Materials Literature
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It is considered that, after a water drop contacts the base of a roughness groove, water should immediately fill this roughness groove. Subsequently, Cassie-Baxter wetting state is transited to that of Wenzel. Accordingly, one of the criteria used to judge the transition from Cassie-Baxter to Wenzel states is whether…
Young's and shear moduli and Poisson's ratio of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ ( LSCF 6428), La 0.6 Sr 0.4 Co O 3−δ ( LSC ), and La 0.6 Sr 0.4 FeO 3−δ ( LSF ) were investigated in the temperature range from room temperature to 1173 K and in the oxygen partial pressure, P ( O 2 ), range from 1 × 10 −1 to 1 × 10 −4 b…
We report a simple chemical vapor deposition method to fabricate Cu-doped ZnO hemispherical shell structures with room-temperature ferromagnetism (RTFM). Through a series of controlled experiments by changing the growth temperature and reaction time, we observe the evolution of product morphology from whole spherical…
In this paper, we have quantitatively evaluated the effective surface conductivity of chemical vapor deposition-grown graphene through a full-wave electromagnetic method and also investigated the intrinsic characteristics of the transmission line (TL) of the graphene at frequency ranging from 0.5 to 40 GHz. According…
We fabricate nanosized superconducting YBa(2)Cu(3)O(7-δ) (Y-123) and nonsuperconducting Y(2)BaCuO(5) (Y-211) powders using carbon nanotubes as template. The mean particle size of Y-123 and Y-211 is 12 and 30 nm, respectively. The superconducting transition temperature of the Y-123 nanopowder is 90.9 K, similar to that…
The term hormesis describes a dose-response relationship that is characterized by a response that is opposite above and below the toxicological or pharmacological threshold. Previous reports have shown that this relationship is ubiquitous in the response of pharmaceuticals, metals, organic chemicals, radiation, and ph…
In the present article, we have developed a facile and rapid method to fabricate a polyelectrolyte multilayer under high gravity field and investigated the difference of mass transfer in the diffusing process between LbL self-assembled technique under high gravity field (HG-LbL) and dipping assembly. Herein, we have e…
The electrocaloric effect in the blends of poly(vinylidene fluoride–trifluoroethylene–chlorofluoroethylene) (P(VDF-TrFE-CFE)) with small amount of poly(vinylidene fluoride–trifluoroethylene) (P(VDF-TrFE)) is investigated. It was found that small amount of P(VDF-TrFE) (∼10 wt. %) can cause a more than 10% increase in t…
Donor‐doped PbZr 0.52 Ti 0.48 O 3 ( PZT ) films were utilized to study the effect of dopants on the mobility of ferroelectric domain walls. For chemical solution deposited PZT films 2 μm in thickness, doped with 1%–4% Nb or La , the low field dielectric permittivity remained between 1100 and 1300. With increasing Nb c…
In this paper, PbS semiconductor quantum dots (QDs) with near-infrared (NIR) photoluminescence were synthesized in oleic acid and paraffin liquid mixture by using an easily handled and 'green' approach. Surface functionalization of the QDs was accomplished with a silica and polyethylene glycol (PEG) phospholipid dual-…
We report the magnetic and magnetocaloric properties of Dy1−xHoxMnO3 (0 ≤ x ≤ 1). Large entropy change of 12.5 J/kg K and refrigeration capacity of 312 J/kg at 7 T for HoMnO3 is calculated based on isothermal magnetization measurements. The peak temperature of magnetic entropy change for all samples keeps the same 10.…
The strong interest in nanostructured functional materials has motivated the scalable production of high quality mesoporous silicas and carbonaceous materials. Although many approaches have been explored for this goal, it is highly desired and still remains a challenge to develop a straightforward strategy for simple…
Previous studies have demonstrated the capability of superhydrophobic surfaces to produce slip flow and drag reduction, which properties hold considerable promise for a broad range of applications. However, in order to implement such surfaces for practical utilizations, environmental factors such as water movement ove…
There is a vast array of materials with diverse mechanical, physical and chemical properties from which the design engineer has to choose the most suitable material satisfying different design requirements. The design engineer has to take into account also a large number of material selection criteria before arriving…
In this study, Al ‐doped ZnO particles are infiltrated into porous ZrSiO 4 substrates to form an Al ‐doped ZnO / ZrSiO 4 composite ceramic using sol‐gel process. The doping of aluminum results in the high‐concentration carriers, leading to the improvement of polarization capability and electric conductivity. When the…
Silver nanoparticles are notoriously susceptible to oxidation, yet gold nanoparticles coated in silver exhibit a unique electronic interaction that occurs at the interface of the two metals, leading to enhanced stability properties for the silver shell. In order to probe the phenomenon, the stability of gold nanoparti…
The stability and electronic structure of (protonated) polyaniline (PANI) and PANI–graphene composite are systematically studied using density-functional simulations. The protonation of PANI is a spontaneous exothermic reaction. It decreases the band gap of PANI and introduces shallow impurity states (ISs), both of wh…
We study metamaterials with an anisotropic permittivity tensor in which one component is near zero. We find that such an anisotropic metamaterial can be used to control wave propagation and construct almost perfect bending waveguides with a high transmission rate (>95%). This interesting effect originates in th…
Structural, magnetic and magnetocaloric properties of Fe2P-based Mn-Fe-P-Si compounds were investigated. The study reveals a large magneto-elastic coupling that starts to develop in the paramagnetic state and grows when the ferromagnetic transition temperature is approached. Based on the behavior of the magneto-elasti…
Electronic structure calculations are used to analyze the electronic and magnetic properties in {K$_{2}$Fe$_{4+x}$Se$_{5}$}. Fe atoms can be divided into two distinct groups. The $x{=}0$ (parent) compound forms an insulating, collinear, local moment phase with high N{é}el temperature. We show that large biquadratic ex…