Materials Literature
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To develop a new system for site-specific targeting, superparamagnetic CaCO(3) mesocrystals with the properties of biocompatibility and biodegradability are designed and synthesized. They serve as carriers for the co-delivery of drug and gene nanoparticles via a multistage method for cancer therapy. With a porous stru…
Nanoparticles (NPs) offer promise for a multitude of biological applications including cellular probes at the bio-interface for targeted delivery of anticancer substances, Raman and fluorescent-based imaging and directed cell growth. Nanodiamonds (NDs), in particular, have several advantages compared to other carbon-b…
Cubic BaCo 0.7 Fe 0.3− x Y x O 3−δ (BCFY, x = 0.08−0.2) was prepared by the conventional solid state reaction route as oxygen permeation membranes. The effects of Y-doping on the crystal structure, electrical conductivity, and oxygen permeability are investigated, and the factors influencing the activation energy of o…
Cu2O microcrystals with various shapes were obtained by reducing copper nitrate with formic acid, employing NH3·H2O as the morphology tailor. The volume of NH3·H2O plays a key role in controlling the final morphology, and hence Cu2O with various shapes, such as sphere, hexapod, octahedron, truncated octahedron and rho…
We compared three formulations of the discrete dipole approximation (DDA) for simulation of light scattering by particles with refractive indices m=10+10i , 0.1+i , and 1.6+0.01i . These formulations include the filtered coupled dipoles (FCD), the lattice dispersion relation (LDR) and the radiative reaction correction…
The relation between the macroscopic and the microscopic (lattice) strain response to external uniaxial stress has been investigated for porous ceramics. Analytical and finite element modeling (FEM) have been performed and neutron diffraction data on porous sintered alumina and extruded honeycomb SiC have been used to…
Textured Nb 4 AlC 3 ceramic was successfully fabricated in a strong magnetic field followed by spark plasma sintering. The optimized suspension parameters for slip casting were determined to be 20 vol% Nb 4 AlC 3 and 2 wt% polyethyleneimine dispersant of powder in deionized water. After texturing in a strong 12 T magn…
Magnetic resonance imaging can characterize and discriminate among tissues using their diverse physical and biochemical properties. Unfortunately, submicrometer screening of biological specimens is presently not possible, mainly due to lack of detection sensitivity. Here we analyze the use of a nitrogen-vacancy center…
Tris (dibenzoylmethanido) (o-phenanthroline)-europium(III) complexes [Eu(DBM)(3)(Phen)(x)] have been synthesized, and their structural, thermal, and fluorescence properties have been investigated both as an independent complex and also after embedding it in poly(methyl methacrylate) (PMMA) polymer matrix. X-ray analys…
Porous nanocomposites consisting of cellulose nanocrystals (CNXLs) and polypyrrole (PPY) were fabricated using electrochemical co-deposition. The CNXLs were extracted from cotton using sulfuric acid hydrolysis and were subjected to 2,2,6,6-tetramethylpiperidine-1-oxyl-mediated oxidation, in which primary hydroxyls wer…
We describe a unique class of metamaterials that exhibit strong uniaxial anisotropy with epsilon-zero response along the optical axis and which optical properties depend strongly on polarization. In an example of array of silver nanowires grown in anodic alumina membrane, the proposed singular uniaxial metamaterial is…
High-energy synchrotron radiation has been used to demonstrate an electric-field-induced phase transformation in the ceramic xK1/2Bi1/2TiO3–(1−x)Na1/2Bi1/2TiO3, x=0.2. Application of an electric field ≥2 kV mm−1 leads to a transformation from single phase rhombohedral to a mixture of tetragonal and rhombohedral phases…
A hybrid colloidal ZnS nanoparticles/Si nanotips p-n active layer has been demonstrated to have promising potential for efficient solar spectrum utilization in crystalline silicon-based solar cells. The hybrid solar cell shows an enhancement of 20% in the short-circuit current and approximately 10% in power conversion…
Abstract In this paper we describe disulfide containing, polyglycerol nanogels as a new class of biodegradable materials. These nanoparticles are prepared in inverse miniemulsion via an acid catalyzed ring‐opening polyaddition of disulfide containing polyols and polyepoxides. Varying conditions allow us to tune partic…
The mechanism of hen egg white lysozyme (HEWL) adsorption on a negatively charged, hydrophilic surface has been studied using atomistic molecular dynamics (MD) simulation. Sixteen 90 ns trajectories provide adequate data to allow a detailed description of the adsorption process to be formulated. Two distinct adsorptio…
Strong room temperature visible (red-orange) photoluminescence (PL) has been observed in silicon nanowires (SiNWs) that were realized by wet chemical etching of heavily (arsenic, As: ${10}^{20}\text{ }{\text{cm}}^{\ensuremath{-}3}$) and lowly doped (boron, B: ${10}^{15}\text{ }{\text{cm}}^{\ensuremath{-}3}$) single cr…
We present a time-saving simulator within the framework of the density functional theory to calculate the transport properties of electrons through nanostructures suspended between semi-infinite electrodes. By introducing the Fourier transform and preconditioning conjugate-gradient algorithms into the simulator, a hig…
Epitaxial graphene on SiC possesses, quite remarkably, an electron spectrum similar to that of free-standing samples. Yet, the coupling to the substrate, albeit small, affects the quasiparticle properties. Combining ab initio calculations with symmetry analysis, we derive a modified Dirac-Weyl Hamiltonian for graphene…
We consider coherent thermal conductance through multilayer photonic crystal heterostructures, consisting of a series of cascaded nonidentical photonic crystals. We show that thermal conductance can be suppressed exponentially with the number of cascaded crystals due to the mismatch between photonic bands of all cryst…
We revise the possibility of having an amplified surface potential in ferroelectric field-effect transistors pointed out by [S. Salahuddin and S. Datta, Nano Lett. 8, 405 (2008)]. We show that the negative-capacitance regime that allows for such amplification is actually bounded by the appearance of multidomain ferroe…