IFE Brage (Institute for Energy Technology)
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997 research outputs found
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Floating photovoltaics: modelled and experimental operating temperatures and the impact of wind speed and direction
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Induced polarization in the transient electromagnetic method for detection of subsurface ice on Earth, Mars, and the Moon
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Initial stages of water absorption on CeO<inf>2</inf> surfaces at very low temperatures for understanding anti-icing coatings
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Design of multi-luminescent silica-based nanoparticles for the detection of liquid organic compounds
Full text linkTracer testing in reservoir formations is utilised to determine residual oil saturation as part of optimum hydrocarbon production. Here, we present a novel detection method of liquid organic compounds by monodisperse SiO2 nanoparticles (NPs) containing two luminophores, a EuIII:EDTA complex and a newly synthesised fluorophore based on the organic boron-dipyrromethene (BODIPY)-moiety. The particles exhibited stable EuIII PL emission intensity with a long lifetime in aqueous dispersion. The fluorescence of the BODIPY was also preserved in the aqueous environment. The ratiometric PL detection technique was demonstrated by using toluene and 1-octanol as model compounds of crude oil. The optimal synthesis conditions were found to give NPs with a diameter of ~100 nm, which is suitable for transport through porous oil reservoir structures. The cytotoxicity of the NPs was confirmed to be very low for human lung cell and fish cell lines. These findings demonstrate the potential of the NPs to replace the hazardous chemicals used to estimate the residual oil saturation. Moreover, the ratiometric PL detection technique is anticipated to be of benefit in other fields, such as biotechnology, medical diagnostics, and environmental monitoring, where a reliable and safe detection of a liquid organic phase is needed.Design of multi-luminescent silica-based nanoparticles for the detection of liquid organic compoundspublishedVersio
