"Microcanals" for micropipette access to single cells in microfluidic environments.

We demonstrate the fabrication and operation of "microcanals"(i.e. open-air microfluidic channels without a roof), which enable micropipette manipulation and probing of cells within a microfluidic environment. The microcanal devices are fabricated in PDMS on glass substrates using a PDMS membrane transferring technique. Here we show patch-clamp electrophysiological recording and intracellular dye injection performed on cells seeded in microcanals.