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Doping of MgB2 by nano-SiC and its potential for the improvement of flux pinning were studied for MgB22x(SiC)x/2 with x50, 0.2, and 0.3 and for 10 wt % nano-SiC-doped MgB2 samples. Cosubstitution of B by Si and C counterbalanced the effects of single-element doping, decreasing Tc by only 1.5 K, introducing intragrain pinning centers effective at high fields(More)
A comparative study of pure, SiC, and C doped MgB2 wires has revealed that the SiC doping allowed C substitution and MgB2 formation to take place simultaneously at low temperatures. C substitution enhances H_{c2}, while the defects, small grain size, and nanoinclusions induced by C incorporation and low-temperature processing are responsible for the(More)
Two-dimensional (2D) transition metal oxide systems present exotic electronic properties and high specific surface areas, and also demonstrate promising applications ranging from electronics to energy storage. Yet, in contrast to other types of nanostructures, the question as to whether we could assemble 2D nanomaterials with an atomic thickness from(More)
Much smoother surfaces and significantly improved superconducting properties of relatively thick YBa2Cu3O7 YBCO films have been achieved by introducing a multilayered structure with alternating main YBCO and additional NdBCO layers. The surface of thick 1 m multilayers has almost no holes compared to YBCO films. Critical current density Jc has been(More)
A core-shell structured Si nanoparticles@TiO2-x/C mesoporous microfiber composite has been synthesized by an electrospinning method. The core-shell composite exhibits high reversible capacity, excellent rate capability, and improved cycle performance as an anode material for Li-ion batteries. Furthermore, it shows remarkable suppression of exothermic(More)
Sodium ion battery is a promising electrical energy storage system for sustainable energy storage applications due to the abundance of sodium resources and their low cost. In this communication, the electrochemical properties of sodium ion storage in reduced graphene oxide (RGO) were studied in an electrolyte consisting of 1 M NaClO4 in propylene carbonate(More)
The influences of microstructure, connectivity, and disorder on the critical current density, <i>J</i><sub>c</sub>, are discussed to clarify the different mechanisms of <i>Jc</i>(<i>H</i>) in different magnetic field ranges for in-situ and combined in-situ/ex-situ MgB<sub>2</sub>/Fe wires. Sintering temperature plays a very important role in the(More)
*Correspondence: Hua Kun Liu and Konstantin Konstantinov , Institute for Superconducting and Electronic Materials, University of Wollongong, AIIM Facility, Innovation Campus, North Wollongong, NSW 2522, Australia e-mail: hua@uow.edu.au; konstan@uow.edu.au Binder-free self-assembled 3D architecture electrodes have been fabricated by a novel convenient(More)
ZnO is a promising high figure-of-merit (ZT) thermoelectric material for power harvesting from heat due to its high melting point, high electrical conductivity σ, and Seebeck coefficient α, but its practical use is limited by a high lattice thermal conductivity κ(L). Here, we report Al-containing ZnO nanocomposites with up to a factor of 20 lower κ(L) than(More)
Silicene monolayers grown on Ag(111) surfaces demonstrate a band gap that is tunable by oxygen adatoms from semimetallic to semiconducting type. With the use of low-temperature scanning tunneling microscopy, we find that the adsorption configurations and amounts of oxygen adatoms on the silicene surface are critical for band gap engineering, which is(More)