Sensing with Thermally Reduced Graphene Oxide under Repeated Large Multi-Directional Strain.

d (10), relative resistance change can be calculated by Equation (11): (11) Δ R R 0 = R ε − R 0 R 0 = 2 ε + ε 2 Equation (11) shows a second-order polynomial, but because strains are small in this range, the strain squared term is very small, resulting in reasonably linear behavior ( Figure 6 ) and an increasing trend, with a coefficient of determination of 99.98% and 100% for induced strains between 0 and 12%.

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