Novel polymer sample holder The polymer carrier is mounted in a sample holder. Researchers from the SNI network have developed and tested The 2 x 2 cm2 membrane contains 26,000 pyrami- a new type of polymer sample holder that is ideal for studying dal cavities. The inset shows protein microcrystals aligned within the 100 µm sized cavities (black-and- crystals at synchrotron and X-ray free-electron laser sources. white image). (Image: Paul Scherrer Institute) The crystals are applied to the transparent microstructured polymer membrane of the sample holder, allowing their posi- tion to be precisely determined prior to analysis. This work lays the foundation for developing a process for low-cost mass pro- duction of the sample holder. Original publication: https://journals.iucr.org/m/issues/2023/06/00/ zf5021/ 28 SNI Annual Report 2023