Figure 4From: A lab-on-a-chip for hypoxic patch clamp measurements combined with optical tweezers and spectroscopy- first investigations of single biological cellsThe CNC machined microfluidic channels on PMMA material were connected to the pump systems by manually drilled holes extended to the side faces of the microfluidic chip. The sealing was performed by 1) a cover glass placed on the channel surface, 2) drops of adhesive epoxy placed on the corners of the attached cover glass and 3) negative pressure applied through the side-holes joined to the channels.Back to article page