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Electrical and mechanical characterization of the SWS. VOC of the SWS at various pressing frequencies in different moving directions. (a) Circumference direction; and (b) top and bottom direction. (c) The mechanical durability characterization of the SWS with 1000 continuous working cycles at 1.5 Hz. (d) Response time of the VOC when the external stimulus was applied and released at the acceleration of 1.7 m/s2. (e) Water resistance of the SWS.
