On the structure of multilayers. Part I

Abstract
X -ray and microscopic examinations of multilayers of certain long-chain esters deposited on transparent bases have been made. An X -ray photograph of a stationary multilayer of ethyl stearate is apparently identical with that obtained by rotating a single crystal of β -ethyl stearate about the long axis of the cell. The spots previously observed on oscillation photographs of multilayers of ethyl stearate are in reality parts of circles, successive arcs of which appear on increasing the angle of incidence of the X -rays on the multilayer. These facts reveal that the multilayer consists of microcrystals all oriented with one axis in common, this axis being the normal to the surface of the multilayer. The single crystals appear to have grown without interruption throughout the entire thickness of the multilayer, which in these investigations was about 1000 mol. thick.

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