Materials Literature
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Tm 3+ -, Tb 3+ - and Eu 3+ -doped ZrO 2 nanocrystals were prepared by a facile precipitation method with a hydrothermal process. Structural characterization showed a crystallite size ranging from 30 to 40 nm, and monoclinic and tetragonal zirconia phases were observed depending on the dopant concentration. The monocli…
Abstract Ultra‐thin free‐standing nanoporous gold leaf made by dealloying exhibits excellent electrocatalytic activities toward nitrite oxidation. The electrochemical responses of nitrite ions on this novel nano‐electrode is found not dependent on pH over a wide range from 4.5 to 8.0, which is markedly different from…
The goal of this study was to generate porous scaffolds from the genetically engineered protein, an analogue of Nephila clavipes spidroin 1 (rS1/9) and to assess the properties of new rS1/9 scaffolds essential for bioengineering. The salt leaching technique was used to make the rS1/9 scaffolds of interconnected macrop…
We consider a one-dimensional (1D) superlattice (SL) on graphene consisting of very high and very thin (δ-function) magnetic and potential barriers with zero average potential and zero magnetic field. We calculate the energy spectrum analytically, study it in different limiting cases, and determine the condition under…
The effects of ZnO on longitudinal and transverse ultrasonic wave velocities of soda lime silicate (SLS) glasses have been measured using the pulse-echo method at 5 MHz frequency at room temperature. The elastic properties: Longitudinal modulus, shear modulus, Young's modulus, bulk modulus, Poisson's ratio, and Debye…
On the surface of it: Experimental and computational analyses for a hybrid peptide–substrate system showed that changing the position of a proline residue in synthetic peptides changes their adsorption onto semiconductors substantially and predictably (see picture with a Si(100) surface). Such information is essential…
We study single wall carbon nanotubes (SWNTs) deposited on quartz. Their Raman spectrum depends on the tube-substrate morphology, and in some cases, it shows that the same SWNT-on-quartz system exhibits a mixture of semiconductor and metal behavior, depending on the orientation between the tube and the substrate. We a…
Spherulitic crystals are found in association with many materials and diseases, but the fundamental formation mechanism is not well understood. Using maleic chitosan to control CaCO 3 crystallization, we have discovered a two-stage process that produces biomimetic CaCO 3 spherulites. First, amorphous calcium carbonate…
We explored the size-dependent impairment of cognition in mice caused by the injection of gold nanoparticles (GNPs). GNPs of 17 and 37 nm in diameter were injected intraperitoneally into BALB/c mice at doses ranging from 0.5 to 14.6 mg kg( - 1). ICP-MS was performed on brain tissue collected 1, 14 and 21 days after th…
Long alkyl groups are used in many functional polymers to improve their performance. The methylene sequences usually show a strong tendency to aggregate to form small alkyl nanodomains which can be either completely amorphous or partly crystalline. The influence of main chain packing, domain size, and density on the p…
In recent years there has been a growing interest in the application of X-ray scattering techniques to biomolecules in solution. At NSLS, a new undulator-based beamline, X9, has been constructed to address the oversubscribed user demand for X-ray scattering. Beamline X9 has the capability to perform small/wide-angle X…
Bubbles grow by the rectified diffusion process in an acoustic field. While there is a thorough understanding of this process for the air−water system, only limited experimental data is available in the literature for aqueous solutions containing surfactants. In order to expand the experimental database, we have deter…
This study investigates the adsorption and reactions of H(2)O(2) on TiO(2) anatase (101) and rutile (110) surfaces by first-principles calculations based on the density functional theory in conjunction with the projected augmented wave approach, using PW91, PBE, and revPBE functionals. Adsorption mechanisms of H(2)O(2…
Highly textured Ti 3 SiC 2 ceramic was successfully fabricated by slip casting in a 12 T strong magnetic field followed by spark plasma sintering. The optimized suspension parameters for slip casting were determined as 20 vol% Ti 3 SiC 2 and 1.5 wt% polyethyleneimine dispersant of powder in deionized water. After text…
A detailed investigation of resonance-continuum coupling is carried out both experimentally and theoretically in metamaterials based on high-permittivity dielectric subwavelength resonators. An original experimental scheme is designed at microwave frequencies, which mimics a periodic array of resonators. Fano resonanc…
The effect of calcination temperatures on dry reforming catalysts supported on high surface area alumina Ni/γ-Al2O3 (SA-6175) was studied experimentally. In this study, the prepared catalyst was tested in a micro tubular reactor using temperature ranges of 500, 600, 700 and 800 °C at atmospheric pressure, using a tota…
The high-pressure behavior of polyiodides confined into the hollow core of single-walled carbon nanotubes organized into bundles has been studied by means of Raman spectroscopy. Several regimes of the structural properties are observed for the nanotubes and the polyiodides under pressure. Raman responses of both compo…
Abstract This paper reports the qualitative analysis and quantitative detection of polycyclic aromatic hydrocarbon (PAH) molecules with per‐6‐deoxy‐(6‐thio)‐β‐cyclodextrin (CD‐SH) modified gold nanoparticles (AuNPs) by surface‐enhanced Raman scattering (SERS) spectroscopy. For the selective sensing of PAHs, which are…
We report on the fabrication and characterization of plasmonic structures on flexible substrates (Metaflex) and demonstrate the optical properties of a single layer of Metaflex. The layer exhibits a plasmonic resonance in the visible region around 620 nm. We show experimental and numerical results for both nano-antenn…
Ce3+-doped YAG garnet optical ceramic have been sintered at the Shanghai Institute of Ceramics in China to characterize dopant distribution in optical ceramics by combining optical spectroscopy and two spatially resolved techniques as imaging confocal microscopy and transmission electron microscopy. A strong Ce3+ segr…