Figure S-1. (a) Photograph of a second type of chip holder, consisting of two top plates and two bottom plates. (b) Schematic demonstrating the interfacing of a capillary to a microfluidic chip via a chip holder. The capillary is held by a ferrule that covers an access hole of the chip, while a PEEK nut is screwed into the chip holder to seal the ferrule against the chip.

Context in source publication

Context 1

... two top plates were loosely screwed to the bottom plate, and the chip was aligned such that the positions of the access holes matched the holes of the top plates, before the screws were tightened to fix the chip in place. An alternative chip holder was occasionally used that featured two bottom plates rather than a single plate (Figure S-1a). There was no difference in performance between the two types of chip holder design. ...