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Identifier

000400139

Title

Development and optimization of a high-resolution small angle light scattering setup for rheological applications

Alternative Title

Ανάπτυξη και βελτιστοποίηση μιας υψηλής ανάλυσης οπτικής διάταξης για τη συλλογη σκεδαζόμενου φωτός σε μικρές γωνίες για ρεολογικές εφαρμογές

Author

Χατζάκης , Πέτρος

Thesis advisor

Πετεκίδης, Γεώργιος
Παπάζογλου, Δημήτριος
Φυτάς, Γεώργιος

Abstract

A high resolution Small Angle Light Scattering (SALS) setup that can be used in combination with rheology was optically designed and developed. The objective was a compact device that would cover a wider angular (2o-30o) and q vector (0.4κm-1 - 6.2κm-1) range than that typically covered by SALS and would be easily adapted as a modular accessory to commercially available rheometers. The setup was optically and mechanically designed and finally realized. It was successfully calibrated and verified for its angular performance, with a diffraction grating and a pinhole, while a novel way of correction, accounting for sample’s thickness and vignetting, was produced. Homemade analysis software was also developed to accompany the setup, having a user friendly graphic interface and various capabilities. The performance of the apparatus was evaluated by measuring and analyzing the scattering profiles of a variety of dilute colloidal suspensions with different thicknesses, particle sizes and materials and different solvents, at rest. Preliminary measurements of concentrated colloidal suspensions were also performed at rest and under oscillatory shear, to show the setup’s capabilities in combination with rheology. The setup’s ability, with the addition of an extra component, to image the sample and perform Dark Field Microscopy (DFM) or Diffusing Wave Spectroscopy (DWS) measurements, was also tested with success.

Language

English

Subject

Colloids

Κολλοειδή

Issue date

2016 -03-24

Collection

School/Department--School of Medicine--Department of Medicine--Post-graduate theses

Type of Work--Post-graduate theses

Permanent Link

https://elocus.lib.uoc.gr//dlib/e/c/0/metadata-dlib-1459492395-617031-24108.tkl