Materials Literature
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Abstract A personal review is presented on 50 years of my research experiences in working on research on carbon science and carbon‐based nanostructures. The text is based on a talk given in Warsaw, Poland, on this topic, presented at a meeting of the European Materials Research Society in September 2010.
We show that dielectric spheres can be cloaked by a shell of amorphously arranged metallic nanoparticles. The shell represents an artificial medium with tunable effective properties that can be adjusted such that the scattered signals of shell and sphere almost cancel each other. We provide an analytical model for the…
Currently, the preparation of polypropylene (PP) foam with a well-defined cell structure and a high expansion ratio is receiving increased attention. However, the present technical problems such as poor cell nucleation ability and weak melt strength of polymer resin, hinder the broader use of linear PP in foam product…
The present investigation reports an extensive evaluation of in vitro and in vivo anticancer efficacy of orally administered doxorubicin-loaded poly(lactic-co-glycolic acid) (PLGA) nanoparticles (Dox-NPs) in a breast cancer induced animal model. Spherically shaped Dox-NPs were prepared with an entrapment efficiency an…
Surface plasmon excitation of aqueous colloidal gold nanoparticles with visible light in the presence of H 2 O 2 led to rapid and selective oxidation of sec -phenethyl and benzyl alcohols to acetophenone and benzaldehyde, respectively. Laser drop, light emitting diode, and microwave irradiation have been used as energ…
Mesoporous carbon composite thin films (<500 nm) containing cobalt and vanadium oxide were synthesized by triconstituent self-assembly using Pluronic F127 as template, phenol-formaldehyde oligomer (resol) as carbonizable precursor, and cobalt (or vanadyl) acetylacetonate (acac) for the metal source. The ordered mesost…
A facile surfactant-free process is introduced to prepare multifunctional polypropylene (PP) nanocomposites filled with highly dispersed Fe@Fe 2 O 3 core@shell nanoparticles (NPs). Transmission electron microscopy (TEM) observations confirm the formation of uniform NPs in the PP matrix and the particle size increases…
Low temperature epitaxial breakdown of inhomogeneously strained Si capping layers is investigated. By growing Si films on coherently strained GeSi quantum dot surfaces, we differentiate effects of surface roughness, strain, and growth orientation on the mechanism of epitaxial breakdown. Using atomic force microscopy a…
The crystal and magnetic structure of the magnetocaloric compound FeMnP0.5Si0.5 have been studied by means of neutron and X-ray powder diffraction. Single phase samples of nominal composition FeMnP0.5Si0.5 have been prepared by the drop synthesis method. The compound crystallizes in the Fe2P-type structure (P-62m) wit…
Effects of nanoscale confinement on the distribution of glass transition temperatures ( T g s) in free-standing polystyrene (PS) films are determined via a multilayer/self-referencing fluorescence method employing a pyrene dye label. Average film T g s yield a T g -confinement effect in agreement with the molecular we…
Worm holes: Cylindrical or wormlike block copolymer micelles with gold nanoparticles encapsulated in a micellar core were fabricated through directed supramolecular assembly. This versatile approach allows fine-tuning of interparticle spacing and micellar morphology by varying the content of the nanoparticles or hydro…
From a mean-field solution of the Hubbard-Holstein model, we show that a rich variety of different electronic phases can result at the interface between two polar materials such as LaAlO${}_{3}$/SrTiO${}_{3}$. Depending on the strengths of the various competing interactions, viz., the electronic kinetic energy, electr…
Lanthanide-doped nanophosphors have received significant attention for use in biological sensing and imaging due to their unique optical properties.Much like semiconductor
Ligand radicals from salen complexes are unique mixed-valence compounds in which a phenoxyl radical is electronically linked to a remote phenolate via a neighboring redox-active metal ion, providing an opportunity to study electron transfer from a phenolate to a phenoxyl radical mediated by a redox-active metal ion as…
Resilin, the highly elastomeric protein found in specialized compartments of most arthropods, possesses superior resilience and excellent high-frequency responsiveness. Enabled by biosynthetic strategies, we have designed and produced a modular, recombinant resilin-like polypeptide bearing both mechanically active and…
We predict that spin-waves in an easy-plane ferromagnet have a finite lifetime at zero temperature due to spontaneous decays. In zero field the damping is determined by three-magnon decay processes, whereas decays in the two-particle channel dominate in a transverse magnetic field. Explicit calculations of the magnon…
Carboxymethyl cellulose (CMC) particles were synthesized in one step employing inverse micelle microemulsion polymerization using divinyl sulfone as crosslinking agent. These synthesized particles were further modified and demonstrated as drug delivery system. Acyclovir was chosen as the model drug. The synthesized CM…
In practice, physical membranes are exposed to a certain amount of external strain (tension or compression) due to the environment where they are placed. As a result, the behavior of the phonon modes of the membrane is modified. We show that anharmonic effects in stiff two-dimensional membranes are highly suppressed u…
We report results of a detailed experimental investigation into the drying of sessile droplets of aqueous poly(ethylene oxide) (PEO) polymer solutions under various experimental conditions. Samples are prepared with a range of initial concentrations c_0 and are filtered to remove traces of undissolved PEO clusters. In…
Using molecular dynamics simulations and model graphene layers in an organic matrix we demonstrate that interfacial thermal resistance determined via thermal relaxation method is up to an order of magnitude larger than that determined from direct simulation method of heat transfer across the matrix-graphene-matrix int…