anderswallin.net

A test of the 8-channel 0-7 kPa microfluidic pressure controller today. We're looking through a 100x inverted microscope. There's a 2 um latex bead in a ~40 um wide channel formed between a glass coverslip and a PDMS layer. I'm hitting the keyboard to either increase or decrease the pressure in steps of +/-35 Pa which allows me to just barely keep the bead within the field of view during the 1 min video. The controller has plenty more resolution, down to about 1-2 Pa, so it should be possible to control flows down to <1 um/s. Stay tuned for more of the same later...