Decades ago, people dreamt about the miniaturization of devices. Everyone wanted to have a portable phone, music player, or even a TV. Currently, we are much further than that. Scientists miniaturize even sensors dedicated to medical diagnostics, so only tiny compartments are needed instead of the whole room of equipment to perform some analyses. Recently, scientists from the Institute of the Physical Chemistry, Polish Academy of Sciences, presented a unique lab on the chip system based on microelectrodes, where the diagnostics occur thanks to the laser beam and electrodes. Moreover, due to the unique combination of the geometry of the platform for hosting sample, it is possible to detect chemicals even in a sub-milliliter droplet.