Porous nanostructures III-V semiconductors 2 Nanostructures 2 Optical properties 2 Absorbances 1 Absorptance 1 Alternating current 1 Catalyst selectivity 1 Chlorination 1 Chlorine compounds 1 Comparative studies 1 Crystal atomic structure 1 Different precursors 1 Different shapes 1 Different substrates 1 Electric impedance measurement 1 Electrochemical etching 1 Electronic equipment 1 Energy dispersive X ray spectroscopy 1 Energy dispersive spectroscopy 1 Ferric chloride 1 Ferric nitrate 1 Field emission microscopes 1 Field emission scanning electron microscopy 1 Gallium arsenide 1 Gallium nitride 1 Granular shape 1 Hematite 1 High-resolution x-ray diffraction 1 Hole-array structures 1