QELS

AcronymDefinition
QELSQuantum Electronics and Laser Science
QELSQuasi Elastic Light Scattering
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References in periodicals archive ?
In this work, we study the effect of concentration and length scale of polycaprolactone (PCL) on droplets of [C.sub.12][E.sub.5]/water/decane by QELS and small angel X-ray scattering (SAXS).
QELS measurements were performed using an ALV single-detector version compact goniometer system, from ALV-GmbH, Langen, Germany.
A study with QELS shows that the mixture of [C.sub.12]- polyethylene oxide- (PEO-) C12with [C.sub.12][E.sub.5] microemulsion induces a network between nanodroplets at [C.sub.12][E.sub.5] microemulsion that it is found that the increase of [C.sub.12]-PEO-[C.sub.12] can produce fast and slow motions (collective diffusion coefficient) in the microemulsion [21], and the origin of those motions comes from connected and nonconnected nanodroplets inside the [C.sub.12]-PEO-[C.sub.12]/[C.sub.12][E.sub.5] microemulsion.
The studied depletion effect with QELS shows that the depletion effect can show one single motion (collective diffusion coefficient) and with increase of PEG concentration the collective diffusion is decreasing [24, 25].
The size of Ag nanoparticles were confirmed as (5-20 nm) through quasi elastic light scattering (QELS) technique (Figure-5).
We used either ~120 g/L suspensions of 154-nm polystyrene colloidal particles with a polydispersity of 5% or an -50 g/L suspension of 95-nm particles with a polydispersity of 7% (QELS measurements).
In addition to state-of-the-art machines for solid-state and conventional NMR, gel permeation chromatography (GPC), quasi-elastic light scattering (QELS) and x-ray structural studies, the department has recently acquired a scanning tunneling (STM) and atomic force microscope (AFM) capable of atomic resolution.