THE DAMPING OF WATER WAVES BY INSOLUBLE ORGANIC MONOLAYERS

摘要

The damping of capillary waves (wavelength < 1.0 cm) by insoluble organic monolayers has been examined in de¬tail at low film pressure. 'The experimental system was designed to (a) generate either circular or plane waves at various frequencies and amplitudes, (b) measure the wave amplitudes, and (c) provide for the addition and removal of insoluble monolayers and the measurement and control of monolayer film pressure. Force vs area curves were also determined for all pure compounds studied and these data were compared with the wave-damping results.nThe damping coefficient k was found to increase slow¬ly as the monolayer was compressed at film pressures <0.1 dyne/cm. Between approximately 0.1 and 0.5 dyne/ cm there was an abrupt rise in k to a maximum value which remained essentially constant with increasing film pres¬sure.