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Preparation of Porous Silicon by Electrochemical Etching Methods and its Morphological and Optical Properties

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Figure

Table 1. Etching conditions for different etching time.
Figure 2.  (a) Physical model for the crack formation mechanism; (b) SEM image of the PS after spraying with gold
Figure 4.  Reflectance of the porous silicon layer at different etching time.
Table 2. Etching conditions for different current densities.
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