Materials Literature
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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…
We report on specific heat $({C}_{p})$, transport, Hall probe, and penetration depth measurements performed on $\text{Fe}({\text{Se}}_{0.5}{\text{Te}}_{0.5})$ single crystals $({T}_{c}\ensuremath{\sim}14\text{ }\text{K})$. The thermodynamic upper critical field ${H}_{c2}$ lines has been deduced from ${C}_{p}$ measurem…
Al-doped ZnO (AZO) films were deposited on quartz substrates by the ultrasonically assisted chemical vapour deposition technique. The undoped ZnO film was found to be subjected to a stress which increases initially up to 3% Al doping, and then a slight decrease was observed for 5% Al doping. The band gap of AZO shows…
Thermal treatments of feedstock gases (e.g., C(2)H(4)/H(2)) used during carbon nanotube (CNT) synthesis result in the formation of a complex mixture of volatile organic compounds and polycyclic aromatic hydrocarbons. Some of these are likely important CNT precursors, while others are superfluous and possibly degrade p…
The synthesis and characterization of novel SBA-15 nanostructured ceramics featuring zwitterionic surfaces have been carried out. The co-condensation route has been employed to bifunctionalize SBA-15 with amine and carboxylic acid groups. The functionalization process following a one-step route does not affect the mes…
To study the thermoelectric properties of SrTiO 3 doped with lanthanum and dysprosium, ceramic samples were prepared using the conventional solid‐state reaction method. The total doping amount was fixed at 20 mol% with different amounts of lanthanum and dysprosium contents. The X‐ray diffraction pattern suggests that…
Abstract The chemistry of Group IV metal ion (Ti IV , Zr IV and Hf IV )‐containing polyoxometalates (POMs) is presented as a sharply focused microreview, introducing an aspect of our own research. The synthesis, structure, and solid/solution state behavior of the POMs, which are prepared by the reactions of various la…
Ordered mesoporous materials (OMMs) are interesting matrixes for nanomedicine applications such as innovative drug delivery systems. Here, we compare the behavior of the widely studied SBA-15 mesoporous silica with that of the less investigated MSE (a periodic mesoporous organosilica whose silicon atoms are alternativ…
We studied by small-angle neutron scattering (SANS) the polymer chain conformation in model silica/polystyrene (PS) nanocomposites. Using the zero average contrast method, we can properly match silica signal to directly measure the form factor of a single PS chain. An important effort has been put to eliminate the sil…
We introduce an approach to the design of three-dimensional transformation optical (TO) media based on a generalized quasiconformal mapping approach. The generalized quasiconformal TO (QCTO) approach enables the design of media that can, in principle, be broadband and low loss, while controlling the propagation of wav…
Magnesium alloys may potentially be applied as biodegradable metallic materials in cardiovascular stent. However, the high corrosion rate hinders its clinical application. In this study, a new approach was adopted to control the corrosion rate by fabricating a biocompatible micro-arc oxidation/poly-L-lactic acid (MAO/…
Thick, high quality 4H-SiC epilayers have been grown in a vertical hot-wall chemical vapor deposition system at a high growth rate on (0001) 80 off-axis substrates. We discuss the use of dichlorosilane as the Si-precursor for 4H-SiC epitaxial growth as it provides the most direct decomposition route into SiCl2, which…
To obtain rapid biodegradable biomaterials, a biodegradable triblock oligomer poly(lactic acid)-poly(ethylene glycol)-poly(lactic acid) (PLA-PEG-PLA) was designed and synthesized as a soft segment of polyurethane. Then new nontoxic biodegradable polyurethanes were prepared using the same stoichiometric ratio of PLA-PE…
Chlorophenols (CPs) can be degraded by visible-light driven photocatalysis or laccase catalysis. However, previous and present studies have shown that neither of the two methods was efficient when being used individually. Low degradation rates were observed for the degradation of pentachlorophenol (PCP) by laccase-cat…
Relatively monodisperse and highly luminescent Mn(2+)-doped zinc blende ZnSe nanocrystals were synthesized in aqueous solution at 100 °C using the nucleation-doping strategy. The effects of the experimental conditions and of the ligand on the synthesis of nanocrystals were investigated systematically. It was found tha…