4X3B:
reference: A micro-patterned silicon chip as sample holder for macromolecular crystallography experiments with minimal background scattering., Roedig P, Vartiainen I, Duman R, Panneerselvam S, Stube N, Lorbeer O, Warmer M, Sutton G, Stuart DI, Weckert E, David C, Wagner A, Meents A, Sci Rep. 2015 May 29;5:10451. doi: 10.1038/srep10451. PMID: 26022615

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