Materials Literature
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In this study CuO nanoparticles were prepared via direct thermal decomposition method using basic copper sulphates as wet chemically synthesized precursor which was calcined in air at 750?C for 2h. Samples were characterized by thermogravimetric (TG-DSC), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS),…
In the last couple of years, carbon dots have emerged as a new novel luminescent particle for applications in fluorescence and microscopy in some ways analogous to quantum dots and silicon nanocrystals/particles. As with any fluorescent label or tag, absolute fluorescence intensity, brightness, and particle photostabi…
Nickel flower-like nanostructures composed of intercrossed nanoplates have been fabricated through a one-pot polyol reduction process without any surfactant or external magnetic field, where free Ni2+ ions slowly released from a solid intermediate phase are reduced by 1,2-propanediol under basic conditions. The morpho…
More than 100 years after Ostwald postulated his step rule of stages, predictive understanding as to early crystallization stages of polymorphic materials is still premature. We studied crystallization of the polymorphic pharmaceutical acetaminophen in nanoporous glasses as a model for early stages of bulk crystalliza…
We report a fast (in 10-40 s) flame synthesis of high quality few-layered graphene/graphite films, offering the advantages of simplicity, high efficiency, energy saving, low cost and the ability to extend to continuous and mass production of graphene.
Bacteriochlorophylls—natural pigments for absorption of near-infrared (NIR) light—underlie light-absorption and energy transduction in photosynthetic bacteria. Capturing and utilizing NIR light is valuable in fields ranging from artificial photosynthesis to photomedicine (photodynamic therapy, imaging, and diagnostics…
A microporous silver-selenidostannate, namely [(Me)(2)NH(2)](0.75)[Ag(1.25)SnSe(3)], has been solvothermally synthesized in the presence of in situ-generated dimethylammonium cation. The compound possesses a three-dimensional open-framework that is flexible to cation exchange.
An unprecedented trigonal prismatic (μ(6)-C)Au(6) structure has been found in a novel gold(I)-copper(I) cluster with a hypercoordinated carbon, [CAu(6)Cu(2)(dppy)(6)](BF(4))(4); the incorporation of copper ions enhances the rigidity and integrity of the cluster and turns on the bright red solution luminescence.
The crystallisation of the nucleation agent ZrTiO4 in a low thermal-expansion lithium aluminosilicate glass-ceramics is monitored as a function of time by combining transmission electron microscopy with Ti-L2,3 X-ray absorption near-edge structure spectroscopy. The formation of liquid–liquid phase-separation droplets…
Here we discuss some of the challenges of using dimers of spheres for SERS at long wavelengths. We show that the field enhancement in the gap between two spheres scales with a local surface plasmon metric, effectively limiting the range of wavelengths for which the largest SERS enhancements can be obtained for this cl…
Well-defined 1D and 3D t-LaVO(4):Ln (Ln = Eu(3+), Dy(3+), Sm(3+)) nanocrystals with regular and uniform shapes were synthesized through a simple hydrothermal route assisted by disodium ethylenediaminetetraacetic acid (Na(2)EDTA). X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron micros…
Scanning transmission X-ray microscopy (STXM) has been used to chemically image single and multiple layers of a thermally reduced graphene oxide (r-GO) multi-layer sheet of the size of ∼1 μm and a thickness of ∼5 nm. The thickness of individual layers in the single sheet can be identified through quantitative analysis…
Group 4 metal initiators with a tetradentate bis(phenolato) ligand polymerized meso-lactide efficiently under ring-opening to give syndiotactic polylactide. L-Lactide was converted faster than rac-lactide and meso-lactide.
The gelating abilities of enantiopure, racemic, and different enantio-enriched mixtures of 12-hydroxystearic acid (12HSA) have been compared in order to clarify conflicting reports in the literature (1) concerning their ability to gelate organic liquids. Less than 1.0 wt % of optically pure (D)-12HSA was found to gela…
The present work reports the development of a new class of antibacterial soft-nanocomposites by in situ synthesis of silver nanoparticle (AgNP) within the supramolecular self-assemblies of amino acid (tryptophan/tyrosine) based amphiphilic hydrogelators. Interestingly, the nanoparticle synthesis does not require the u…
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Highly water-dispersible titanium dioxide (TiO2) nanoparticles with abundant carboxyl groups were synthesized through a ligand exchange method. Chemotherapeutic doxorubicin (DOX) was then loaded on the TiO2 nanoparticles by non-covalent complexation (TiO2/DOX) or covalent conjugation (TiO2-DOX). The cytotoxicity, cell…
The upcoming need of concrete structures designed against impulsive loading such impact requires analytical treatments comparable to those existing for structures under static loading in spite of a poor state of knowledge of material behaviour in this range of loading. This paper first presents basic relations and emp…
Four oxide/Zn2SnO4 composites (WO3/Zn2SnO4, TiO2/Zn2SnO4, α-Fe2O3/Zn2SnO4 and SnO2/Zn2SnO4) were synthesized via a sol–gel route with the molar ratio 4 : 1 of (W, Ti, Fe and Sn)/Zn. All composites present similar absorption characteristics to their one component (oxide or Zn2SnO4). The surface photovoltage spectroscop…
Zirconia has found wide application in dentistry because of its high mechanical strength and superior esthetic properties. However, zirconia degradation caused by phase transformation occurring in a hydrothermal environment is of concern. In the present study, phase transformation and microstructure of tetragonal zirc…