Materials Literature
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At sufficiently high temperatures, the center-of-mass microscopic diffusion dynamics of liquids is characterized by a single component, often with weak temperature dependence. In this regime, the effective cage made by the neighbor particles cannot be sustained and readily breaks down, enabling long-range diffusion. A…
The carrier dynamics and recombination characteristics of vertically aligned silicon nanowires are investigated using terahertz emission and photoluminescence spectroscopy, respectively. It is observed that the presence of pores on the walls in two-step-synthesized silicon nanowires greatly affects the carrier dynamic…
The physicochemical properties and biomedical applications of Fe3O4 microspheres are strongly dependent on their size. Herein we report a new approach to tune the size of carboxyl-functionalized Fe3O4 microspheres via a polyol process. The diameter of Fe3O4 microspheres can be tuned in the range of 300–900 nm by simpl…
We revisit the electrodynamics of resonant high-Q interactions in atomic systems with a view to gaining insights into the design of meta-atoms and hence bulk metamaterials with profoundly different electromagnetic responses. The relevance of phase coherence and nonlinearity in charged systems is emphasized, as is the…
Abstract A simple and sensitive method for simultaneously measuring dopamine (DA), ascorbic acid (AA), and uric acid (UA) using a poly(1‐aminoanthracene) and carbon nanotubes nanocomposite electrode is presented. The experimental parameters for composite film synthesis as well as the variables related to simultaneous…
The electronic structure and stability of Cu(111)-hosted Pt overlayers with and without the presence of atomic oxygen have been studied by means of core-level spectroscopy and density functional theory (DFT). Because of lattice mismatch, Pt(111) overlayers grown on Cu(111) are compressively strained, and hard X-ray ph…
A core-resonance cylindrical whispering gallery mode (WGM) laser is reported in dye-doped nematic liquid crystals (NLCs) filled in a glass capillary. This laser runs on the basis of the properties that NLC has an extraordinary refractive index much higher than that of a glass and that it plays as a good solvent for la…
In this paper, we report on the spectral dependence of Δn=no−ne for CdGa2S4 single crystals for shorter and longer wavelengths than the isotropic wavelength λ0=485.7 nm (300 K). It was established that Δn is positive at λ>λ0 and it is negative in the spectral range λ<λ0. The isotropic wavelength λ0 exhibits blue spect…
In this paper we propose a crystalline motion of spiral-shaped polygonal curves with a tip motion as a simple model of a step motion on a crystal surface under screw dislocation. We give a tip motion anddiscuss the behavior of the solution curves by crystalline curvatureflow with a driving force. We show that the solu…
Intrinsic kinetics of HCl oxidation over a Cu/Ce composite oxide catalyst have been studied using an integral tubular reactor. The kinetic data were measured after elimination of the influence of external and internal diffusion at 390–420 °C, with n HCl / n O 2 ranging from 1 to 4 and W / F A0 ranging from 50 to 350 g…
Abstract A green chemistry method to nano‐roughen a Pt disk microelectrode has been successfully developed via electrochemical alloying‐dealloying in an ionic liquid bath comprising of ZnCl2 and 1‐ethyl‐3‐methylimidazolium chloride. The nano‐roughened Pt layer possesses bark‐like nanoporous structures characteristic o…
We study sequential tunneling of magnetic excitations in nonitinerant systems through triangular molecular magnets. It is known that the quantum state of these molecular magnets can be controlled by application of an electric or a magnetic field. Here, we use this fact to control the flow of a pure magnetization curre…
The radical copolymerization of N‐substituted maleimides containing polymethylene and poly(ethylene oxide) side chains as the N‐substituent groups with isobutene, styrene, and α‐methylstyrene as the electron‐donating monomers is carried out in order to investigate the structure and thermal properties of the resulting…
Here we report on the synthesis, characterization, and photophysics of multichromophoric arrays based on a triptycene scaffold that acts as a bridging ligand for Ir(III) and Os(II) satellite active components. The triptycene scaffold not only furnishes a rigid star-shaped 3D displacement of the metallic units in space…
Magnetization of DyFe${}_{4}$Ge${}_{2}$ measured as function of temperature in a 1 kOe magnetic field indicates antiferromagnetic (AFM) ordering at ${T}_{\mathrm{N}}$ $=$ 62 K followed by two spin reorientation transitions at ${T}_{f}$${}_{1}$ $=$ 52 and ${T}_{f}$${}_{2}$ $=$ 32 K and one unusual anomaly at 15 K (${T}…
The o-hydroxycinnamic derivatives represent efficient caged compounds that can realize quantification of delivery upon uncaging, but there has been lack of time-resolved and mechanistic studies. We used time-resolved infrared (TRIR) spectroscopy to investigate the photochemical uncaging dynamics of the prototype o-hyd…
We observed the high-speed anisotropic motion of an individual gold nanoparticle in 3D at the picometer scale using a high-energy electron probe. Diffracted electron tracking (DET) using the electron back-scattered diffraction (EBSD) patterns of labeled nanoparticles under wet-SEM allowed us to super-accurately measur…
The interface effects on the ferroelectric polarization and stability of PbTiO3 (PTO) films with metallic (Pt) or oxide (LaNiO3, SrRuO3) electrodes were studied using density functional theory calculation. It was found that the PTO film with oxide electrodes has stronger electrode/ferroelectric interface adhesion, low…
We describe a systematic study of triplet sensitization in a poly(phenyleneethynylene) conjugated polyelectrolyte (CPE) in methanol solution by using a series of three cationic iridium complexes with varying triplet energy. The cationic iridium complexes bind to the anionic CPE by ion-pairing, leading to singlet state…
New C60 and C70 fullerene dyads formed with 4-amino-1,8-naphthalimide chromophores have been prepared by the Bingel cyclopropanation reaction. The resulting monoadducts were investigated with respect to their fluorescence properties (quantum yields and lifetimes) to unravel the role of the charge-transfer naphthalimid…