Abstract
In this paper, we report an unexpected dissolution phenomenon at n-InP electrodes during porous etchiong in 1M HCl under potentiostatic consitions (5V vs. Ag/AgCl). Although the scanning electron microscope examinations show the typical tubular and regular pores that exhibit a depth proportional to the anodic charge, further chemical analyses of the dissolved material performed after the pores formation by atomic absorption spectroscopy reveal a dual dissolution process. An electrochemical etching process exhibiting a valence of 8 is evidenced. Howeverit is surprisingly coupled to a chemical dissolution that correspnds to the half the dissolved InP.
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