Materials Literature
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Cobalt nanoparticles were synthesised via the thermal decomposition of Co2(CO)8 and were coated in iron oxide using Fe(CO)5. While previous work focused on the subsequent thermal alloying of these nanoparticles, this study fully elucidates their composition and core@shell structure. State-of-the-art electron microscop…
We present an innovative approach to the production of sub-100 nm hollow Au-SnO2 hybrid nanospheres, employing a low-cost, surfactant-free and environmentally friendly solution-based route. The hollow hybrid nanostructures were synthesized using a seed-mediated hydrothermal method, which can be divided into two stages…
We report an experimental method to investigate droplet dynamics in centrifuged emulsions and its application to study droplet compression and coalescence. The experimental setup permits in situ monitoring of an ensemble of droplets in a centrifuged monolayer of monodisperse emulsion droplets using optical microscopy.…
Composite materials with well-designed structures have been extensively explored to enhance their sensing performances. Here, through a simple “top-down” chemical etching approach, Cu2O–CuO composite microframes were fabricated with many nanometer-sized branch-like nanorods distributed on the surfaces and edges. The s…
A one-pot metathesis reaction between trimesic acid sodium salt and Cu(NO3)2 to yield [Cu3(BTC)2] (HKUST-1) in moderate to good yields, even at room temperature (r.t.) is presented, herein, for the first time. To determine if the basic nature of the metathesis reaction afforded any new physicochemical properties to HK…
We report a novel strategy for the enhancement of photocatalytic H2 evolution by doping La into the depletion layer of Cd0.6Zn0.4S (CZS: x% La). The apparent quantum yield of the CZS: 2% La photocatalyst at 350 nm is up to 93.3%, which is extremely high for solar water splitting even compared with the noble metal coca…
Two novel bridged benzoxazole-based benzoxazine monomers, HOH-a and FOH-a, were synthesized using a non-solvent method. The structure of HOH-a and FOH-a was confirmed by Fourier transform infrared spectroscopy (FTIR), 1H NMR, and elemental analysis. The curing behaviors of these two monomers were studied by differenti…
In order to explain the reduced photodynamic (PDT) activity of a recently proposed m-tetra (hydroxyphenyl) porphycene derivative (temocene or THPPo) in terms of singlet oxygen quantum yields compared to porphyrin analogue Foscan (m-THPC), a time dependent DFT investigation has been carried out. Computed electronic tra…
We report the design and synthesis of a far-red/near-infrared (FR/NIR) fluorescent conjugated polymer, PFDBT-POSS, bearing poly{[9,9-di(hexyl)fluorene]-alt-co-[4,7-bis(thiophen-2-yl)-2,1,3-benzothiazole]} (PFDBT) as the backbone and bulky polyhedral oligomeric silsesquioxane (POSS) as side chains. PFDBT-POSS based nan…
The atomic scale structure and its dependence on Pt concentration of a Pt-doped SnO2 (Pt-SnO2) thin film produced by a sputter-deposition method was investigated, which showed high-performance as a methane gas sensor. Extended X-ray absorption fine structure (EXAFS) and X-ray diffraction (XRD) analyses showed that Pt-…
To minimize the aggregation and size effects of nanoscale zerovalent iron (nZVI), nZVI/boron nitride nanosheets (BNNSs) composites were fabricated via a one pot “autoclave route” on a gram-scale. BNNSs (1–6 nm) supported nZVI (4–40 nm) was prepared by heating NaBH4, FeCl3 and NaN3 at 400 °C. The BNNSs matrixes benefit…
In this study, we report a rapid and simple technique for obtaining cobalt aluminate having a spinel structure. The products were prepared from a hydroxide precursor synthesized by coprecipitation of cobalt (Co(2+)) and aluminum (Al(3+)) nitrates with an alkaline solution. The chosen precursor enabled low temperature…
OBJECTIVES: This study evaluated the antibacterial effect and mechanical properties of composite resins (LCR, MCR, HCR) incorporating chitosan with three different molecular weights (L, Low; M, Medium; H, High). MATERIALS AND METHODS: Streptococcus (S). mutans 100 mL and each chitosan powder were inoculated in sterili…
Large differences are found in the quality of crystal structures obtained from different diffraction methods. The most accurate studies identify all atomic sites, including hydrogens, while others lack even the resolution needed to locate individual atoms. The gauge including projector augmented wave method (GIPAW) pr…
A reliable nanocasting method has been developed to synthesize mesoporous hybrids of platinum (Pt) nanoparticles decorating tungsten trioxide (WO3). The process began with modification of the SBA-15 template with carbon polymers and Pt nanoparticles accompanied by adsorption of W(6+), which was then converted into m-P…
We investigate the time-dependent rheology and slip behaviour of colloidal gels formed under polymer-induced depletion attraction. The shape of the flow curves at low applied shear rates is suggestive of slip, which we confirm using confocal imaging. Time-dependent linear viscoelastic measurements show an unexpected d…
The free-radical photoinduced thiol–ene reaction between D-limonene, as renewable diolefinic substrate, and two mono-/tri-functional thiols (iso-tridecyl 3-mercaptopropionate and trimethylolpropane tris(3-mercaptopropionate)), has been investigated kinetically to define a relationship between alkene structure and reac…
A new mesoporous Cu-MPTA-1 nanocatalyst has been synthesized via a simple and facile in situ radical polymerization of triallylamine in the presence of an organic–organic self-assembly of anionic surfactant SDS, followed by grafting of Cu(II) at room temperature under an inert atmosphere. This nanomaterial has been ch…
In this article, we demonstrate novel mesoporous Au-loaded TiO2 nanoparticle assemblies (Au–MTA) as high-effective catalysts for the selective transformation of nitroaromatics into the corresponding aryl amine products. These materials feature a three-dimensional open porous structure consisting of interconnected unif…
A new fluorophore based on guanidine substituted 1,8-naphthalimide was synthesized and characterized. In aqueous solution, the guanidine group undergoes deprotonation/protonation with a pKa of ∼8.5 in the ground-state and ∼0.9 in the excited-state. The emission of its protonated and deprotonated forms exhibits a large…