Figure 3:

(A) A macroscopic view of the assembled polymer microfluidic chip with a 4 × 9 array of rectangular X-ray windows in the COC supports, to which COC thin films are attached. Features for sample introduction are highlighted in the outermost layer of the chip, the PMMA frame. (B) Optical microscopy images of tetragonal thaumatin crystals grown directly on-chip using micro-batch crystallization as observed through the optically transparent X-ray windows in the chip. The top and bottom figures correspond to crystallization without and with seeding to control crystal size and density. The scale bar is 100 μm. (C) The chip magnetically mounted on the SMB goniometer at SSRL using a chip holder pin base. Experiments were performed at room temperature without the need for any external humidification.