English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Diffusion properties of a self-avoiding polymer embedded in regularlydistributed obstacles with spacing a=20 and confined in two dimensions isstudied numerically using the extended bond fluctuation method which we havedeveloped recently. We have observed for the first time to our knowledge, thatthe mean square displacement of a center monomer $\phi_{M/2}(t)$ exhibits fourdynamical regimes, i.e., $\phi_{M/2}(t) \sim t^{\nu_m}$ with $\nu_m\sim 0.6$,3/8, 3/4, and 1 from the shortest to longest time regimes. The exponents in thesecond and third regimes are well described by segmental diffusion in the``self-avoiding tube''. In the fourth (free diffusion) regime, we havenumerically confirmed the relation between the reptation time $\tau_d$ and thenumber of segments $M, \tau_d\propto M^3$.Comment: 7 pages, 11 figure

Diffusion of single long polymers in fixed and low density matrix of obstacles confined to two dimensions