Materials Literature
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Twin-bowl-shaped tris(spiroorthocarbonate) cyclophanes were designed and prepared as ditopic hosts for electrically neutral or electron-rich guests. Preparation of the desired cyclophanes was achieved by cyclotrimerization of 2,2',3,3'-tetrahydroxy-1,1'-binaphthyl (THB) via the transesterification of tetraphenyl ortho…
Abstract The optical, chemical, and catalytic properties of metallic nanoparticles (NPs) depend strongly on their particle size and shape. Therefore, the preparation of monodisperse metallic NPs is very important for fundamental studies and practical applications. However, the isolation of the different structures by…
Both Ti \(L\) and Kβ resonant x-ray emission spectra (RXES) of SrTiO3 were measured at low temperature, \(T\leq 40\) K. Regardless of the \(d^{0}\)-ness of a Ti4+ ion, a \(dd\) excitation peak in Ti \(L\) RXES is irreversibly created by UV irradiation, directly indicating a mixture of the \(d^{1}L\) electronic configu…
This work focused on the synthesis of a series of poly(arylene ether ketone) random copolymers with various controlled pendant carboxylic acid groups (PEAK-COOH) by direct copolymerization method and the preparation of antifouling ultrafiltration membranes via the conventional immersion precipitation phase inversion m…
Manganese deposited on the N-polar face of wurtzite gallium nitride [GaN (000$\overline{1}$)] results in two unique surface reconstructions, depending on the deposition temperature. At lower temperature (less than 105${\phantom{\rule{0.16em}{0ex}}}^{\ensuremath{\circ}}$C), it is found that a metastable $3\ifmmode\time…
Abstract In this study, magnetic polymeric nanoparticles were prepared use in for targeted drug delivery. First, iron oxide (Fe3O4) magnetic nanoparticles (MNPs) were synthesized by coprecipitation with ferrous and ferric chloride salts. Then, to render the MNPs hydrophobic, the surfaces were covered with oleic acid.…
We demonstrate an erbium-doped fiber laser passively mode-locked by few layers of graphene prepared by the mechanical exfoliation of the high oriented pyrolytic graphite through the Scotch-tape method. This all-fiber ring cavity delivered a pulse train with a repetition rate of 1.646 MHz and pulse duration of 1.656 ps…
A material whose electrons are correlated can affect electron dynamics across the interface with another material. Such a ``proximity effect'' can have several manifestations, from order parameter leakage to generated effective interactions. The resulting combination of induced electron correlations and their intrinsi…
Effects of cutting direction with respect to grain angle, rake angle, and depth of cut on cutting forces and surface quality during machining of balsam fir were evaluated. These factors were analyzed within a perspective of their application to a chipper-canter machining process. Balsam fir is one of the most importan…
A spin-density-wave (SDW) for $(\mathrm{TMTSF})_{2}\mathrm{PF}_{6}$ has been reported to appear below ${T}_{\mathrm{SDW}}$ ($\ensuremath{\simeq}12\text{ }\text{ }\mathrm{K}$), with a subphase transition at ${T}^{*}$ ($\ensuremath{\simeq}4\text{ }\text{ }\mathrm{K}$). To determine the structure of the subphase, we synt…
The [17.8]0(+)-X(1)Σ(+) (0,0) band of gold monofluoride, AuF, has been recorded at a resolution of 40 MHz both field free and in the presence of a static electric and magnetic field. The observed Stark shifts were analyzed to determine the permanent electric dipole moment, μel, of 2.03 ± 0.05 D and 4.13 ± 0.02 D, for…
The electronic and optical properties of indium zinc tin oxide (IZTO) thin films grown under different gas environments were investigated by means of x-ray photoelectron spectroscopy and reflection electron energy loss spectroscopy (REELS). REELS spectra revealed that IZTO thin films under argon mixed with oxygen had…
The optical properties of thin films of the heavy-fermion compound CeCoIn5, which were deposited by molecular beam epitaxy onto MgF2 substrates, have been studied at frequencies 7 to 45 cm^{-1} (corresponding to 0.2 to 1.3 THz) and temperatures 2 to 300 K. We observe an electrodynamic behavior which is typical for hea…
Influence of Isoelectronic Te Doping on the Physical Properties of ZnO Films Grown by Molecular-Beam Epitaxy, Park, Seung-Hwan, Minegishi, Tsutomu, Oh, Dong-Cheol, Kim, Dong-Jin, Chang, Ji-Ho, Yao, Takafumi, Taishi, Toshinori, Yonenaga, Ichiro
In contrast to the rich oxygen nonstoichiometry in vanadium oxides, we report here an interesting Bi4V2O(11-δ) oxide system whose vanadate layer allows only a narrow oxygen deficiency range. Beyond δ = 0.4, reduction of Bi4V2O(11-δ) does not proceed in the V-O layer, but instead suddenly switches to the Bi-O layer by…
We elucidate the dominant physical mechanisms for enhanced light absorption in thin film solar cells with embedded dielectric nanoparticles and conformal surface texturing. A prior work reported enhancement in short-circuit current for such a structure and attributed this gain to increased photon absorption due to Mie…
The fact that the photoluminescence properties of quantum dots are always strongly influenced by the environment limits the scope of further progress in the field of QD’ bio-applications. In this paper, the effects of immunoglobulin G (IgG) on the photoluminescence properties and stability of water-soluble CdSe/ZnS co…
In this article, we describe a simple method to reversibly tune the wetting properties of vertically aligned carbon nanotube (CNT) arrays. Here, CNT arrays are defined as densely packed multi-walled carbon nanotubes oriented perpendicular to the growth substrate as a result of a growth process by the standard thermal…
The crystallization behavior and the orientation of linear alkane hentetracontane (C41) confined in cylindrical nanoporous alumina templates with different surface energies were investigated by nonisothermal crystallization and X-ray diffraction. The surface of pristine nanoporous alumina was modified to have low surf…
This work aims to study squeeze flows when the lubrication approximation does not necessarily hold. Strong squeeze flows are defined as the cases in which a sample is compressed by a disk with the initial speed of 40 cm/s, whereas weak squeeze flows are realized when the disk is softly released manually to avoid any i…