Optical microscope images were collected using a Nikon Eclipse LV100 microscope at 5x magnification unless otherwise stated. Images were collected under polarised light. Solutions were made as described in Section 1.3. and transferred to a microscope slide by a cut plastic Pasteur pipette or by scooping for imaging. The plastic Pasteur pipette was cut to widen the pipette to try and reduce any shearing. Scale bars were added to images using the software ImageJ.