Orientational control of anisotropic nanometer scaled objects


Wei Kong, kongw@chem.orst.edu, Department of Chemistry, Oregon State University, Corvallis, OR 97331
We report the possibility of aligning anisotropic objects using a fast oscillating electric field. The thus induced birefringence is used as a measure of the net alignment effect. Results on DNA restricted fragments containing 80 base pairs and on carbon nanotubes are presented. Effects of the field intensity and duration are also discussed. The decay dynamics are reflective of the shape and rigidity of the nanometer sized object. Theoretical modeling qualitatively agrees with the experimental observation.