SERS Substrates by the Assembly of Silver Nanocubes: High-Throughput and Enhancement Reliability Considerations

Figure 3

Analysis of SSEF data. (a) The data is grouped into 𝑁 categories (𝑁=2): set 1 consists of a list of 𝑛₁=100 values (blue), and set 2 consists of a list of 𝑛₂=60 values (red). The list content is plotted against the list index that indicates the sequence in which the data was collected and has no physical meaning. (b) The values within each category are sorted in descending order. (c) The list index is normalized to allow a direct comparison between the lists. The normalized list indices are 0.01,0.02,…,1 for set 1 with 𝑛₁=100 (blue) and 1/60,1/30,1/20,…,1 for set 2 with 𝑛₂=60 (red). Note that 12% of the SSEF values in set 1 and 33% of the values in set 2 are lower than 10⁴ and thus are not displayed in any of the plots.