Fig.4From: Silver nano-reporter enables simple and ultrasensitive profiling of microRNAs on a nanoflower-like microelectrode array on glassCharacterization of the surface charge, SLP coverage and SLP surface density of the GNEs fabricated with different electroplating time. a–c The chronocoulometry response curves and the SEM images (inset) of the SLP modified GNEs with deposition time of 100 s (a), 200 s (b), and 300 s (c). The calculated surface charges (d), SLP coverage (e), and the SLP density (f) of different GNEs based on the chronocoulometry curves from a–c. N ≥ 3 per group, ns: not significant, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001Back to article page