Materials Literature
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We have recently observed amorphous–amorphous transitions incurred upon decompressing very high density amorphous ice (VHDA) at 140 K from 1.1 to <0.02 GPa in a piston–cylinder setup by monitoring the piston displacement as a function of pressure and by taking powder x-ray diffractograms of quench-recovered samples (W…
Polystyrene particles incorporating poly(methylphenylsilane) (PMPS) were synthesized by miniemulsion polymerization. UV irradiation of the emulsion under air in the presence of metal salts such as HAuCl4.4H2O, AgNO3, and Na2PdCl4 led to the formation of metal nanoparticles on the surface of polymer particles; thus, me…
Pd ion substituted Ce1-xMxO2-delta (M = Ti, Zr, Hf) have been prepared by a single step solution combustion method. Two atom% Pd ion substitution in the title compounds is confirmed by X-ray diffraction (XRD) and Pd ion charge state and redox properties have been determined by X-ray photoelectron spectroscopy (XPS) an…
The surface-enhanced Raman scattering (SERS) spectra obtained using Ag nanoparticles (NPs) dispersed in 1- n -butyl-3-methylimidazolium tetrafluoroborate (BMIBF 4 ) ionic liquid and from an Ag island film spin coated with BMIBF 4 are reported. The SERS spectra of the Ag NPs/BMIBF 4 interface do not show enhancement of…
Abstract Composite films of poly(3,4‐ethylenedioxythiophene) (PEDOT)‐coated over functionalized multiwalled coiled and linear carbon nanotubes (CNTs) have been fabricated by a simple oxidative electropolymerization route. The nanotubular morphology of the polymer–CNT composite is responsible for the lower charge trans…
Development of fibrous nanocomposites of hydroxyapatite (HA) and poly( dl -lactide) (PDLLA) offers great potential as tissue engineering scaffolds. Attempts have been made to solve problematic issues of the agglomeration of HA crystallites in fibrous mats to enhance the mechanical property and bioactivity. A novel met…
The resolving power of high-resolution transmission electron microscopes is characterized by the information limit, which reflects the size of the smallest object detail observable with a particular instrument. We introduce a highly accurate measurement method for the information limit, which is suitable for modern ab…
We propose a theoretical model for a quantum dot (QD)–lipid mixed system based on a simple geometrical assumption for a single-component lipid (DOPC) monolayer deformation profile. In this system, there are two possible states: a quantum dot–liposome complex (QLC) state where QDs are incorporated into the lipid bilaye…
Molecular mechanisms of crystal growth and homogeneous nucleation from the melt of polyethylene-like linear polymer are investigated by molecular dynamics simulations. The present paper is aimed at extending our previous work with respect to the system size and the boundary condition, thereby enabling detailed studies…
Taking the high road is what reactions of primary amine boranes do, according to results recently obtained by Manners and co-workers, when a homogeneous catalyst is used to prepare soluble aminoborane polymers and copolymers (see scheme; pocop=ϰ3-1,3-(OPtBu2)2C6H3). Such metal-catalyzed dehydrocoupling reactions for t…
Pick and choose: Achieving acceptable selectivities from alcohols to desirable aldehydes or ketones remains a challenge. Bulk Au(111) pre-covered with atomic oxygen is highly selective for the partial oxidation of 1- and 2-propanol. Insights into intrinsic mechanistic details for high-surface-area gold-based catalysts…
Aggregation of peptides into amyloid fibrils or other β-sheet structures is usually related to malfunction. This process is often induced by lipid bilayers but is difficult to monitor in the membrane-bound state. Here, we show how aggregation is readily detected by solid state 19 F NMR using a fluorine-labeled amino a…
The metastable ilmenite polymorph of NaNbO(3), instead of the expected perovskite polymorph, may be prepared directly in one step under mild hydrothermal conditions by lowering pH and using close to stoichiometric amounts of metal precursors; in situ energy-dispersive X-ray diffraction shows that crystallisation occur…
The study of polymer crystallization enhanced by flow has attracted much interest because it implies the possibility of controlling the final morphology and the resulting mechanical and functional properties of semicrystalline polymers. An improved understanding of the fundamentals of flow-enhanced crystallization eff…
A series of 9,10-diarylanthracenes with various substituents at the ortho positions have been synthesised by palladium-catalysed cross-coupling reactions. Such compounds exhibit interesting physical properties and can be applied as molecular switches. Despite the high steric demand of the substituents, products were f…
A multicomponent cluster has been synthesised in which four disparate chromophores have been covalently linked through a logical arrangement that favours efficient photon collection and migration to a terminal emitter. The primary energy acceptor is a boron dipyrromethene (Bodipy) dye and different polycyclic aryl hyd…
Compared with noble metals and quantum dots, dielectric complex oxide nanoparticles are significantly less popular due to their high crystallization temperature, making difficult their synthesis in the 10-100 nm range for which surface effects are reduced. We report here an original process permitting thermal annealin…
The performance of the Heyd-Scuseria-Ernzerhorf (HSE) and single parameter long-range corrected Perdew-Burke-Ernzerhorf (LC-omegaPBE) range-separated hybrids for predicting magnetic coupling constants has been investigated for a broad set of magnetic molecular systems for which accurate experimental data exist. The se…
We report on the effects of the surface density and the spacing between grafted organoamines (and residual ungrafted silanols) of amine-functionalized mesoporous materials on their (cooperative) catalytic activity in the Henry reaction. The spacing between the bifunctional groups (amines and silanols), their site isol…
Recently, particular interest has been placed in the study of a strikingly counter-intuitive phenomenon: the clustering of purely repulsive soft particles. This contribution serves the purpose of both reviewing our current understanding of the multiple occupancy crystals and presenting details of recently developed ta…