Mechanical Characterization of Reduced Graphene Oxide Using AFM

Figure 17

This plot compares the hardness of the sample based on the number of LightScribe reduction cycles. The red points are the average values for the thirty data points taken after each cycle. In order to depict the changing nature of the hardness, these points were fit using a polynomial function shown above. The hardness increased for the three reduction cycles before leveling off during the fourth and fifth cycles. The error bars depict the standard deviation of the hardness for the thirty data points taken after each reduction cycle.