Figure 3
Optical anisotropy of LSTA-produced structures. (a) Locally observed extinction spectra of LSTA-produced structures and natural drying-produced structures (a reference spectrum of the parent diporphyrin solution is shown in Supplementary Figure S3). Both of the extinction spectra were averaged at three different positions. (b) Extinction spectra of an LSTA-produced structure and natural drying-produced structures recorded under various polarisation conditions. (c) Optical transmission images of LSTA-produced structures recorded under various polarisation conditions of white light. The length of the scale bars is 20 µm. In the top figure, the shape of a LSTA-produced structure was approximated with a triangle, and shows the polarisation angles for lowest and highest extinction.
