Figure 6. LC-on-OFET sensory devices with a thin PET film skin (thickness = 100 μm).

(a) Device structure (left) and photograph (photograph - top view). (b) Change of drain current (I_D) as a function of time upon applying nitrogen gas flows to the surface of the PET skin placed on the LC (5CB) layer (The nitrogen gas applying time was fixed as 15 s). Note that the minus (−) sign in I_D was omitted to avoid crowding data display. The inset photograph shows the PET film used as the skin layer, which is bendable and flexible.