is observed at 0.15 < 0.3 with weakly behavior overdoped regime. Moreover, sign Hall coefficient R H changes low temperature for samples a higher doping level. However, distinct -sign-change...
Nickel-based complex oxides have served as a playground for decades in the quest copper-oxide analog of high-temperature superconductivity. They may provide clues towards understanding mechanism and an alternative route superconductors. The recent discovery superconductivity infinite-layer nickelate thin films has fulfilled this pursuit. However, material synthesis remains challenging, direct demonstration perfect diamagnetism is still missing, role interface bulk to superconducting...
Abstract Electro‐optic modulators are among the most important building blocks in optical communication networks. Lithium niobate, for example, has traditionally been widely used to fabricate high‐speed due its large Pockels effect. Another material, barium titanate, nominally a 50 times stronger r ‐parameter and would ordinarily be more attractive material choice such or other applications. In practice, titanate thin films waveguide devices usually grown on magnesium oxide low refractive...
Ultrathin freestanding membranes with a pronounced metal-insulator transition (MIT) provides huge potential in future flexible electronic applications as well unique aspect of the study lattice-electron interplay. However, reduction thickness to an ultrathin region (a few nm) is typically detrimental MIT epitaxial films, and even catastrophic for their form. Here, we report enhanced VO2-based membranes, lateral size up millimetres VO2 down 5 nm. The VO2-membranes were detached by dissolving...
A robust composite polymer electrolyte is prepared by thermal lamination of PEO films onto lithiated organic nanofibers, combining the merits 3D Li-ion conduction highways and good nanofiber-reinforced mechanical properties.
Abstract Needle‐punched fiber preforms are extensively employed as reinforcements for low‐density thermal protection materials (TPMs) due to their high design flexibility and cost‐effectiveness. However, the inherent complexity randomness of needle‐punched technique present challenges in elucidating impact parameters on mechanical performance these materials. Herein, preforms, including felts (NF) woven fabric/felt (NWF), deliberately designed with varying densities (0, 10, 30, 50 punches/cm...
Abstract We analyzed the dry etching of perovskite oxides using argon-based inductively coupled plasmas (ICP) for photonics applications. Various chamber conditions and their effects on rates have been demonstrated based Z-cut lithium niobate (LN). The measured results are predictable repeatable can be applied to other oxides, such as X-cut LN barium titanium oxide (BTO). surface roughness is better both etched BTO compared with as-deposited counterparts confirmed by atomic force microscopy...
Introducing porosity into structures is recognized as a practical strategy to achieve lightweightness and insulation for ablatives, but reduced matrix density leads the weakening of mechanical anti-ablation performances. Herein, trade-off design porous structure developed integrating high-strength, insulation, abilities mid-density nanoporous phenolic composites (NPC). Benefiting from narrow nanopore size (20–62 nm) matrix, thermal conductivity NPC can be effectively limited within...
Abstract Experimentally achieving the first‐ever electric field periodic poling of single crystal barium titanate oxide (BTO, or BaTiO 3 ) thin film on‐insulator is reported. Owing to outstanding optical nonlinearities BTO, this result a key step toward quasi‐phase‐matching (QPM). First, BTO grown on dysprosium scandate substrate using pulsed laser deposition with layer strontium ruthenate later serving as bottom electrode for poling. The characterization x‐ray diffraction (XRD) and...
Electrolyte gating is widely used to induce large carrier density modulation on solid surfaces explore various properties. Most of past works have attributed the charge electrostatic field effect. However, some recent reports argued that electrolyte effect in VO2, TiO2, and SrTiO3 originated from field-induced oxygen vacancy formation. This gives rise a controversy about mechanism, it therefore vital reveal relationship between role intrinsic properties materials. Here, we report entirely...
Electro-optic materials play an essential role in telecommunications. In active devices like Mach–Zehnder modulators, typically the diagonal Pockels coefficients are employed to induce optical phase shift through electrical tuning of refractive index along optic axis. On other hand, waveguide polarization rotators usually passive where asymmetric structures or specially designed couplers used. this Letter, we exploit off demonstrate straight rotator using a c-axis single crystal thin film...
Barium titanate-on-insulator has demonstrated excellent vertical optical confinement, low loss, and strong electro-optic properties. To fabricate a waveguide-based device, region of higher refractive index must be created to confine propagating mode, one way which is through dry etching form ridge. However, despite recent progress achieved in barium titanate similar materials, the sidewall surface roughness resulting from physical typically used limit achievable ridge depth. This motivates...
We report experimental characterization of DC electro-optic coefficients r 13 , 23 and 33 in thin film single crystalline BaTiO 3 on DyScO . The epitaxial is sandwiched between a SrRuO bottom electrode an indium tin oxide (ITO) top electrode. characterize the by prism coupling method at 636.6 nm for film. results show = 4.2 pm/V, 4.6 pm/V 9.0 pm/V.
The post-breakdown (BD) degradation of ultrathin gate oxide Si MOSFET devices is studied by electrical characterization, cross-sectional transmission electron microscopy (TEM) analysis, and theoretical simulation. It shown that can remain functional even if a physically direct short between the electrode substrate established. On other hand, device suffer from total failure while no physical damages be observed under TEM. location BD point to critical importance in determining type post-BD...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb initio SCF studies of the electronic structures halogen nitrates. 2. FNOx (x = 1, 2, 3)Vernon Morris, Gerald A. Walker, Phelesia Jones, Yu Cao, Subhash C. Bhatia, and John H. Hall Jr.Cite this: J. Phys. Chem. 1989, 93, 20, 7071–7074Publication Date (Print):October 1989Publication History Published online1 May 2002Published inissue 1 October 1989https://pubs.acs.org/doi/10.1021/j100357a011https://doi.org/10.1021/j100357a011research-articleACS...
Adhesive bonding plays a pivotal role in structural connections, yet the strength is notably affected by presence of pore defects. However, invisibility interior pores severely poses challenge to understanding their influence on tensile failure behaviors under loading. In this study, we present pioneering investigation into real-time micro-failure mechanisms adhesively bonded structures using situ X-ray micro-CT. Moreover, high-precision finite element analysis (FEA) stress distribution...
A CMOS-compatible plasmonic waveguide with a metal or metal-like strip sandwiched in-between dielectrics has been proposed for intra-chip communication in the more-than-Moore era. sequence of numerical models presented to evaluate performance. For device-level consideration, we demonstrated through simulations that Cu (1450 nm pitch) and PLD-TiN (900 waveguides symmetrically by SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> much...