Nanochannels fabrication is a present aim in many nanotechnology applications. There are many approaches concerning both Top-Down and Bottom-Up techniques. However, for diameters less than 10 nm the Bottom-Up approach seems the only reliable approach. The Kirkendall effect is one of the most successful methods for nanochannels fabrication using spinel material synthesis process.

We report here investigations on nanochannels fabrication by Kirkendall effect using iron oxide (hematite) layer on MgO and ZnO nanowires. Pulsed Laser Deposition (PLD) technique and Vapor-Liquid-Solid (VLS) method have been used for nanowires growth. Iron oxide shell layer deposition has been also made by PLD with various ambient deposition conditions. Traces of nanochannels/nanopores formation have been mainly recorded for amorphous shell layers deposited at room temperatures. Some particularities for diffusion process could be noticed for each nanowire material. Some properties analysis toghether with a comparisons with the alumina shell layer case are also presented.

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1. Ablated Particle Movement in a Pulsed Laser Deposition System