Abstract
Gold laminar single crystals produced by reductions of auric chloride in acid solution were investigated. A series of different organic reductants and various experimental conditions were used in studying their effects as well as the general growth mechanism. Detailed studies of the auric chloride-salicylic acid system were made, and the results are in excellent agreement on those parts reported by Suito and Uyeda. The size of the small hole observed at the center of the plates is found of the order of 1000 A. whether with or without spiral growth steps. Analysis of the results on the growth for the first 24 hours coupled with electron microscopic observations indicate that the laminar plate formation is a result of aggregation and rearrangement of the primary produced particles of smaller size. Growth of platinum and palladium platelike particles also has been studied and observation presented.
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