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- Asymmetrical flow field flow fractionation (AF4) (1)
- Capillary electrophoresis (1)
- Capillary electrophoresis (CE) (1)
- Field-flow fractionation (1)
- Glow discharge optical emission spectroscopy (1)
- Machine learning (1)
- Miniaturized AF4 channel (1)
- Nanoparticle (1)
- Nanoparticles separation asymetrical flow field flow fractionation (1)
- Nanoparticles separation capillary electrophoresis asymmetrcial flow field flow fractionation (1)
Organisationseinheit der BAM
The use of renewable energy sources, electromobility, and portable
electronics relies on lithium-ion batteries (LIBs). However, one
detrimental effect, which can result in significant performance loss,
is the corrosion of the current collectors caused by the aging
mechanisms, especially in high-energy-density batteries
Glow discharge optical emission spectroscopy (GD-OES) provides
depth profile analysis through sputtering using argon plasma, which
enables the analysis of the corrosion behavior at different depths of
the cathodes.
The successful off-line coupling of asymmetrical flow field flow fractionation (AF4) and capillary electrophoresis (CE) for Separation of nanoparticles (NPs) with different surface coatings was shown.
Two mixtures of polystyrene nanoparticles (PS-NPs) with comparable core sizes (20 nm and 50 nm) but different coatings (no coating/carboxyl-coated) were studied. Separation in either method resulted in non-baseline resolved or non-separated peaks. In contrast, two-dimensional off-line coupling of AF4 and CE resulted in clearly separated regions in their 2 D plots and can obviouly improve separation resolution.
The successful off-line coupling of asymmetrical flow field flow fractionation (AF4) and capillary electrophoresis (CE) for Separation of nanoparticles (NPs) with different surface coatings was shown.
Two mixtures of polystyrene nanoparticles (PS-NPs) with comparable core sizes (20 nm and 50 nm) but different coatings (no coating/carboxyl-coated) were studied. Separation in either method resulted in non-baseline resolved or non-separated peaks. In contrast, two-dimensional off-line coupling of AF4 and CE resulted in clearly separated regions in their 2 D plots and can obviouly improve separation resolution.
Capillary electrophoresis (CE) is an analytical technique that
separates analytes based on their electrophoretic mobility with
the use of an applied voltage.
Nanoparticles separation using CE exhibits good separation and
analysis efficiency, especially for nanoparticles smaller than 30
nm. The coupling of CE with inductively coupled plasma mass
spectrometry (ICP-MS) provides the possibility to detect
nanoparticles in the concentration range of nanograms per litre
and enables the simultaneous detection of nanoparticles and its
[1][2] ionic counter parts.
Our objective is to develop a fast and reliable separation method
for differently modified nanoparticles using capillary
electrophoresis.
Currently available separation channels for asymmetric flow
field-flow fractionation (AF4), which results in long analysis
time and solvent consumption, limits the application of AF4 in
[1} the field of nanoparticle analysis .
A miniaturized AF4 channel was introduced for the rapid
analysis of different nanoparticle samples. UV-Vis-MALS
provides the possibility to measure the particle size and molar
mass and offers a powerful tool for the investigation of
[2] separation performances of different AF4 channels .
Our objective was to develop fast and reliable separation
methods for both channels and enable a direct comparison by
the corresponding chromatographic parameters.