Materials Literature
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We demonstrate a universal approach to the synthesis of nanoporous materials with pore structures that are highly precise replications of bicontinuous microemulsions. The materials can be formed at both low and high temperature and have three-dimensionally continuous pore networks and pore sizes on the order of 100 nm.
The respective contributions of the charge carrier concentration and mobility to the ionic conductivity in glasses remain an open question. In the present work we calculate these two parameters from conductivity data as a function of temperature below and above the glass transition temperature, T(g). The basic hypothe…
Two new members of the Mn(12) family of single-molecule magnets (SMMs), [Mn(12)O(12)(O(2)CCH(2)Bu(t))(16)(Bu(t)OH)(H(2)O)(3)].2Bu(t)OH (3.2Bu(t)OH) and [Mn(12)O(12)(O(2)CCH(2)Bu(t))(16)(C(5)H(11)OH)(4)] (4) (C(5)H(11)OH is 1-pentanol), are reported. They were synthesized from [Mn(12)O(12)(O(2)CMe)(16)(H(2)O)(4)].2MeCO…
Abstract Herein we report a series of [Ln L (H 2 O)]Cl 3 complexes, in which L is a 1,4,7,10‐tetrazacyclododecane framework (cyclen) functionalized with 2‐methylpyridyl pendants on the nitrogen atoms at the 1‐ and 7‐positions and with N ‐[2‐(2‐hydroxyethoxy)ethyl]acetamide groups on those at the 4‐ and 10‐positions, a…
We have developed a hybrid chemical solution method for preparing nanocomposite thin films composed of a ferroelectric Bi(3.6)Eu(0.4)Ti(3)O(12) (BEuT) matrix and highly c-axis-oriented ZnO nanorods on Si substrates. First, a seed-layer solution growth approach was used to prepare the highly c-axis-oriented ZnO nanorod…
Magneto-inductive cables for low (ca 100 MHz) radio frequencies are demonstrated in thin-film form. 20 cm long resonant elements are formed using double-sided patterning of copper-clad polyimide, based on single-turn inductors and parallel-plate capacitors that use the substrate as an interlayer dielectric. Continuous…
The use of the [Mo(3)S(4)(Hnta)(3)](2-) complex (nta(3-) = nitrilotriacetate) as structuring agent toward the self-condensation process of the [Mo(2)O(2)S(2)(OH(2))(6)](2+) cation leads to the largest oxothiomolybdenum ring. In the solid state, X-ray diffraction analysis reveals the presence of the targeted molecular…
In this letter, a method of generating spatially defined electrospun microarchitectures by direct photolithographic patterning of electrospun films is described. A photoinitiator, benzoin methyl ether, is incorporated into a solid thermoplastic electrospun polyurethane matrix selectively photo-cross-linked by standard…
Coil-in-coil carbon nanocoils (CNCs) were synthesized by means of acetylene decomposition using nickel nanoparticles as catalysts. The investigations revealed that there are often several CNCs self-assembled in one nanospring. The yield of coil-in-coil CNCs was high up to 11 g in each run at the decomposition temperat…
The effects of the nanocrystal size on the emission spectra and decay rates of upconverting hexagonal NaYF(4):Yb,Er nanocrystals are investigated. The influence of nanocrystal size is represented in terms of the surface area/volume ratio (SA/Vol). Our results show that a small nanocrystal size, or large SA/Vol ratio i…
Eu 3+ doped ZnMoO 4 with charge compensation were synthesized by solid-state reactions. The phosphors with different charge compensation approaches, and , were studied in detail. All of the phosphors can be effectively excited by 396 and 467 nm light, and exhibit superior red emission around 614 nm to ZnMoO 4 : Eu 3+…
Abstract There is a growing interest in understanding how size‐dependent quantum confinement affects the photoluminescence efficiency, excited‐state dynamics, energy‐transfer and thermalization phenomena in nanophosphors. For lanthanide (Ln 3+ )‐doped nanocrystals, despite the localized 4f states, confinement effects…
BACKGROUND AND OBJECTIVES: During the past decade, nephrogenic systemic fibrosis (NSF) has been reported in patients who have severe renal impairment and have been exposed to a gadolinium (Gd)-based contrast agent during magnetic resonance imaging (MRI). As a result of positive reporting bias, many suitable patients w…
We use confocal microscopy to explore shear melting of colloidal glasses, which occurs at strains of approximately 0.08, coinciding with a strongly non-Gaussian step size distribution. For larger strains, the particle mean square displacement increases linearly with strain and the step size distribution becomes Gaussi…
OBJECTIVE: The purpose of this study was to retrospectively assess the frequency, manifestations, and severity of acute adverse reactions associated with administration of two gadolinium-based contrast agents to patients who underwent MRI at a single large academic institution. MATERIALS AND METHODS: Data from continu…
Gradient index metamaterials have wide applications in the microwave and optical fields. Based on the quasi-static theory, such materials at the microwave band have been realized by drilling hole arrays on ordinary dielectric materials. As applications of the gradient index metamaterials, novel devices including a 45°…
Dy(3+)-doped gallium oxide hydroxides (GaOOH:Dy(3+)) with various morphologies (submicrospindles, submicroellipsoids, 3D hierarchical microspheres) were synthesized by a facile soft-chemical method. After annealing at 1000 degrees C, the GaOOH:Dy(3+) precursor was easily converted to beta-Ga(2)O(3):Dy(3+) phosphors wh…
Epitaxial growth, a bottom-up self-assembly process for creating surface nano- and microstructures, has been extensively studied in the context of atoms. This process, however, is also a promising route to self-assembly of nanometer- and micrometer-scale particles into microstructures that have numerous technological…
In this article, we seek to enable large-scale, fully reversible, thermally induced volumetric changes in layer-by-layer (LbL) electrostatically self-assembled thin films through the incorporation of A-B-A triblock copolymers. Poly( N, N -dimethylaminoethyl methacrylate)- b -poly(propylene oxide)- b -poly( N, N -dimet…
Carbon nanoribbons (CNRs) are graphene (planar) structures with a large aspect ratio. Carbon nanobelts (CNBs) are small graphene nanoribbons rolled up into spiral-like structures, i.e. carbon nanoscrolls (CNSs) with a large aspect ratio. In this work we investigated the energetics and dynamical aspects of CNBs formed…