A patch clamp chip designed to record electrical currents in single cells.  These are typically used in ion channel drug screening studies.  One example is testing depression medications for their effect on ion channels in neurons.  Typically the ion channels are genetically grafted into a heart or kidney cell so the neuron ion channel can be used with the patch chip.  This patch chip has an inner recording chamber filled with intracellular fluid and an outer chamber filled with extracellular fluid.  A whole cell patch clamp recording can be made after the cell forms a "giga seal" with the patch chip which directs the cell currents into the intracellular chamber where the amplifier can measure the ionic currents.
Own work
Gregory Holst