Materials Literature
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Phenomenological models suggest that thin epitaxial SrTiO${}_{3}$ films on silicon will exhibit ferroelectric behavior as a result of compressive strain. However, such models do not include atomic-scale interface effects, which can dramatically alter the predicted behavior. In this paper, we use density functional the…
X-ray absorption spectroscopy and ab initio modeling of the experimental spectra have been used to investigate the effects of surface passivation on the unoccupied electronic states of CdSe quantum dots (QDs). Significant differences are observed in the unoccupied electronic structure of the CdSe QDs, which are shown…
To optimize the biological activity of pyrrole-imidazole polyamide DNA-binding molecules, we characterized the aggregation propensity of these compounds through dynamic light scattering and fractional solubility analysis. Nearly all studied polyamides were found to form measurable particles 50-500 nm in size under bio…
Wet-chemically synthesized CdSe seeded CdS nanotetrapods incorporated into silica matrices have been explored as high performance nanocrystal-based optical amplifiers. Varying the physical dimensions of the tetrapods allowed for room temperature biexcitonic amplified spontaneous emission (ASE) at wavelengths correspon…
We study the effect of nonsolvent on the formation of polymer nanomaterials in the nanopores of porous templates. Water (nonsolvent) is added into a poly (methyl methacrylate) (PMMA) solution in dimethylformamide (DMF) confined in the nanopores of an anodic aluminum oxide (AAO) template. Water forms a wetting layer on…
OBJECTIVE: To investigate the antibacterial effect of augmenting a biological dressing with polymer films containing silver nanoparticles. BACKGROUND: Biological dressings, such as Biobrane, are commonly used for treating partial-thickness wounds and burn injuries. Biological dressings have several advantages over tra…
Abstract A nanocomposite film of La 0.67 Sr 0.33 MnO 3 (LSMO):ZnO is synthesized by depositing LSMO solution on a vertical array of ZnO nanorods grown on (0001) Al 2 O 3 substrate. The magnetic behavior of the composite film differs from that of a pure LSMO film, possibly due to smaller grain size in the composite, sm…
Iron titanate nanopowders with a particle size range of 48–70 nm could be obtained after calcinations of the dried gel at 900°C for 2 h. Fe2TiO5 indicates a ferrimagnetic–paramagnetic behaviour, as evidenced by using vibrating sample magnetometer at room temperature. In the temperature range of 25–300°C the empirical…
A comparative study of polytetrafluoroethylene (PTFE) surfaces treated by the post-discharge of He and He-O(2) plasmas at atmospheric pressure is presented. The characterization of treated PTFE surfaces and the species involved in the surface modification are related. In pure He plasmas, no significant change of the s…
The size-selective synthesis of hexagonal Sb 2 Te 3 nanoplates by thermal decomposition of the single-source precursor bis(diethylstibino)telluride (Et 2 Sb) 2 Te is described for the first time. The role of the thermolysis temperature and the concentration of the capping agent (PVP*) on the growth of the nanoplates w…
Abstract Magnetic shape memory alloys (MSMA) are a promising material for actuation purposes as they provide relatively large strains and relatively high operation frequencies. In this paper three concepts of such actuators are introduced. The first part will describe a so called spring actuator, where the MSM element…
Detailed structural and electrical investigations were carried out on a GdSc 1– x In x O 3 (0.0 ≤ x ≤ 1.0) series. The solubility of In 3+ in GdScO 3 could be increased by 20 mol % by changing the synthesis route. GdScO 3, a technologically important dielectric material, could be synthesized at a temperature as low as…
A hybrid organic/inorganic up-converter for pixel-less near-infrared (NIR) imaging has been designed and demonstrated. The device is fabricated by direct tandem integration of an organic light-emitting diode with an i-InGaAs substrate. A good-quality 1.5 μm NIR to 520 nm visible green light up-conversion image with a…
OBJECT: Recent studies indicate that M13 bacteriophage, a very large nanoparticle, binds to β-amyloid and α-synuclein proteins, leading to plaque disaggregation in models of Alzheimer and Parkinson disease. To determine the feasibility, safety, and characteristics of convection-enhanced delivery (CED) of M13 bacteriop…
A doubly biomimetic PMNC polymer bearing cell antifouling phosphorylcholine and mussel adhesive protein catechol groups is synthesized. The polymer can be deposited onto a variety of substrates by dip-coating in an aqueous solution, adhering to surfaces via the catechol functional group while at the same time forming…
Significant advances have been made on our understanding of the fate and transport of engineered nanomaterials. One unexplored aspect of nanoparticle aggregation is how environmental stimuli such as light exposure and temperature variations affect the mobility of engineered nanoparticles. In this study, TiO(2), ZnO, a…
Transparent AlON was pressurelessly sintered from powders synthesized by a two‐step carbothermal nitridation method, using core‐shell structured Al 2 O 3 / C mixture derived from the pyrolysis of an Al 2 O 3 /ureaformaldehyde‐resin nanocomposite precursor as the starting material. It was found that the amorphous carbo…
Janus particles with differentially degradable compartments were prepared by electrohydrodynamic (EHD) co-jetting and subsequent controlled crosslinking. These bicompartmental particles are composed of an interpenetrating polymer network of poly(ethylene oxide) and poly(acrylamide-co-acrylic acid) in one hemisphere an…
OBJECTIVE: The drug-loaded PEGylated nanomaterials have shown effective cell-killing in vitro, but to the best of authors' knowledge there have been no reports of successful drug delivery in vitro and in vivo using polyethyleneglycol-2000-distearoyl phosphatidyl ethanolamine (PEG2000-DSPE) nanomaterials loaded with un…
Silver nanoparticles were synthesized by an enzyme-induced growth process on solid substrates. In order to customize the enzymatically grown nanoparticles (EGNP) for analytical applications in biomolecular research, a detailed study was carried out concerning the time evolution of the formation of the silver nanoparti…