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Fig. 1 | Nanoscale Research Letters

Fig. 1

From: Silicon Substrate Strained and Structured via Cavitation Effect for Photovoltaic and Biomedical Application

Fig. 1

Optical and SEM (7 kV, ×2000) images of Si samples (a–f). Samples from the first group were sonicated in the liquid nitrogen at 6 MHz. Weight percent of alkali metals determined by EDAX technique inside the structured regions of silicon samples is 0.6–1.37 % for Na, 0.16–2.5 % for K, and 0.19–2.07 % for Ca. Weight percent of the oxygen in some areas reached 12 %

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