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Flexibility cycling behavior of cellulosic ZnO nanorods UV sensors grown on (a) tracing paper and (b) Whatman paper as a function of a curvature radius of 45, 25 and 15 cm (R45, R25 and R15, respectively). R0 is the measurement with no bending. (c) Photograph of cellulosic ZnO nanorods UV sensor, in a bending state, without and with UV light.
