Bachelor Thesis

PUBDB-2020-03908

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Development of the temperature-controlled sample environment for Double Pulse Photon Correlation Spectroscopy

Striker, N. (Corresponding author)Extern* ; Gruebel, G. (Thesis advisor)DESY*

2018

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Please use a persistent id in citations: doi:10.3204/PUBDB-2020-03908

Abstract: A temperature-controlled sample environment was developed and verified for a Double Pulse Photon Correlation Spectroscopy (DPPCS) setup. Various polystyrene and ther-moresponsive Poly(N-Isopropyl Acrylamide) (pNipam) samples were characterized in Dy-namic Light Scattering (DLS) measurements. The thermoresponsive properties of the pNipam sample were investigated in a Small Angle X-Ray Scattering (SAXS) experimentat the beamline P10 of PETRA III. At q≈0.005Å$^{−1}$, an increase in scattered intensitywith increasing temperature was observed, indicating volume (radius) transition of theparticles. To verify the performance of the DPPCS setup in measuring dynamics, thepolystyrene samples were used in Single Pulse Photon Correlation Spectroscopy. Thefastest sample’s radius was determined to R$_h$= 27±3nm, which agrees well with thesize provided by the manufacturer (R= 25±4nm). The pNipam sample was measured attemperatures fromT= 20°C to 50°C both with Single and Double Pulse Photon Correla-tion Spectroscopy to verify the performance of the newly developed temperature-control. Both measurements showed the characteristic decrease of the radius at a transition temperature of T≈32°C, demonstrating reliable functionality of the temperature-controlledsample environment

Note: Bachelorarbeit, University of Hamburg, 2018

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Contributing Institute(s):

1. Coherent X-ray Scattering (FS-CXS)

Research Program(s):

1. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)

Experiment(s):

1. No specific instrument

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Database coverage:

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