Materials Literature
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We demonstrate that polyelectrolyte multilayer film (PEM) systems constructed using layer-by-layer (LbL) assembly of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) exhibit significant swelling/deswelling hysteresis in humid air environments, swelling less upon absorption of water from a dry state th…
A significant reduction in the electrical percolation threshold is achieved by locking carbon nanotubes (CNTs) in a predominantly hexagonally close-packed (HCP) colloidal crystal lattice of partially plasticized latex particles. Contrary to other widely used latex processing where CNTs are randomly distributed within…
In this research, we studied solvent effects on the relative energies, dipole moment values, and structural properties of water, methanol, ethanol, and mixtures of them surrounding single-walled carbon nanotubes (SWCNT), by using molecular dynamics simulation. Calculations were carried out with the Hyper Chem program.…
BACKGROUND: During the last years, (19)F-MRI and perfluorocarbon nanoemulsion (PFC) emerged as a powerful contrast agent based MRI methodology to track cells and to visualize inflammation. We applied this new modality to visualize deep tissue abscesses during acute and chronic phase of inflammation caused by Staphyloc…
A simple method for the controlled growth of novel reduced graphene oxide/carbon nanowire (rGO/CNW) composites is developed. Without any additional carbon precursor, the graphene oxide itself serves as the only carbon source. As a proof-of-concept, the chemical sensor based on the parallel rGO/CNW micropatterns is dem…
The jamming of bidisperse soft core disks is considered, using a variety of different protocols to produce the jammed state. In agreement with other works, we find that cooling and compression can lead to a broad range of jamming packing fractions ϕ{J}, depending on cooling rate and initial configuration; the larger t…
We achieve direct electrical readout of the wavelength and polarization dependence of the plasmon resonance in individual gold nanogap antennas by positioning a graphene nanoconstriction within the gap as a localized photodetector. The polarization sensitivities can be as large as 99%, while the plasmon-induced photoc…
The influence of insertion of an ultra-thin NiO layer between the MgO barrier and ferromagnetic electrode in magnetic tunnel junctions has been investigated by measuring the tunneling magnetoresistance and the X-ray magnetic circular dichroism (XMCD). The magnetoresistance shows a high asymmetry with respect to bias v…
CeO 2 as one of the most promising oxidation catalysts has attracted much attention because of its superior performance. The extent of oxidation properties is controlled by the ratio of Ce 3+ /Ce 4+, particle size, and surface area. Here, a facile low-temperature aqueous solution-based chemical route for the synthesis…
INTRODUCTION: High-performance drug delivery systems are always made through assembly and hybridization of multiple components, each of which possesses its own role within the unified delivery function. The layer-by-layer (LbL) adsorption technique offers huge freedom in material selection and flexibility of structura…
We have performed quantum molecular-dynamics simulations for methane under shock compressions up to 80 GPa. We obtain good agreement with available experimental data for the principal Hugoniot, derived from the equation of state. A systematic study of the optical conductivity spectra, one-particle density of states, a…
The interaction of optical vortices (or phase singularities, screw dislocations) with ordinary matter is treated with simple approach. Using total internal reflection phenomenon and superposition of four plane waves incident on a material with refractive index lower than the original propagating medium, we are able to…
Oxides RNiO3 (R = rare-earth, R ≠ La) exhibit a metal-insulator (MI) transition at a temperature TMI and an antiferromagnetic (AF) transition at TN. Specific heat (CP) and anelastic spectroscopy measurements were performed in samples of Nd1−xEuxNiO3, 0 ≤ x ≤ 0.35. For x = 0, a peak in CP is observed upon cooling and w…
Vertically aligned carbon nanotube (CNT) 'forest' microstructures fabricated by chemical vapor deposition (CVD) using patterned catalyst films typically have a low CNT density per unit area. As a result, CNT forests have poor bulk properties and are too fragile for integration with microfabrication processing. We intr…
We report a self-recognition phenomenon based on an assembly process in a homogeneous dilute aqueous solution of two nano-scaled, spherical polyprotic metal oxide-based macroions (neutral species in crystals), also called Keplerates of the type [(linker)₃₀(pentagon)₁₂]≡[{M(H₂O)}₃₀{(Mo)Mo₅}₁₂] where M is Fe(III) or Cr(…
We have demonstrated a one-step and effective electrochemical method to synthesize graphene/MnO2 nanowall hybrids (GMHs). Graphene oxide (GO) was electrochemically reduced to graphene (GN), accompanied by the simultaneous formation of MnO2 with a nanowall morphology via cathodic electrochemical deposition. The morphol…
A fluorometric sensor for detection and identification of biogenic amines with carboxylic acid modified tetraphenylethenes (TPEs) based on aggregation-induced emission (AIE) is reported. A mixture of the carboxylic acid substituted TPE and biogenic amines displayed a blue emission on aggregation, which serves as a "tu…
Catching a glimpse: Electrospray ionization mass spectrometry (ESI-MS) allows monitoring of the real-time, “in-solution” formation of an organic–inorganic polyoxometalate hybrid system (see picture). This has provided insight into the rearrangement involved in the formation of the manganese-Anderson cluster coordinate…
Iron oxides supported on TiO 2 catalysts show good activity in selective catalytic reduction (SCR) of NOx by ammonia. In this work, Fe 2 (SO 4 ) 3 /TiO 2 and other catalysts containing iron and sulfates were prepared by the impregnation method, and their activities for SCR of NOx by ammonia were investigated. On Fe 2…
In this Letter, we demonstrate the first use of carbon nanoparticles (CNPs) obtained from carbon soot by lighting a candle as a cheap, effective fluorescent sensing platform for Ag(+) detection with a detection limit as low as 500 pM and high selectivity. We further demonstrate its practical application to detect Ag(+…