Materials Literature
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Superhydrophobic nano-flower surfaces were fabricated using MEMS technology and microwave plasma-enhanced chemical vapor deposition (MPCVD) of carbon nanotubes on silicon micro-post array surfaces. The nano-flower structures can be readily formed within 1–2 min on the micro-post arrays with the spacing ranging from 25…
We propose a design of a periodically perforated thin plate leading to omni-directivity and confinement of bending waves via ultra-refraction. We first analyze the band spectrum of the bi-harmonic operator for an array of freely vibrating square voids arranged in a checkerboard fashion using finite elements: the spect…
AIM: The ultrasonically induced effect of a tumor accumulative derivative of rose bengal (RB) on isolated tumor cells was investigated to clarify whether the RB derivative (RBD) maintains the sonosensitizing ability of RB. MATERIALS AND METHODS: Sarcoma 180 cells were suspended in air-saturated phosphate-buffered sali…
Ultrasmall superparamagnetic iron oxide nanoparticles (USPIONs) are currently under development for the intracellular delivery of therapeutics. However, the mechanisms of cellular uptake and the cellular reaction to this uptake, independent of therapeutics, are not well defined. The interactions of biocompatible catio…
Doping with 3d transition metals, particularly Mn, is thought to play an important role in determining the reliability of dielectrics used in multi-layer ceramic capacitors (MLCCs). However, a detailed examination of the electronic structure, solution energies and compensation mechanisms of these systems is lacking. I…
Abstract In this study, we reported a smart temperature‐sensitive drug release system based on titanium nanotubes. Titanium nanotubes were fabricated with an electrochemical approach. The 3‐trimethoxysilyl propylmethacrylate (MPS) was initially coupling to the surfaces of titanium nanotubes, and then polymerizing with…
We report the successful growth of high-quality single crystals of LiFeAs with lateral sizes up to 5 × 5 mm 2 by the Sn-flux method. Electrical resistivity studies reveal that the superconducting onset temperature is 18.2 K with a transition width less than 1.1 K and the ratio of room temperature to residual resistivi…
Passive metamaterials suffer from narrow bandwidths and high losses due to limits imposed by causality. Actively loaded metamaterials on the other hand may be designed to overcome these limitations, with the caveat that stability may be difficult to ensure. In this letter, loops with active non-Foster loads, in which…
We investigate the key reliability limiting factors of bilayer graphene (BLG) under current stressing by examining the breakdown characteristics of BLG with chemical-mechanical planarization copper contacts. It is observed that dc current-induced thermal annealing helps to reduce the BLG-to-Cu contact resistance. Brea…
Sexual behaviour, pattern of auxosporulation, and breeding system of the araphid diatom Tabularia fasciculata were studied using 64 clones derived from two natural populations from the Canadian Atlantic seashore and the Black Sea. Both inter- and intraclonal reproductions were observed. Heterothallic reproduction was…
The high-power piezoelectric characteristics of lead-free piezoelectric ceramics based on a mixed bismuth layer-structured ferroelectric, Bi4Ti3O12–SrBi4Ti4O15 (abbreviated as BIT–SBTi) were studied. In addition, MnCO3-doped BIT–SBTi (abbreviated as BIT–SBTi + Mn x wt %) were prepared to improve their high-power piezo…
Cation-doped BiFeO3 ceramics were fabricated by sintering coprecipitated and calcined powders at 700–900 °C to study the effect of cation doping on the leakage current properties of the sintered samples. Among the dopants examined in this study, Ti4+, Sn4+, or Zr4+ doping was found to effectively reduce the leakage cu…
We present a study of the magnetocaloric effect in La5/8-y Pry Ca3/8 MnO3 (y=0.3) and Pr0.5 Ca0.09Sr0.41 MnO3 manganites. The low temperature state of both systems is the result of a competition between the antiferromagnetic and ferromagnetic phases. The samples display magnetocaloric effect evidenced in an adiabatic…
We present the design and the main characteristics of the CMR-B-scalar sensor based on polycrystalline La0.83Sr0.17MnO3films. The sensor active volume is only 400 μm × 50 μm × 0.4 μm, and it is able to measure a magnetic induction of up to 40 T independently on its direction. The investigations of the influence of fil…
Lead-free piezoelectric (K,Na)(Nb,Ta)O3 thin films were prepared by chemical solution deposition. Perovskite single-phase (K0.5Na0.5)(Nb0.8Ta0.2)O3 and Mn-doped (K0.5Na0.5)(Nb0.8Ta0.2)O3 thin films were successfully fabricated at 600 °C on Pt/TiO x /SiO2/Si substrates by controlling the excess amounts of K and Na, and…
The thermal stability, alignment and electro-optic properties of liquid crystals can be fundamentally altered by dispersing small amounts of solid nanoparticles in a liquid crystal host. In the present study, the local alignment of the liquid crystal in such dispersions is studied by means of polarising optical micros…
A liquid in Cassie-Baxter state above a structured superhydrophobic surface is ideally suited for surface driven transport due to its large free surface fraction in close contact to a solid. We investigate thermal Marangoni flow over a superhydrophobic array of fins oriented parallel or perpendicular to an applied tem…
Textured (Bi1/2K1/2)TiO3 (BKT) ceramics were prepared by a reactive templated grain growth (RTGG) method to improve their piezoelectric properties. Also, a hot-pressing (HP) method was modified on the basis of RTGG method to obtain dense ceramics and promote the grain orientation. The textured BKT ceramics prepared by…
Lanthanide nanomaterials are considered a less toxic alternative to quantum dots for bioimaging applications. This study evaluated the cytotoxicity of terbium (Tb)-doped gadolinium oxide (Gd(2)O(3)) and dysprosium oxide (Dy(2)O(3)) nanoparticles exposed to human (BEAS-2B) and mouse (L929) cell lines at a concentration…
This paper reports on a theoretical and experimental investigation of the behavior of the electrical and thermal conductivities of a nanostructured material based on Bi x Sb2 − x Te3 solid solutions. The effect of boundary scattering has been taken into account by introducing the scattering mechanism with a constant m…