A device is disclosed which comprises a first electrode (101), a second electrode (104) spaced from the first electrode, a switching region (102) positioned between the first electrode and the second electrode, and an intermediate region (103) positioned between the switching region and the second electrode, wherein the intermediate region is in electrical contact with the switching region and the second electrode. Preferably, the intermediate region comprises metal nanowires (105) in a polymer matrix, and the device is a memristor or a memcapacitor. In the latter case, the switching region comprises a conductive material (106) and an insulating material (107).