期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 30, 期 24, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-648X/aac286
关键词
DNA; confinement; compression; nanochannel
资金
- KAKENHI from MEXT, Japan [JP16H00804]
- JST, PRESTO [JPMJPR16N5]
We analyze the behavior of a semiflexible polymer confined in nanochannel under compression in axial direction. Key to our discussion is the identification of two length scales; the correlation length. of concentration fluctuation and what we call the segregation length xi(w). These length scales, while degenerate in uncompressed state in nanochannel, generally split as xi < xi(w) upon compression, and the way they compete with the system size during the compression determines the crossover from quasi-1D nanochannel to quasi-0D nanocavity behaviors. For a flexible polymer, the story becomes very simple, which corresponds to a special limit of our description, but a much richer behavior is expected for a semiflexible polymer relevant to DNA in confined spaces. We also briefly discuss the dynamical properties of the compressed polymer.
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