Materials Literature
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Ultraviolet broad emission from 265 to 360 nm was observed in a Pr3+:Y2SiO5 crystal under pump by a 532 nm Nd:YAG laser. The two-photon simultaneous absorption process is found to be responsible for the UV emission based on the fluorescence intensity dependence on the pump power as well as the related spectroscopic an…
Zn(II)bis(1-(2-pyridylazo)-2-naphthol) (Zn(PAN) 2 ) complex nanorods have been successfully synthesized via a facile sonochemical method. The transmission electron microscopy (TEM) images showed that the products had a rod-like morphology with a diameter of about 20–70 nm and a length of about 100–300 nm. The Zn(PAN)…
Effective optical constants of stratified metal-dielectric metameterial are presented. The effective constants are determined by the two-complex reflectivity method (TCRM). The TCRM reveals the full components of the effective permittivity and permeability tensors and indicates the remarkable anisotropy of metallic an…
Nass, nass, nass: Eine Oberfläche wird vorgestellt, die als Antwort auf einen enthalpiegesteuerten Prozess zwischen stabilen superhydrophilen, metastabilen superhydrophoben und stabilen superhydrophoben Zuständen wechselt (siehe Bild). Das makroskopische Phänomen der Oberflächenbenetzbarkeit resultiert aus der kollekt…
The aim of this paper is to report the data concerning the contamination of the exhausted air from the hot cells dedicated to the large-scale synthesis of positron emission tomography (PET) radiopharmaceuticals. Two cyclotrons are currently operating in Ospedale San Raffaele for the routine production of C and F. They…
Part 1 General and introductory: introduction to the DFE/LCA life cycle assessment - a synopsis multi-lifecycle assessment - an extension of traditional LCA methodologies - design for the environment environmental laws - USA legislation and market driven requirements - European examples. Part 2 Product planning: ecode…
ZnO nanorods, grown by a hydrothermal method, have been characterized by slow positron implantation spectroscopy (SPIS) and atomic force microscopy (AFM). It has been demonstrated that such non-destructive characterization techniques can provide a comprehensive picture of the nanorod structure (including its length, s…
Abstract Biodegradable and amphiphilic diblock copolymers [polylactide‐ block ‐poly(ethylene glycol)] and triblock copolymers [polylactide‐ block ‐poly(ethylene glycol)‐ block ‐polylactide] were synthesized by the anionic ring‐opening polymerization of lactides in the presence of poly(ethylene glycol) methyl ether or…
Monodisperse tetrapod-shaped CoO nanocrystals were prepared via the alcoholysis of cobalt (III) oleate in dodecanol at high temperature. The coordinating solvent dodecanol also acts as a reducing and morphology controller reagent. The size of the obtained CoO nanotetrapods can be well tuned by variation of the amount…
Magnetic studies in bulk 57% CuxZn1−xO∕43% CuO composite prepared chemically with x=0.10 (0.03) are reported. Temperature dependence of the magnetic susceptibility shows clear signature of the Néel temperature TN≃230K for pure CuO. Hysteresis loop studies in the zero-field-cooled sample show room-temperature ferromagn…
The mechanism of energy transfer from Yb3+ to Er3+ ions has been studied in bismuth borate glasses with a serial Yb3+ concentration. The analysis of the donor fluorescence decay with a low concentration has been used to determine the multipole character of the energy transfer. The energy-transfer microparameters were…
Aqueous chemical growth (ACG) is an efficient way to generate wafer-scale and densely packed arrays of ZnO nanopillars on various substrate materials. ACG is a low-temperature growth approach that is only weakly influenced by the substrate and even allows growth on flexible polymer substrates or on conducting material…
Self-assembled hollow lipid tubules are interesting and potentially useful supramolecular structures. Here, we study the deformation of lipid tubules of 1,2-bis(tricosa-10,12-diynoyl)-sn-glycero-3-phosphocholine (DC8,9PC) trapped inside liquid droplets on glass substrates. The interface tension of the shrinking liquid…
Birefringence observations and rheological measurements were used to monitor the phase behavior of Mg/Al (the molar ratio of Mg(2+) to Al(3+) being 2:1) layered double hydroxide (LDH) suspensions. The suspensions of concentration lower than 16% (w/w) appear isotropic (I) between crossed polarizers. In contrast, the su…
The electronic structures of amorphous carbon at densities of 2.0, 2.3, 2.6, 2.9, and $3.2\phantom{\rule{0.3em}{0ex}}g∕{\mathrm{cm}}^{3}$ have been calculated using density-functional theory with different simulation parameters. The carbon networks were generated by liquid-quench method using Car-Parrinello molecular…
[Fe(bpp)2][Pt(ox)2].H2O (with bpp=2,6-bis(pyrazol-3-yl)-pyridine and ox=oxalate) was prepared, and its spin crossover behavior was characterized. The two-step spin transition behavior changes over several cycles. The original behavior is restored when the sample is allowed to relax for a week. Furthermore, the ST exhi…
The magnetocaloric effect in single crystalline Nd0.5Sr0.5MnO3 (NSMO 0.5) is investigated by computing the field dependent entropy change (ΔS) and adiabatic temperature change (ΔTad). At the charge ordering temperature (TCO), the value of ΔSmax is found to be much higher than ΔSmax reported in polycrystalline samples.…
Reduction of NO by biogas without tar and with tar was investigated. Flow reaction experiments were performed at high-temperature (≥1000 °C), and the main parameters, such as initial oxygen concentration, bulk equivalence ratio, temperature, and initial tar content, were studied. The simulated biogas was prepared by m…
Abstract Chitosan‐g‐PCL‐b‐MPEG copolymers of various compositions were successful synthesized via a protection‐graft‐deprotection procedure, by the esterification of phthaloyl‐protected chitosan (PHCS) with MPEG‐b‐PCL‐COOH, which was synthesized from MPEG and ε‐caprolactone and carboxylated by maleic anhydride. The ch…
By modifying some structural characteristics, the annealing process can have considerable effects on the optical performance of the solgel-derived ZrO2 xerogel films. Annealing at increasing temperature from 150°Cto750°C gives rise to first an increase of refractive index from 1.63 (at 633 nm) to 1.93 and then a decre…