Janus Close (IMAGE) DOE/Argonne National Laboratory Caption These are surface SEM images of Janus membrane front faces grown with 150, 200 and 300 cycles at .015, .06 and .15 second exposures. A general trend of quicker nucleation and following onset of conformal growth is observed at higher exposure doses and more cycles. This electron microscope image was taken on Carl Zeiss Merlin SEM at the University of Chicago. Credit The University of Chicago Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.