Materials Literature
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In this paper, we will present and discuss our results on the thermal interface resistances of the thermal interface materials based on vertically aligned carbon nanotubes. In this system, the total interface resistance is the sum of thermal resistances created by the contact between the growth surface and the CNTs, t…
The solvent vapor treatment (SVT) for poly(3-hexylthiophene) (PAT6) films and its application to interpenetrating heterojunction organic solar cells have been studied. It was found that SVT could improve the crystallinity and electrical characteristics of the PAT6 films. We fabricated organic solar cells with an inter…
The sulfate and Al3+ in ettringite (Ca6Al2(SO4)3(OH)12 · 26H2O) can substitute for other oxyanions such as chromate ions (CrO42−) and cations such as Cr3+, respectively. Ettringite synthesis in the presence of CrO42− or Cr3+ was attempted by adding solid Ca(OH)2 to an Al2(SO4)3 solution to examine the behavior of thes…
We investigate the effect of the arsenic source (As2 and As4) on the optical properties of InGaAs quantum rods (QRs) grown by molecular beam epitaxy. Owing to differences in the In and Ga diffusion lengths under As2 and As4 fluxes, photoluminescence (PL) peak energies of the QR samples depend strongly on the As source…
We report the structural instability of TiO2 nanotubes subjected to treatment with ammonium hydroxide (NH4OH) solution prior to calcination at elevated temperatures. The nanotubes were disintegrated into nanoparticles and the tubular morphology was vanished after 2 h of calcination at 500 °C. High-resolution transmiss…
Herein, we report the first incorporation of 8-hydroxyquinoline ions into hetero- and homometallic one dimensional complexes [FeIIMnII(8-quinolinato)4·(H2O)0.25]n (1) and [MnII(8-quinolinato)2]n (2). Magnetic analyses of both complexes indicate antiferromagnetic interactions between the magnetic centers.
We demonstrated that transmittance and field intensities of a thick metal sandwiched between two dielectric photonic crystals (PCs) can be enhanced by more than two orders of magnitude and by nearly 20 times, respectively, compared to a single metal layer with the same thickness. Under the tunneling mechanism, the lig…
It has recently been found that the exchange bias of a MnIr/CoFe system can be increased significantly by adding a thermal treatment to the bilayer. To reveal the origin of the higher exchange bias, we performed polarized neutron reflectivity measurements at the JRR-3 neutron source. The magnetization vector near the…
High quality single-crystals of the A-site and oxygen vacancy ordered variant of yttrium-doped strontium cobaltates Y1−xSrxCoO3−δ (0.7 ≤ x ≤ 0.95) have been produced via the floating zone technique. These materials have been the subject of recent research because of their potential applications in solid state devices…
The variable stripe-length method is considered a powerful yet easily implemented approach to measure the optical material gain of a semiconductor sample. However, the results obtained with this method are not as straightforward to interpret as originally suggested. Here, we discuss the general validity of the method…
The structural optimization of highly mesoporous silica thin film templated with Brij58 is reported in this paper. The best conditions for obtaining well organized films are studied as a function of the concentration of surfactant, the relative humidity (RH) and the aging time of the solutions used in the dip-coating…
For a long time, adipose tissue was only considered for its crucial role in energy balance and associated diseases. The discovery of the presence of immature cells highlights a putative role for these tissues as reservoirs of therapeutic cells. Indeed, since fat pads can be sampled by liposuction under local anesthesi…
Proton-donor ability of carboxylic groups incorporated by co-condensation into SBA-15 and ethane-bridged periodic mesoporous organosilica (PMO) has been studied through IR spectroscopy by dosing ammonia, which forms reversibly COO(-) groups and NH(4)(+) ions. The related equilibrium constants, determined by elaboratio…
Abstract Surface graphitization of 4H‐SiC (0001) at high temperature up to 2100 °C in ultra high vacuum (UHV) was observed for the first time in this study. From precisely controlled SiC step‐terrace surfaces, uniform graphitized surface morphologies with large terraces appeared at anneal temperatures above 2000 °C. A…
UNLABELLED: Extravasation of therapeutic (90)Y-ibritumomab tiuxetan can cause significant injury. Detection of extravasated (90)Y using a γ-camera for patients undergoing (90)Y-ibritumomab tiuxetan therapy is a challenge because of the inherently low efficiency of bremsstrahlung imaging and the interference of prompt…
The responses of the electrical and optical characteristics of an organic light-emitting device (OLED) with fac-tris(2-phenylpyridinato-N, C2′) iridium (III) [Ir(ppy)3] doped in a polymer matrix to compressive stresses were studied. The OLED converted stresses as low as 6.8 kPa into measurable and reversible changes i…
For the first time, sol–gel derived metal fluorides (MgF2, AlF3 and CaF2) were used in the preparation of three-dimensionally ordered macroporous solids with complex pore structures (macro-, meso- and micropores). These metal fluorides exhibit surface areas larger than 300 m2 g−1 and show medium to strong Lewis acidit…
Abstract We studied the ferromagnetic phase transition and the resultant change in the optical band gap of GdN thin films grown by a reactive sputtering technique in an ultra‐high vacuum process. The GdN thin film exhibited two phases of spin ordering; the short correlation of spins starts to develop below ∼60 K, and…
We explore the excitation profile of a repulsive impurity doped quantum dot. The quantum dot is subject to a discontinuously reversing static electric field. The dopant impurity potential chosen assumes Gaussian form. The investigation reveals how impurity strength and impurity domain can influence the excitation rate…
Recently, light-induced domain reversal has been developed to a promising method for domain engineering, but the depth of reversed domain is only of several tens of microns, which greatly limits its practical applications. In this Letter, we fabricated domain patterns on the –z face of 1.0 mol % Mg doped near-stoichio…