Materials Literature
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This work describes the encapsulation of hydrogen storage materials from organic solvents. Due to complex formation the shell provides stability and selective permeability. Specifically, sodium borohydride particles were encapsulated within polymer films by the layer-by-layer self-assembly of oppositely charged polyel…
Motivated by a recent experimental study on the interaction between colloidal particles in a confined nematic liquid crystal [M. Vilfan, N. Osterman, M. \ifmmode \check{C}\else \v{C}\fi{}opi\ifmmode \check{c}\else \v{c}\fi{}, M. Ravnik, S. \ifmmode \check{Z}\else \v{Z}\fi{}umer, J. Kotar, D. Babi\ifmmode \check{c}\els…
Organic−inorganic hybrid gels have been synthesized from the multifunctional cyclic siloxane, 1,3,5,7-tetramethylcyclotetrasiloxane (TMCTS), or the cubic silsesquioxane, 1,3,5,7,9,11,13,15-octakis(dimethylsilyloxy)pentacyclo-[9,5,1,1,1,1]octasilsesquioxane (POSS), as cross-linking reagents with α,ω-nonconjugated diene…
A series of blend films have been prepared from cellulose and corn protein in a NaOH/urea solution by a simple, low cost, and 'green' pathway. Their structure and properties are characterized by amino acid analysis, X-ray diffraction, scanning electron microscopy, thermogravimetry, and tensile testing. The results rev…
Applying a synthetic fluorohectorite that shows giant lateral extensions, a microscopic bending test is performed using atomic force microscopy (see image). Due to the significantly weaker bonding strength between neighboring lamellae along the stacking direction, the C33 elastic constant of synthetic Na0.5-fluorohect…
Indium oxide (In(2)O(3)) nanowires (with diameters of 25-90 nm and lengths of 10-50 microm), nanotowers (with diameters 100-150 nm and lengths below 10 microm) and long layered nanorods (with diameters of 200-400 nm and lengths of 20-50 microm) are grown through carbothermal reduction of In(2)O(3) powder by varying th…
The four-probe electrical resistivity measurements on a single-component molecular semiconductor [Ni(ptdt)(2)] (Ni(S(8)C(9)H(6))(2)) was performed up to 20.7 GPa by using a diamond anvil cell. A newly improved method was employed to reduce the effect of uniaxial pressure. The semiconducting behavior persisted up to 17…
A novel well-defined amphiphilic block copolymer, with the polyhedral oligomeric silsesquioxane (POSS) moiety at the junction of the two blocks of polystyrene and poly(ethylene oxide) (PEO), was designed and synthesized. First, a macroinitiator containing a POSS moiety and a PEO chain was prepared and then atom transf…
A strong interface between the single-walled carbon nanotubes (SWNTs) and polymer matrix is necessary to achieve enhanced mechanical properties of composites. In this work a series of sidewall-functionalized SWNTs have been investigated in order to evaluate the effect of functionalization on SWNT aspect ratio and comp…
Perylenediimide (PDI) dyes have attracted a great deal of attention as they possess excellent photochemical stability, high extinction coefficients, and fluorescence quantum yields. The use of multiple PDI chromophores in one synthetic architecture increases their versatile use and functionality even more. However, br…
The modulation of optoelectronic properties, such as the bandgap of a pure-component semiconductor material, is a useful ability that can be achieved by few techniques. Atomic layer deposition (ALD) was used here to experimentally demonstrate the ability to deposit films that exhibit quantum confinement on three-dimen…
Raman scattering, IR reflectance and modulated-DSC measurements are performed on specifically prepared dry (AgI)(x)(AgPO(3))(1-x) glasses over a wide range of compositions 0%<x<60%. A reversibility window is observed in the 9.5%<x<37.8% range, which fixes the elastically rigid but unstressed regime also known as the i…
We report the synthesis of single-crystalline Mn 4 Si 7 nanowires using SiO and MnCl 2 powders via the chemical vapor deposition method and their ferromagnetic properties. It is shown from XRD and TEM analyses that the synthesized nanowires have single-crystalline tetragonal Mn 4 Si 7 structure with the growth directi…
Under high-pressure/high-temperature conditions of 5 GPa and 1250 °C, the cubic phase Ga 2.79 ◻ 0.21 (O 3.05 N 0.76 ◻ 0.19 ) (◻ = vacancy) was synthesized in a Walker-type multianvil apparatus. For the first time, the crystal structure of a gallium oxonitride was determined on the basis of single crystal X-ray diffrac…
The variation of electronic states and structural distortion in highly compressed multiferroic ${\text{TbMnO}}_{3}$ was probed by x-ray diffraction (XRD) and x-ray absorption spectroscopy (XAS) using synchrotron radiation. Refined XRD data enabled observation of a reduced local Jahn-Teller (JT) distortion of Mn sites…
We present a comprehensive theoretical study of $1/f$ noise in chalcogenide glasses aimed at applications to the developing technology of phase change memory. Our consideration is based on a body of formerly established facts about the atomic and electronic excitations specific to the chalcogenide glasses, which have…
The ionic liquid (IL), 1-allyl-3-(1-butyl)imidazolium chloride (AlBuImCl), has been synthesized and its properties determined. Increase in the temperature increased its conductivity and decreased its density, polarity, and viscosity. Microcrystalline cellulose (MCC), dissolves in this IL by heating at 80 degrees C; th…
Abstract Eu 2+ : calcium silicate glass ceramics (GC) containing β‐Ca 2 SiO 4 and Ca 3 Si 2 O 7 crystal phosphors were fabricated by cerammization process from a GC that were prepared by a novel GC preparation; frozen sorbet method. The GC obtained (as‐made GC) consisted of glass and spherical β‐Ca 2 SiO 4 crystal pha…
We have developed a simple and scalable approach for fabricating sub-wavelength structures (SWS) on silicon nitride by means of self-assembled nickel nanoparticle masks and inductively coupled plasma (ICP) ion etching. Silicon nitride SWS surfaces with diameter of 160-200 nm and a height of 140-150 nm were obtained. A…
The static and dynamic behaviors of partially charged and end-grafted polyelectrolyte brushes in response to electric fields were investigated by means of molecular dynamics simulation. The results show that the polymer brushes can be partially or fully stretched by applying an external electric field. Moreover, the b…