Method of actuating and an actuator

摘要

A method of actuating, comprising: filling at least a portion of a tube ( 21 ) with a liquid ( 19 ) containing electrolytes, the tube ( 21 ) having an inner surface that is electrically chargeable when in contact with the liquid ( 19 ); positioning an object ( 28 ) in fluid communication with the liquid in the tube; and applying an electrical field ( 46 ) along a lengthwise axis across the tube at said portion for producing a pressure in the liquid. The pressure in the liquid exerts a force on the object so as to actuate the object ( 28, 30 ). An actuator ( 20 ) is also disclosed.