Materials Literature
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Understanding the effects of substituents on the spectra of chlorins is essential for a wide variety of applications. Recent developments in synthetic methodology have made possible systematic studies of the properties of the chlorin macrocycle as a function of diverse types and patterns of substituents. In this paper…
High Resolution Image Download MS PowerPoint Slide The size and shape of pores is a key factor in the successful deployment of mesoporous silicas as supports for high-activity catalytic nanoparticles. Critical concerns are the accessibility of catalyst particles to reactant species, the effect of the particle−support…
Monomeric amorphous systems involving an upper azo-based layer and a lower fluorophore layer have been carefully designed to enable holographic formation of micrometric emissive photopatterns through reversible photoinduced mass migration of azoderivatives. The fluorescent patterns evidenced by NIR biphotonic excitati…
The optical absorption spectra and redox properties are presented for 24 synthetic zinc chlorins and 18 free base analogs bearing a variety of 3,13 (beta) and 5,10,15 (meso) substituents. Results are also given for a zinc and free base oxophorbine, which contain the keto-bearing isocyclic ring present in the natural p…
Dispersing particles within a semicrystalline polymer can result in remarkable impact strength improvement and opens promising routes toward super-tough materials. Although the technique is extensively employed to modify polymer properties, predicting which dispersions yield toughness remains a challenging issue. By c…
The hydrolysis of degreased cotton in formic acid has been studied in this paper. Hydrochloric acid is added as a catalyst. The crystalline index of degreased cotton decreases gradually with the increase in treatment time. The effects of the reaction temperature (from 55 to 65 °C) and reaction time (from 2 to 9 h) on…
A simple and large scale synthesis method was performed to synthesize high-purity BiFeO3 single-crystalline nanostructures in NaCl−Na2SO4 medium. The synthesis of BiFeO3 phase is limited by a very narrow range of sintering conditions, and the BiFeO3 can be obtained after a very short sintering time (20 min).
The pressure-volume-temperature equation of state of the intermetallic compound NiAl was calculated theoretically, and compared with experimental measurements. Electron ground states were calculated for NiAl in the CsCl structure, using density functional theory, and were used to predict the cold compression curve and…
Neutron resonance spectrometry (NRS) has been used to measure the temperature inside Mo samples during shock loading. The temperatures obtained were significantly higher than predicted assuming ideal hydrodynamic loading. The effect of plastic flow and non-ideal projectile behavior were assessed. Plastic flow was calc…
Single walled carbon nanotubes (SWCNTs) were synthesized using four different carbon precursors including CO, C2H5OH, CH3OH, and C2H2 on Co-Mo catalysts. Semiconducting (n,m) abundance was evaluated by a method based on a single-particle tight-binding theoretical model taking into consideration the relative photolumin…
In this paper a new approach to obtain the interface propagation speed in superconductors by means of a variationalme thod is introduced. The results of the approach proposed coincide with the numerical simulations. The hyperbolic differential equations are introduced as an extension of the modelin order to take into…
A layer-by-layer (LbL) polyelectrolyte deposition strategy is used to prepare multifunctional nanoparticles (MFNPs) with multimodal imaging capabilities. Alternating treatment of hybrid silica nanoparticles ( NP0 ) containing a luminescent [Ru(bpy) 3 ]Cl 2 core and anionic monolayer coating of the Gd−(siloxylpropyl)di…
The growth dynamics of bamboo-like multiwalled carbon nanotubes (BCNTs) via catalytic decomposition of C2H2 on Ni catalyst at 650 degrees C was observed in real time using an in situ ultrahigh vacuum transmission electron microscope. During BCNT growth, the shape of the catalyst particle changes constantly but remains…
Nanoporous gold film (NPGF) electrode was fabricated by applying multicyclic potential scans on a polished gold electrode in an electrolyte composed of ZnCl 2 and benzyl alcohol. In the cathodic potential scan, Zn was first electrodeposited on the gold electrode surface, and Au−Zn alloy was then directly formed on the…
The covalent connection of the electron acceptor C 60 to p-quinonoid pi-extended tetrathiafulvalenes (exTTFs) has allowed for the preparation of new photo- and electroactive conjugates able to act as artificial photosynthetic systems and active molecular materials in organic photovoltaics. The gain of aromaticity unde…
beta-NaYF4:Ln3+ (Ln = Eu, Tb, Yb/Er, and Yb/Tm) hexagonal microprisms with remarkably uniform morphology and size have been synthesized via a facile hydrothermal route. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy…
Nanotechnology is an emerging science involving manipulation of matter at the nanometer scale. Due to concerns over nanomaterial risks, there has been a dramatic increase in focused safety research. The present review provides a summary of these published findings, identifying areas of agreement and discordance with r…
A feasible method to synthesize NaA and NaY zeolite from stellerite, the very cheap raw material found in China, was reported in this article to reduce the cost of zeolite synthesis for the first time. After stellerite is calcined above 973 K with sodium carbonate, this natural zeolite can be slowly dissolved in alkal…
The effect of SiO2 addition on densification and grain-growth behavior of 8YSCZ/SiO2 composites was investigated using high purity 8 mol% yttria-stabilized cubic zirconia powders (8YSCZ) doped with 0, 1, 5, 10 wt% SiO2. The specimens were sintered at 1400°C for 1 hour. It was seen that the sintered density increased w…
ZnO nanocrystals embedded in SiO 2 matrix thin films were fabricated on Si (1 0 0) single crystal substrates by plasma enhanced chemical vapour deposition (PECVD) at 230 °C. Subsequently, the as-deposited samples were annealed at different temperatures ranging from 500 °C to 900 °C, respectively. The effects of anneal…