Molten o-H3PO4 - A New Electrolyte for the Anodic Synthesis of Self-Organized Oxide Structures: WO3 Nanochannel Layers and Others

摘要

We introduce the use of pure molten ortho-phosphoric acid (o-H3PO4) as anelectrolyte for selforganizing electrochemistry. This electrolyte allows forthe formation of self-organized oxide architectures (one-dimensional nanotubes,nanochannels, nanopores) on metals such as tungsten that up to now wereregarded as very difficult to grow self-ordered anodic oxide structures. Inthis work, we show particularly the fabrication of thick, vertically alignedtungsten oxide nanochannel layers, with pore diameter of ca. 10 nm, andillustrate their potential use in some typical applications.