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. 2016 Feb 15;6:21024. doi: 10.1038/srep21024

Figure 2.

Figure 2

Comparison of different methods of DDIAS for the detection of cocaine (a) and optimization of surface density by changing the ratio between dsDNA probe and MCH using on-chip II approach within DDIAS (b); Each measurement was repeated at least on three independent electrodes to determine the standard deviation.