Materials Literature
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The formation of temperature-, concentration-, and pH-responsive hydrogels composed of the symmetric long-chain bolaamphiphile dotriacontane-1,1'-diyl bis[[2-(dimethylammonio)ethyl]phosphate] (Me(2)PE-C32-Me(2)PE) was investigated by rheological, scattering, and spectroscopic techniques. At pH 5, this bolaamphiphile i…
Angle-resolved threshold photoelectron spectra are recorded for size-selected beams of sodium chloride nanoparticles (radius = 25−250 nm). The photoelectron angular distributions exhibit a size-dependent asymmetry that is inversely proportional to particle radius. A model of the internal electric field amplitude and t…
Abstract Polypropylene‐based composites reinforced with ground wood pulp (pulp stone) were prepared in the reinforcing range of 20–50 wt %. The mechanical properties of the system were evaluated through the observation of a stiffening effect of the prepared materials, which reached Young's moduli up to 2.3 times highe…
We have deposited ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3}$ (LSMO) thin films on piezoelectric $(1\ensuremath{-}x)\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}\ensuremath{-}x\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ $(x\ensuremath{\sim}0.3)$ (PMN-PT) single-crystal substra…
Single-crystalline ZnO nanorods with different morphologies of radial-shaped needles and single needle were prepared by one-step chemical synthesis in aqueous solutions with and without the surfactant sodium dodecyl sulfate (SDS). The ZnO nanorods prepared in the SDS solution have narrower average width, smaller aspec…
Low-valent vanadium oxide nanostructures have been synthesized in large quantities using commercial V2O5 powder as the precursor by a facile reduction method. The crystal structures and morphologies of vanadium oxide nanostructures can be adjusted by altering the concentrations and types of reductants. VO2(B) nanostru…
Multilayer films composed of poly( l -arginine) (pArg) and mercaptoundecanoic acid (MUA) stabilized gold nanoparticles (Au−MUA NPs) have been fabricated based on the electrostatic layer-by-layer self-assembly technique upon a gold electrode modified with a first layer of mercaptosuccinic acid (MSA). The formation of t…
We have selectively synthesized ultralow density (0.015 ± 0.002 g/cm 3 ) double-walled carbon nanotube (DWNT) arrays. The low mass density is due to the large diameter and low-site density of DWNTs in the arrays. The diameter of the as-grown DWNTs varies from 4.5 to 14.8 nm with a mean value of 7.9 nm. The role of the…
Two homochiral 2D-layered frameworks composed of a Cu2O2 core and dicyanamide (dca) linkers, [Cu((R)-hmp*)(dca)]n (1) and [Cu((S)-hmp*)(dca)]n (2) (hmp*=alpha-methyl-2-pyridinemethanol), have been synthesized and structurally characterized. Preliminary investigations suggest that 1 and 2 show possible ferroelectric be…
In-doped ZnO nanowires were successfully fabricated by thermal evaporation of a powder mixture of Zn, In 2 O 3, and graphite. Field emission of individual In-doped and pure ZnO nanowire was observed in situ by a transmission electron microscopy. The results show that In-doped ZnO nanowires showed an enhanced field emi…
A computer simulation was developed to simulate electron-beam-induced deposition (EBID). Simulated growth produced high-aspect-ratio, nanoscale pillar structures by simulating a stationary Gaussian electron beam. The simulator stores in memory the spatial and temporal coordinates of deposited atoms in addition to the…
Plane and simple! Doubly β-to-β 1,3-butadiyne-bridged diporphyrins have been synthesized efficiently through metal-catalyzed reactions. The double bridges enforce the two porphyrins in a perfectly planar conformation (see picture), which leads to almost a 100 % increase in the two-photon absorption cross section.
A new class of bifunctional architecture combining the useful functions of superparamagnetism and terbium complex luminescence into one material has been prepared via two main steps by a modified Stöber method and the layer-by-layer (LbL) assembly technique. The obtained bifunctional nanocomposites exhibit superparama…
Abstract In this work, multiwalled carbon nanotubes (MWNTs) were surface‐modified and grafted with poly( L ‐lactide) to obtain poly( L ‐lactide)‐grafted MWNTs (i.e. MWNTs‐ g ‐PLLA). Films of the PLLA/MWNTs‐ g ‐PLLA nanocomposites were then prepared by a solution casting method to investigate the effects of the MWNTs‐…
Following our recently developed idea of employing plasmonic covers to cloak an isolated conducting, plasmonic or insulating sphere through scattering cancellation, here we extend this concept by investigating the possibility of cloaking multiple objects placed in close proximity of each other, or even joined together…
We numerically calculate the configurational entropy Sconf of a binary mixture of hard spheres, by using a perturbed Hamiltonian method trapping the system inside a given state, which requires fewer assumptions than the previous methods (Speedy 1998 Mol.Phys. 95 169). We find that Sconf is a decreasing function of the…
We illustrate the main features of a recently proposed method based on ensemble density functional theory to divide rigorously a complex molecular system into its parts [M.H. Cohen and A. Wasserman, J. Phys. Chem. A 111, 2229 (2007)]. The illustrative system is an analog of the hydrogen molecule for which analytic exp…
The sum-over-states (SOS) polarizabilities are calculated within the approximate independent electron theories such as the Hartree-Fock approximation and density functional models using the eigenvalues and orbitals obtained from the self-consistent solution of single-particle equations. The SOS polarizabilities are th…
BACKGROUND: Nephrogenic systemic fibrosis is a debilitating disease occurring exclusively in patients with renal failure. The aetiology of nephrogenic systemic fibrosis is unclear, but recent reports suggest that exposure to gadolinium for enhancement of magnetic resonance imaging may play a role. In the present study…
Single-walled carbon nanotube (SWNT) field effect transistors were electrochemically decorated with Pt, Pd, Au, and Ag nanoparticles. Upon exposure to 10 ppm NO gas in N2 a trend was found wherein the magnitude of electron transfer into the SWNT valence band scaled with the work function of the individual metal. This…