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Article
Structure and Dynamics of Liquid Crystalline Pattern Formation in Drying Droplets of DNA
Physical Review Letters
  • Ivan I. Smalyukh
  • O. V. Zribi
  • JC Butler
  • Oleg Lavrentovich, Kent State University - Kent Campus
  • G.C.L. Wong
Publication Date
5-5-2006
Document Type
Article
DOI
10.1103/PhysRevLett.96.177801
Keywords
  • phase-transitions,
  • nematic phases,
  • flow,
  • molecules,
  • chains,
  • surface,
  • drops
Disciplines
Abstract

We investigate the formation of ringlike deposits in drying drops of DNA. In analogy with the colloidal "coffee rings," DNA is transported to the perimeter by the capillary flow. At the droplet edge, however, DNA forms a lyotropic liquid crystal (LC) with concentric chain orientations to minimize the LC elastic energy. During the final stages of drying, the contact line retracts, and the radial stress causes undulations at the rim that propagate inward through the LC and form a periodic zigzag structure. We examine the phenomenon in terms of a simple model based on LC elasticity.

Comments

Copyright 2006 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.96.177801

Citation Information
Ivan I. Smalyukh, O. V. Zribi, JC Butler, Oleg Lavrentovich, et al.. "Structure and Dynamics of Liquid Crystalline Pattern Formation in Drying Droplets of DNA" Physical Review Letters Vol. 96 Iss. 17 (2006)
Available at: http://works.bepress.com/oleg_lavrentovich/31/