The saturation vapour pressure of {x BF3 + (1−x)n-C4H10} has been measured at 195.49 K. The system shows large positive deviations from Raoult’s law and liquid–liquid immiscibility over a wide composition range whose limits have been estimated as 0.39±0.03 < x > 0.9785. The excess molar Gibbs energies (Gm) have been calculated as a function of composition from the vapour pressure data. For the ...

RESUMEN En este trabajo se presenta un estudio comparativo del decorado de nanopartículas SiO2 (NPs SiO2) con NPs Ag mediante dos métodos diferentes: fotodeposición y agitación. fueron sintetizadas por el método Stöber. proceso evaluaron tres tiempos exposición (30, 60 90 min) a láser emisión en 532 nm manteniendo la concentración nitrato plata (AgNO3) constante 2.5 mM. agitación estudiaron mue...

Nowadays, oil companies employ nanofluid flooding to increase production from reservoirs. Herein the present work, a multiphase flow in porous media was used simulate extraction three-dimensional medium filled with oil. Interestingly, finite element method solve nonlinear partial differential equations of continuity, energy, Darcy’s law, and transport nanoparticles (NPs). The proposed model nan...

We describe an in situ facile synthetic approach to prepare carbon quantum dot (CQD) fluorescent markers (FMs) for polyethylene (PE) the presence of agglomerated silica nanoparticles (SiO2 NPs) under mild reaction conditions. First SiO2 NPs, prepared by Stöber method, were dispersed toluene. This dispersion was added a PE solution After heating (either air or Ar) mixture obtained. drying, films...

Transformations of chemical species formed by the reaction of gaseous BF3 with high pressure and silica preheated at 473 and 1093 K were studied with the use of infrared absorption spectrometry. The species containing -BF2 and the species containing >BF were transformed to each other on the highly-reacted silica depending on the pressure of BF3 in cell, and some of the species containing -BF2 w...

Surface-enhanced Raman scattering (SERS) effect is quite preferred to detect trace pollutants, and reusable SERS substrate is of important practical value. In this research, a kind of effective SiO2 nanorods (NRs)@ Au nanoparticles (NPs) substrate was fabricated completely with physical methods, and it was quite sensitive so that 1 × 10(-6) M monochlorobiphenyl (CB) could be detected. Furthermo...

Optical properties of InGaN/GaN multi-quantum-well (MQW) structures with a nanolayer of Ag/SiO2 nanoparticle (NP) on top were studied. Modeling and optical absorption (OA) measurements prove that the NPs form localized surface plasmons (LSP) structure with a broad OA band peaked near 440-460 nm and the fringe electric field extending down to about 10 nm into the GaN layer. The presence of this ...

In this work we demonstrate that Medium Energy Ion Scattering (MEIS) measurements in combination with Transmission Electron Microscopy (TEM) or Grazing Incidence Small Angle X-Ray Scattering (GISAXS) can provide a complete characterization of nanoparticle (NP) systems embedded into dielectric films. This includes the determination of the nanoparticle characteristics (location, size distribution...

The use of a molecular gold organometallic cluster in chemical vapour deposition is reported, and it is utilized, together with a tungsten oxide precursor, for the single-step co-deposition of (nanostructured) tungsten oxide supported gold nanoparticles (NPs). The deposited gold-NP and tungsten oxide supported gold-NP are highly active catalysts for benzyl alcohol oxidation; both show higher ac...