apparatuses , systems , and methods utilizing capillary action and to control the movement or placement of liquids or other materials in micro - devices and nano - devices . in some embodiments , the present invention may be used to control polymer addition to micro - cantilevers and nano - cantilevers for biological sensing , chemical sensing , and other sensing . in other embodiments , the present invention may be used to deliver adhesives , dielectrics , chemo resistor materials , and other materials to micro - devices and nano - devices .