Fig. 9.
Examples of SEM imagens of the sensor unity with (a) negative sequence, (b) blank and PCA3 biomarker with concentrations (μmol L−1) in increasing order (left-right): (c) 10−5, (d) 10−4, (e) 10−3, (f) 10−2, (g) 10−1, (h) 1.
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