| Language: | English |
|---|---|
| Type: | Article |
| Authors: | Hiroyuki Mayama and Kenichi Yoshikawa |
| Journal: | Faraday discussions of the Chemical Society |
| ISSN: | 1359-6640 |
| Volume: | 120 |
| Month: | 12 |
| Year: | 2001 |
| Actual year: | 2001 |
| Pages: | 67-84 |
| doi: | 10.1039/b105573a |
| Abstract: | We have investigated the dynamical behaviour of the rhythmic conformational change between the folded compact state and the unfolded state in a single polymer chain under thermodynamically open conditions. It is shown that the spontaneous rhythmic change in the conformation of a single polymer chain (T4DNA, 166 kbp, contour length: 56 mum) is generated using a focused continuous wave (CW) Nd : YAG laser beam (wavelength lambda = 1064 nm), where the focused laser beam plays a dual role, both trapping a polymer chain at the focus and creating a temperature gradient around the focus. Furthermore, the whole process of the rhythmic conformational change: the course of melting, nucleation and growth between the folded and unfolded states has been clarified. The rhythmic change in the conformation is discussed in terms of the limit-cycle oscillation driven by the dissipation of the photon energy. |
Hiroyuki Mayama and Kenichi Yoshikawa, Faraday discussions of the Chemical Society, 120, 67-84 (2001)