Search results for "interfacial tension"

showing 3 items of 3 documents

M13_Microfluidics_for_CNT

2018

Compared to pure water, the CNT dispersion has much lower interfacial tension at the dispersion – glass interface due to the presence of SDBS surfactant. Since the behavior of microfluidic system in the confined regime is driven by liquid – solid interfacial tension, the droplet formation and droplet propagation are unstable and unpredictable.

Condensed Matter::Soft Condensed MatterPhysics::Fluid Dynamicsdroplet formationPhysics::Atomic and Molecular ClustersmicrofluidicsCNT dispersioninterfacial tension
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The apparently anomalous effects of surfactants on interfacial tension in the IBA/water system near its upper critical solution temperature

2016

We studied the effect of anionic, cationic, and nonionic surfactants on the interfacial tension between the two phases of the isobutyric acid/water system using spinning drop tensiometry. It has been found that interfacial tension decreases with increasing concentration of the surfactant in the case of sodium dodecyl sulfate (SDS) and of dodecyltrimethylammonium chloride (DTAC). However, in the case of Triton X-100 an increase of surfactant concentration leads to an increase of the interfacial tension. Such results are consistent with the upper critical solution temperature (UCST) in the presence of these surfactants: the UCST decreases with increasing SDS and DTAC concentrations while it i…

Polymers and Plastics02 engineering and technology01 natural sciencesSpinning drop tensiometry010305 fluids & plasmasIsobutyric acidSurface tensionchemistry.chemical_compoundColloid and Surface ChemistryPulmonary surfactantUpper critical solution temperature0103 physical sciencesPolymer chemistryMaterials ChemistryMoleculePhysical and Theoretical ChemistrySodium dodecyl sulfateSettore CHIM/02 - Chimica FisicaChemistryDrop (liquid)Cationic polymerizationUpper critical solution temperature (UCST)021001 nanoscience & nanotechnologyChemical engineering0210 nano-technologyInterfacial tensionColloid and Polymer Science
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Development of microfluidics for sorting of carbon nanotubes

2018

Sorting of carbon nanotubes by their chirality is the current bottleneck in the way to their broad employment based on their exceptional electronic and optical properties. Despite the extensive effort, there is no known method, which would result in really pure chirality ensembles. Previously reported sorting protocols result in enrichment rather than in sorting, alter electronic structure, and suffer from low yield. This is mostly due to the statistical approach, where the nanotubes with mixed chiralities are treated as a set. In this thesis, we propose a new sorting technique based on nanotube-by-nanotube compartmelization, characterization, and sorting in a continuously running droplet-b…

sonicationlow droplet formation frequencyspektroskopiamicrofluidicsinterfacial tensionpassive trappingTADBwater-in-oilPhysics::Fluid DynamicsSDBSerotusmenetelmätsurface tensionSpan 80rajapintailmiötcentrifugationdielectrophoresisnestefysiikkadroplet stabilitycarbon nanotubesdecanedispersiotlinkoaminenfluoresenssiultraäänilong-term stabilitypisaratlajitteludroplet-basedmikropiiritindividualizationsilinizationnear-infrared fluorescenceglass microfabricationdispersionwet etchingmetallic electrodesmikrotekniikkananoputketsorting
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