Materials Literature
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Abstract In recent years, the porous silica structures (frustules) created by living diatoms have been studied for several nanoengineering applications based on biomimetic approaches. We focus on the gas‐sensing properties of diatoms: investigation of different species shows that the photoluminescence emission of frus…
Composites of single-walled carbon nanotubes (SWNT) and polystyrene have been prepared using three different types of SWNT: HiPco, CoMoCat, and pulsed laser vaporization (PLV). Nanotubes were incorporated into the polystyrene matrix by two methods: (1) evaporation of chloroform solutions of SWNT noncovalently function…
The theory of the anomalous Hall effect for the heat transfer in a parmagnetic dielectric, discovered by Strohm, Rikken, and Wyder [Phys. Rev. Lett. 95, 155901 (2005)]10.1103/PhysRevLett.95.155901, is developed. The appearance of the phonon heat flux normal to both the temperature gradient and the magnetic field is co…
Abstract Nanoscaled crosslinked poly(vinyl alcohol) PVA fibers were prepared by electrospinning. This study described its electrospinning process, structure, and filtration applications. The fibers were found to be efficiently crosslinked by maleic acid. Vitriolic acid was used as a catalyst activator during crosslink…
We derive conservation and balance laws for the translational gauge theory of dislocations by applying Noether's theorem. We present an improved translational gauge theory of dislocations including the dislocation density tensor and the dislocation current tensor. The invariance of the variational principle under the…
The intriguing nano-structural properties of a ZnMnGaO4 film epitaxially grown on MgO (001) substrate have been investigated using synchrotron radiation-based x-ray diffraction. The ZnMnGaO4 film consisted of a self-assembled checkerboard (CB) structure with perfectly aligned and regularly spaced vertical nanorods. Th…
The surface evolution model based on geometric partial differential equation is used to numerically study the kinetics of dewetting and dynamic morphologies for the localized pinhole defect in the surface of the ultrathin solid film with the strongly anisotropic surface energy. Depending on parameters such as the init…
The linear 1-alcohols n-C(16)H(33)OH, n-C(17)H(35)OH, n-C(19)H(39)OH have been imbibed and solidified in lined up, tubular mesopores of silicon with 10 and 15 nm mean diameters, respectively. X-ray diffraction measurements reveal a set of six discrete orientation states ("domains") characterized by a perpendicular ali…
We study the diffusive dynamics of a hard-sphere fluid confined between parallel smooth hard walls. The position-dependent diffusion coefficient normal to the walls is larger in regions of high local packing density. High density regions also have the largest available volume, consistent with the fast local diffusivit…
The quaternary antimonide oxides REMnSbO (RE = La, Ce, Pr, Nd, Sm, Gd, Tb) and REZnSbO (RE = La, Ce, Pr) were synthesized from the RESb monoantimonides and MnO, respectively ZnO. We report on single crystal X-ray data and a detailed 121Sb Mössbauer spectroscopic investigation.
The crystallization of a binary system is investigated in computer model which takes into account a temperature dependence of diffusion coefficient and a nonequilibrium partition of dissolved component of the alloy. The dependence of interface velocity on an undercooling at the dendrite tip is obtained during rapid so…
We have analyzed by using scanning tunneling microscopy (STM) thin films made of few (three to five) graphene layers grown on the C terminated face of $6H\text{\ensuremath{-}}\mathrm{Si}\mathrm{C}$ in order to identify the nature of the azimuthal disorder reported in this material. We observe superstructures which are…
Self-assembled nanofibers of a chiral core-unsubstituted perylene bisimide dye exhibit an almost black color, which can be attributed to an unusual packing motif based on slipped J-type aggregation.
Experimental and mathematical modeling studies were performed to investigate the transport and retention of nanoscale fullerene aggregates (nC60) in water-saturated porous media. Aqueous suspensions of nC60 aggregates (95 nm diameter, 1 to 3 mg/L) were introduced into columns packed with either glass beads or Ottawa s…
AIMS: To synthesize silver-loaded zeolite X and establish the extent to which it persist in its antimicrobial action against strains of Escherichia coli K12W-T, Pseudomonas aeruginosa NCIMB8295 and Staphylococcus aureus NCIMB6571. METHODS AND RESULTS: The antimicrobial action and efficacy of silver-loaded zeolite X on…
The temperature-dependent diffusion coefficients of interstitial hydrogen, deuterium, and tritium in nickel are computed using transition state theory. The coefficient of thermal expansion, the enthalpy and entropy of activation, and the pre-exponential factor of the diffusion coefficient are obtained from ab initio t…
Gold nanoparticles are encapsulatedwithin thermoresponsive pNIPAMmigrogels through an easy two-stepprotocol. The core/shell structure ofthe composite is characterized by TEM,AFM, PCS, and UV-vis spectroscopy. The restricted environment and thehigh porosity of the microgel shell arestudied through the overgrowth of the…
A powerful magnetic nanoprobe with folic acid (FA)-targeting ligands is fabricated by dendrimer functionalization of Fe3O4 nanoparticles (NPs) precoated with crosslinkable and biocompatible polymer multilayer shells. This magnetic probe allows for magnetic resonance imaging of FA receptor-overexpressing tumor cells in…
Motivated by the surge in research activities on graphene, we investigate instabilities of electrons on the honeycomb lattice, interacting by onsite and nearest-neighbor terms, using a renormalization group scheme. Near half band filling, critical minimal interaction strengths are required for instabilities toward ant…
An electrostatic tuner: Long-range isotropic electrostatic repulsion between identically charged nanoparticles can become anisotropic in the presence of short-range anisotropic dipolar interactions, thus endorsing anisotropic self-assembly of the nanoparticles into chains. The length of these particle chains can be tu…