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Fig. 5 | Nanoscale Research Letters

Fig. 5

From: Unraveling the Morphological Evolution and Etching Kinetics of Porous Silicon Nanowires During Metal-Assisted Chemical Etching

Fig. 5

Evolution of SiNW length with time for different HF–H2O2 molar ratios at 48 M H2O. a Effect of etch time on SiNW length. b, c SEM images of SiNWs after etching for 1 h in a solution composed of 48 M H2O and HF–H2O2 molar ratios of 0.9 and 0.98, respectively. d, e Etched bulk Si thickness with respect to the tip and base of the SiNWs over time

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