New experimental techniques have enabled the fabrication of extremely thin shells and vesicles, with thicknesses down to a few nanometers and diameters up to tens of microns. At such small length scales, thermal fluctuations strongly modify the elastic behavior of the shells. Classical shell theory, which successfully predicts the mechanical response of everyday shell structures such as ping-pong balls, must be modified to correctly describe the behavior of such thin shells. New theory and computer simulations calculate thermal corrections to the predictions of classical shell theory, and agree well with experimental measurements. These corrections have important implications for understanding the mechanical properties of microscale spheres which may be used for chemical and biomedical applications such as drug delivery.
David A. Weitz (Physics & Applied Physics)
Cynthia M. Friend (SEAS)
David R. Nelson (Physics)
Harvard MRSEC (DMR-1420570)