Electrochemical Oxidation of Uric Acid and Xanthine at the Pyrolytic Graphite Electrode

Abstract

Crystallographic aspects of zinc electrodeposited on to polycrystalline cathode from baths with or without organic colloids have been investigated by electron diffraction (reflection method) and electron microscopy (replica method). At the initial stage of deposition, the zinc layer always consists of fine‐grained crystallites oriented at random. As the zinc layer becomes thicker, some of these crystallites grow larger to yield a fiber orientation depending on the depositing condition. For such relatively thick zinc layers deposited under various degrees of influence of hydrogen and/or organic colloids, the orientation and texture are interpreted from standpoint of crystal growth.