Materials Literature
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Abstract Two samples of dendrimer‐like miktoarm star terpolymers: (poly( tert ‐butyl acrylate)) 3 ‐(polystyrene‐poly(ε‐caprolactone)) 3 (P t BA) 3 ‐(PS‐PCL) 3 , and (PS) 3 ‐(P t BA‐poly(ethylene glycol) 3 were prepared using efficient Cu catalyzed Huisgen cycloaddition (click reaction). As a first step, azido‐terminat…
1,3,3‐Trimethylspiroindoline‐2,3′‐3 H ‐naphth[2,1‐ b ][1,4]oxazine ( 1a ) and 6′‐piperidino‐1,3,3‐trimethylspiroindoline‐2,3′‐3 H ‐naphth[2,1‐ b ][1,4]oxazine ( 1b ) were applied as disperse dyes to polyester, nylon and acrylic fabrics. Under optimised dyeing conditions, photochromic fabrics were produced which, on ir…
The synthesis and characterization of ionic liquid crystal dendrimers and hyperbranched polymers based on the ammonium salts of commercially available dendrimers poly(propylene imine) [PPI-(NH 2 ) n ] (with n = 16), and poly(amidoamine) [PAMAM-(NH 2 ) n ] (with n = 16), and random hyperbranched poly(ethyleneimine) (PE…
Near-infrared fluorescence videomicroscopy has been used to study simultaneously the translational and rotational diffusion of individual semiconducting single-walled carbon nanotubes (SWCNTs) in aqueous suspension. Analysis of translational trajectories revealed diffusion coefficient values from approximately 0.3 to…
A new, generic method to exercise control over the shape of crystallites is reported. Crystals of PbS are grown in the unusual form of pyramids at the water-toluene interface. The pyramids are single crystalline and adopt a unique growth habit (slow growth along [113] direction). The pyramids are exclusive products of…
A unified homogenization procedure for split-ring metamaterials taking into account time and spatial dispersion is introduced. It is shown that electromagnetic and magnetoinductive waves propagating in the metamaterial are obtained from this analysis. Therefore, the proposed time and spatially dispersive permeability…
The reaction kinetics of cyclohexene epoxidation using aqueous H2O2 oxidant and the highly selective epoxidation catalyst Bu(cap)TaSBA15 were studied. The reaction was determined to be first-order in Ta(V) surface coverage. The reaction rate exhibited saturation with respect to increasing concentrations of cyclohexene…
We study the alignment of micron-scale particles at air-water interfaces with unequal principle radii of curvature by optical microscopy. The fluid interface bends to satisfy the wetting conditions at the three phase contact line where the interface intersects the particle, creating deflections that increase the area…
Ternary CdS x Te 1− x semiconductor quantum dots with both homogeneous and gradient composition have been fabricated via pyrolysis of organometallic precursors. The nanocrystal structure, size, and composition were characterized by UV−visible absorption and fluorescence spectroscopy, transmission electron microscopy,…
A simple and effective protocol for detections of protein-protein and protein-small molecule interactions has been developed. After interactions between proteins and their corresponding ligands, we employed colloidal silver staining for producing active substrates for surface-enhanced Raman scattering (SERS) and surfa…
The synthesis and optical properties of core/shell and core/shell/shell nanocrystals based on CdTe nanocrystals are described. The influence of the different charge-carrier separation in the CdTe/CdS nanocrystals (type-I heterostructure) and the CdTe/CdSe nanocrystals (type-II heterostructure) is examined. The behavio…
DC and ac magnetization, resistivity, specific-heat, and neutron-diffraction data reveal that stoichiometric LaFePO is metallic and non-superconducting above $T=0.35\text{ }\text{K}$, with $\ensuremath{\gamma}=12.5\frac{\text{mJ}}{\text{mol}\text{ }{\text{K}}^{2}}$. Neutron-diffraction data at room temperature and $T=…
Novel copolymer nanoparticles with inherent self-stability, narrow size distribution, and high electrical conductivity are facilely and productively synthesized by the oxidative precipitation polymerization of 5-sulfonic-2-anisidine and aniline in acidic medium without any external stabilizer. The structures of the co…
While surface-enhanced Raman scattering (SERS) can increase the Raman cross-section by 4-6 orders of magnitude, for SERS to be effective it is necessary for the analyte to be either chemically bonded or within close proximity to the metal surface used. Therefore most studies investigating the biochemical constituents…
In this manuscript, we demonstrate a synthesis of ordered mesoporous carbon via a self-assembly of resorcinol-formaldehyde polymer and surfactant F127 in aqueous phase in the presence of glutamic acid as the catalyst. It was found that the amounts of glutamic acid and surfactant F127 in the synthesis are important in…
We present an ab initio study of the electronic structure of a number of high-pressure metastable phases of silicon with tetrahedral bonding. The phases studied include all experimentally determined phases that result from decompression from the metallic $\ensuremath{\beta}$-Sn phase, namely, the BC8 (Si III), hexagon…
The ionic liquid of 1-allyl-3-methylimidazolium chloride ([amim]Cl) was used as the good solvent to dissolve celluloses. Cellulose concentration covers the range of 0.1-3.0 wt %, spanning both the dilute and semidilute regimes. The rheological properties of the cellulose ionic liquid solutions have been investigated b…
Chemical exchange saturation transfer (CEST) MRI has been shown capable of detecting dilute labile protons and abnormal tissue glucose/oxygen metabolism, and thus, may serve as a complementary imaging technique to the conventional MRI methods. CEST imaging, however, is also dependent on experimental parameters such as…
We have fabricated a metallic structure in an organic Mott insulator $κ$-(BEDT-TTF)$_2$Cu[N(CN)$_2$]Cl. The periodic metallic domains of approximately 90$\times$90 $μ$m$^2$ obtained by X-ray irradiation through a molybdenum mesh mask are visualized by scanning microregion infrared reflectance spectroscopy technique. N…
Metastable manganite perovskites displaying the antiferromagnetic so-called $E$ phase are predicted to be multiferroic. Due to the need of high pressures for the synthesis of this phase, this prediction has only been confirmed in bulk ${\text{HoMnO}}_{3}$. Here we report on the growth and characterization of ${\text{Y…