Materials Literature
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We study three regimes of the Mott transitions characterized by classical, marginally quantum, and quantum. In the classical regime, the quantum degeneracy temperature is lower than the critical temperature of the Mott transition ${T}_{c}$, below which the first-order transition occurs. The quantum regime describes th…
The definition of the fundamental quantity, the chemical potential, is badly confused in the literature: there are at least three distinct definitions in various books and papers. While they all give the same result in the thermodynamic limit, major differences between them can occur for finite systems, in anomalous c…
We have used density-functional theory to investigate (111), (110), (210), (211), (100), and (310) surfaces of ceria (CeO2). Compared with previous interatomic-potential-based studies, our calculations reported a slightly different relative stability ordering and significantly lower surface energies for the stoichiome…
We investigate the magnetic resonance of split-ring resonators (SRR) experimentally and numerically. The dependence of the geometrical parameters on the magnetic resonance frequency of SRR is studied. We further investigate the effect of lumped capacitors integrated to the SRR on the magnetic resonance frequency for t…
Biological systems are known to be highly transparent to 700- to 1,100-nm near-infrared (NIR) light. It is shown here that the strong optical absorbance of single-walled carbon nanotubes (SWNTs) in this special spectral window, an intrinsic property of SWNTs, can be used for optical stimulation of nanotubes inside liv…
Radiation damage prevents the ability to obtain images from individual molecules. We suggest that this problem can be avoided for organic molecules by placing them in close proximity with a metallic surface. The molecules will then quickly dissipate any electronic excitation via their coupling to the metal surface. Th…
Kinetics of metastable systems modeled by Hamiltonians containing nonlocal and nonconservative terms is reproduced by the Fokker-Planck and imaginary time Schrodinger equation scheme with subsequent symplectic integration. Example solutions for ergodicity breaking in ferroelectrics reassure the H-theorem of global sta…
Abstract New organogelator, N,N′-bis(3,4,5-tridodecyloxy)benzoylurea (1), gelled organic liquid such as alcohol, hydrocabons, ethyl acetate, salad oil, terpenes, and essential and perfume oil at low concentration of gelator. The terpene and perfume gels show good release of the volatile components for a long time.
Abstract New green-emitting Gd2O2CO3:xTb3+ fine particles were synthesized by a flux method using the 0.476Li2CO3–0.270Na2CO3–0.254K2CO3 eutectic mixture. The emission intensity of the Gd2O2CO3:16.9 atom %Tb3+ phosphor was equivalent to that of the commercial LaPO4:Ce3+,Tb3+, in spite that the size was apparently smal…
Bismuth (Bi) nanowires are interesting one-dimensional systems due to the significant quantum confinement effects exhibited as a function of the wire diameters, and synthesizing Bi nanowires with sizes below 20 nm is of fundamental importance in understanding quantum effects. Here, we report a bulk synthesis method to…
The crystal structure of hydrochlorothiazide form II, C7H8ClN3O4S2, was solved by simulated annealing from laboratory X-ray powder diffraction data collected at room temperature to 1.76 Å resolution. Subsequent Rietveld refinement yielded an Rwp of 0.0376 to 1.49 Å resolution. The molecules crystallize in the space…
Abstract The luminescence properties of tris(2,2′-bipyridine) ruthenium complex (Ru(bpy)32+) incorporated into polymer Langmuir–Blodgett (LB) films (polymer nanosheets) excited by localized surface plasmon on metal nanoparticles are described. It was clearly demonstrated that the luminescence intensity of Ru(bpy)32+ w…
MCM-48 was surface modified via vapor-phase reactions with hexamethyldisilazane (CH(3)-MCM-48) and 3-aminopropyldimethylethoxysilane (NH(2)-MCM-48). (29)Si NMR confirmed that the resulting materials contained covalently attached trimethylsilane and 3-aminopropyldimethylsilane moieties, both important functionalities f…
We discuss the minimum size of ice nanoparticles in water-rich glycerol-water mixtures, as studied by broadband dielectric spectroscopy (BDS) in the frequency range from 1 Hz to 250 MHz and differential scanning calorimetry (DSC) at the temperature interval from 138 to 313 K. It is known that the extra water which is…
The design, synthesis, and electropolymerization of sterically hindered pyrrole derivatives are described. Endo and exo adducts of cyclopentadiene and N -phenylmaleimide were converted to give bicyclo[2.2.1]heptane-fused pyrrole monomers, in which a phenyl group is rigidly placed proximate the pyrrole fragment. Oxidat…
Abstract Ultrathin, single-crystalline gold nanosheets with thickness of ca. 10 nm are successfully obtained in water by photoreduction of Au(OH)4− ions at the surface of ionic liquid (IL) μ-droplets. The nanosheets produced at the interface are spontaneously extracted into the ionic liquid phase, which effectively pr…
We study the capillary forces arising from charged colloidal particles trapped at an oil-water interface. Since it is quadratic in the electric field, the electric stress acting on the interface cannot be written as the superposition of one-particle terms. Indeed, we find that the interfacial pressure is dominated by…
Segmental dynamics are measured in pure polyisobutylene (PIB), pure deuterium-labeled head-to-head poly(propylene) (hhPP), and a blend containing 70% PIB/30% hhPP by mass using 13 C spin−lattice relaxation, 2 H spin−lattice relaxation, and dielectric spectroscopy (DS). The NMR measurements are made between 313 K and 4…
A new type of chiral receptor (R,R)- or (S,S)-1b with C(2) symmetry was synthesized. An induced-fit type of binding behavior of 1b for diamines was revealed by CD spectroscopy. NMR studies demonstrated that 1b can function as a highly sensitive chiral shift reagent for the determination of the enantiomeric purity of c…
DFT and post Hartree-Fock calculations were carried out to characterize the electronic structure of the 10-electron-reduced [PMo8V4O40(VO)4](5)(-) polyoxometalate. This molecule may be viewed as a mixed-metal PMo8V4O40 Keggin structure capped with four VO units, in which the eight vanadiums form a ring. In mixed V/Mo…