Batonnet Formation in Magnetically Aligned
DNA Liquid Crystals

Batonnet Formation in Magnetically Aligned DNA Liquid Crystals

The formation of batonnets appears somewhat ordered in this photomicrograph of the transition region between cholesteric and high density liquid crystalline DNA. Orientation of the transition region with a 5 Tesla magnetic field increases the helical pitch of the unwinding cholesteric mesophase, which is spontaneously forming batonnets during the phase transition as is evident in the image presented above. It appears as if the batonnets are interconnected with the characteristic oily streak texture of the cholesteric phase. As the batonnets continue to grow, the cholesteric phase vanishes and the batonnets form a confluent layer of focal conic liquid crystalline textures. The photomicrograph magnification is approximately 600x, and was recorded on Fujichrome 64T transparency film using a Nikon Optiphot-Pol microscope with crossed polarized illumination. Exposures were recorded about 2.5 f-steps under the recommended value given by an in-camera photomultiplier and were push-processed approximately 1.5 f-steps in the first E-6 developer.

© 1995-2022 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Monday, Jul 02, 2018 at 03:21 PM
Access Count Since May 1, 2000: 29320