Materials Literature
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Abstract A X‐ray photoelectron spectroscopy (XPS) of valence band (VB) and core levels are performed for a SiO 2 /p‐Si heterostructure containing a thin oxide layer of d = 20 nm thickness and implanted by Si + ions. With an implantation energy of 12 keV the maximum density of the implanted Si + profile is located clos…
Single-walled carbon nanotubes (SWCNTs) are widely used in industrial and medical sectors, and the increasing exposure of SWCNTs necessitates the studies of their potential environmental and health effects. Considerable efforts have been made to improve the dispersion of SWCNTs by chemical modifications. However, the…
Although conventional earthquake-resisting structural systems provide adequate life safety when properly designed, they rely on significant structural damage to dissipate the seismic energy. This structural damage and the residual drift that may result from the inelastic response can make a building difficult, if not…
Abstract The nanoscopic structure of thermoresponsive dendronized polymers below the critical aggregation temperature ( T C ) is revealed by CW EPR spectroscopy. At temperatures far below T C , the water‐swollen polymers start to dehydrate and hydrophobic cavities are formed. Two different dehydration processes can be…
A neutron powder diffraction study of ${\mathrm{EuFe}}_{2}{\mathrm{P}}_{2}$ at a wavelength of 2.3672(1) \AA{} shows that the 6.6(3) ${\ensuremath{\mu}}_{B}$ Eu${}^{2+}$ moments order ferromagnetically at ${T}_{C}=30(1)$ K and are canted at an angle of 17(3)${}^{\ifmmode^\circ\else\textdegree\fi{}}$ from the $c$ axis.…
Ceria nanoparticles have attracted a great deal of concern about their impact on human health and the environment due to their widespread applications. In the present work, different exposure media (normal saline and phosphate-buffered saline [PBS]) were used to adjust the surface charge density in order to investigat…
Fluctuations of the local volume fraction within granular materials have previously been observed to decrease as the system approaches jamming. We experimentally examine the role of boundary conditions and interparticle friction μ on this relationship for a dense granular material of bidisperse particles driven under…
Structural phase-controlled formation of binary Co(2)P and CoP nanocrystals is achieved by reacting cobalt(II) oleate with trioctylphosphine. In the absence of oleylamine, Co(2)P nanowires are formed at both 290 and 320 °C. In the presence of oleylamine, Co(2)P nanorods are formed at 290 °C, and CoP nanorods are forme…
Abstract Reactive blending of functionalized polyethylenes (PE) and polyamides (PA) is performed by carefully choosing extrusion conditions and polymeric materials in order to obtain two types of stable morphologies. The first blend type yields a co‐continuous morphology and the second type a dispersion of sub‐micron…
This mini-review describes recent progress (2009-2010) in the field of silica-based monolith with special emphasis on the preparation, characterization and applications.
The propagation of surface plasmons along rough metal surfaces is investigated with transformation optics. The roughness is modeled on a nanometer scale either by partly embedding a cylinder of metal into the surface (convex rough surface) or by excavating a cylindrical cavity from it (concave rough surface). These tw…
Using calculations from first principles, we demonstrate that intrinsic carrier-phonon scattering in bilayer graphene is dominated by low-energy acoustic (and acousticlike) phonon modes in a framework that bears more resemblance to bulk graphite than to monolayer graphene. The total scattering rate at low to moderate…
We present a novel method to fabricate complete and highly oriented anodic titanium oxide (ATO) nano-porous structures with uniform and parallel nanochannels. ATO nano-porous structures are fabricated by anodizing a Ti-foil in two different organic viscous electrolytes at room temperature using a two-step anodizing me…
Bottom-up fabrication of self-assembled nanomaterials requires control over forces and interactions between building blocks. We report here on the formation and architecture of supramolecular structures constructed from two different peptide amphiphiles. Inclusion of four alanines between a 16-mer peptide and a 16 car…
A biomass-based activated carbon, utilized for direct carbon fuel cells (DCFCs), is prepared from bamboo scraps under different activation temperatures, activation times, and impregnation ratios. The K 2 CO 3 is employed as the activating agent, while the activated carbon is treated in HNO 3 solution for the purpose o…
Biopreservation by saccharides is a widely studied issue due to its scientific and technological importance; in particular, ternary amorphous protein-saccharide-water systems are extensively exploited to model the characteristics of the in vivo biopreservation process. We present here a differential scanning calorimet…
The effects of hydrothermal and thermal treatments on surface oxygen functionalization of single-wall carbon nanotubes (SWNTs) were quantitatively investigated by means of water adsorption/desorption, temperature-programmed desorption (TPD), Raman spectroscopy, thermogravimetric analysis, and nitrogen porosimetry. SWN…
2,5-Bis(triphenylsilylethynyl)-3,4-diphenylsiloles with different 1,1-substituents [XYSi(CPh)(2) (C-C≡C-SiPh(3))(2)] (Ph=phenyl) were synthesized in high yields by the Sonogashira coupling of 2,5-dibromo-3,4-diphenylsiloles with triphenylsilylacetylene, and two of these were characterized crystallographically. Crystal…
A laminate of a composite was developed from Kevlar 29-ramie fiber reinforced by polyester resin for hard body armor. The focused given to the ballistic limit, maximum energy absorption, composite failure mode, lifetime rupture, target geometry and environmental effects. The results indicated that the maximum ballisti…
Due to difficulties in tracing engineered nanoparticles (ENPs) in complex media, there are few data on the exposure of soil biota to ENPs. This study used neutron activated cobalt (Co NPs) and silver (Ag NPs) nanoparticles, as well as soluble cobalt and silver salts, to assess the uptake, excretion and biodistribution…