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. 2013 Aug 16;3:2452. doi: 10.1038/srep02452

Figure 5. Understanding of mechanism for LC-on-OFET sensory devices.

Figure 5

(a) Optical microscope images focused on the channel parts in the LC-on-OFET devices (note that two polarizers were used to observe the LC alignment changes); (a-1) no electric fields and no nitrogen gas flow touch, (a-2) applying electric fields but no nitrogen gas flow touch, (a-3) applying both electric fields and nitrogen gas flow touch. The LC alignment (top view) is given schematically on the far right part for each case, where the (top view) size of LC (5CB) looks small or large depending on the LC alignment. (b) Illustration for the mechanism proposed here on the amplification of the ID signals by the nitrogen gas flow touch: ‘GI' and ‘G' denote the gate insulator (PMMA) and the gate electrode (ITO), respectively. The negative (−) and positive (+) dipoles in the LC (5CB) molecules are explained in Fig. 1.