![]() It was demonstrated that also the static light scattering signal can be processed and gives meaningful results. ![]() Their hydrodynamic radii were determined from DLS measurements and compared with the ones obtained by a commercial particle sizer. Test experiments were performed with silica nanoparticles with diameters ranging from 20 nm up to 300 nm. Six different values of momentum transfer can be accessed by switching between two different laser colors. It collects light from three scattering angles simultaneously. ![]() The new Bio-Oven is an in situ DLS setup based on optical fibers decoupling the free space optics around the sample cuvette in a lightproof casing from the laser sources and the detectors. This approach helps to validate the NSE data or to replace the sample when its aggregation state influences the spin echo measurement results. DLS provides diffusion coefficients of the dissolved nanoparticles, and thus one can monitor the aggregation state of the sample on a time scale of minutes during the spin echo measurement times on the order of days. It provides active temperature control and the possibility to perform Dynamic Light Scattering (DLS) measurements during the neutron measurement. Schrader: Conceptualization (lead) Funding acquisition (lead) Project administration (lead) Supervision (lead) Validation (lead) Visualization (equal) Writing – original draft (equal) Writing – review & editing (lead).Ī new sample environment, called Bio-Oven, has been built for the Neutron Spin Echo (NSE) Spectrometer J-NSE Phoenix. Fitter: Conceptualization (equal) Project administration (lead) Validation (lead) Writing – review & editing (equal). Stadler: Conceptualization (equal) Funding acquisition (equal) Project administration (equal) Supervision (equal) Validation (lead) Visualization (equal) Writing – review & editing (equal). Müller-Buschbaum: Conceptualization (equal) Funding acquisition (equal) Project administration (equal) Validation (equal) Writing – review & editing (equal). Feilbach: Conceptualization (equal) Resources (equal) Writing – review & editing (equal). Ossovyi: Resources (lead) Software (equal) Writing – review & editing (supporting). Brandl: Data curation (equal) Software (lead) Writing – review & editing (equal). Staringer: Methodology (equal) Resources (lead) Writing – review & editing (supporting). Pasini: Data curation (equal) Resources (equal) Writing – review & editing (equal). Holderer: Data curation (equal) Investigation (equal) Project administration (equal) Visualization (equal) Writing – review & editing (equal). Balacescu: Data curation (lead) Formal analysis (equal) Investigation (lead) Methodology (lead) Project administration (equal) Validation (equal) Visualization (lead) Writing – original draft (lead) Writing – review & editing (equal). Vögl: Conceptualization (equal) Data curation (equal) Formal analysis (equal) Investigation (equal) Methodology (equal) Resources (equal) Software (equal) Validation (equal) Visualization (equal) Writing – original draft (equal) Writing – review & editing (equal). Forward scattering attributed to large aggregates is observed at temperatures above the cloud point for both terpolymers. By synchrotron small-angle X-ray scattering (SAXS), it was found that, ABC and BABC form elongated and spherical micelles, respectively. ![]() The results from dynamic light scattering (DLS) on dilute solutions show that the hydrodynamic radii Rh of the micelles formed by both, ABC and of BABC, increase strongly above 25 ☌, and the solutions feature a cloud point, i.e. Visual observation shows that ABC has a wider gelation region compared to BABC. Here we address an ABC triblock terpolymer and a BABC tetrablock terpolymer consisting of the hydrophilic oligo(ethylene glycol) methyl ether methacrylate with an average Mn of 300 g mol–1 (OEGMA, A), hydrophobic n-butyl methacrylate (BuMA, B), and thermoresponsive di(ethylene glycol) methyl ether methacrylate (DEGMA, C). Under the appropriate conditions, thermoresponsive polymers may form a 3D network, namely a thermoresponsive gel with the mechanical properties in the gel state strongly depending on the architecture of the polymer. The lower critical solution temperature (LCST) polymers have attracted great interest in the biomedical sectors, as they are water-soluble at room temperature, while they can form a gel at body temperature.
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