TY  - JOUR
AU  - Vögl, F.
AU  - Balacescu, L.
AU  - Holderer, O.
AU  - Pasini, S.
AU  - Staringer, S.
AU  - Brandl, G.
AU  - Ossovyi, V.
AU  - Feilbach, H.
AU  - Müller-Buschbaum, P.
AU  - Stadler, A. M.
AU  - Fitter, J.
AU  - Schrader, T. E.
TI  - Multi-angle in situ dynamic light scattering at a neutron spin echo spectrometer
JO  - Review of scientific instruments
VL  - 94
IS  - 3
SN  - 0034-6748
CY  - [Erscheinungsort nicht ermittelbar]
PB  - American Institute of Physics
M1  - FZJ-2023-01740
SP  - 034106
PY  - 2023
AB  - A new sample environment, called Bio-Oven, has been built for the Neutron Spin Echo (NSE) SpectrometerJ-NSE Phoenix. It provides active temperature control and the possibility to perform Dynamic Light Scattering(DLS) measurements during the neutron measurement. DLS provides diffusion coefficients of the dissolvednanoparticles and thus one can monitor the aggregation state of the sample on a time scale of minutes duringthe spin echo measurement times on the order of days. This approach helps to validate the NSE data or toreplace the sample when its aggregation state influences the spin echo measurement results. The new Bio-Ovenis an in situ DLS setup based on optical fibers decoupling the free space optics around the sample cuvettein a lightproof casing from the laser sources and the detectors. It collects light from three scattering anglessimultaneously. Six different values of momentum transfer can be accessed by switching between two differentlaser colors. Test experiments were performed with silica nanoparticles with diameters ranging from 20 nm upto 300 nm. Their hydrodynamic radii were determined from DLS measurements and compared with the onesobtained by a commercial particle sizer. It was demonstrated that also the static light scattering signal can beprocessed and gives meaningful results. The protein sample apomyoglobin was used for a long-term test and ina first neutron measurement using the new Bio-Oven. The results prove that the aggregation state of the samplecan be followed using in situ DLS along with the neutron measurement.
LB  - PUB:(DE-HGF)16
C6  - 37012783
UR  - <Go to ISI:>//WOS:000956161100002
DO  - DOI:10.1063/5.0136367
UR  - https://juser.fz-juelich.de/record/1006599
ER  -