Maximum-entropy calculation of end-to-end distance distribution of force stretching chains

Details Maximum-entropy calculation of end-to-end distance distribution of force stretching chains Maximum-entropy calculation of end-to-end distance distribution of force stretching chains

2002-12-12

arxiv.org/abs/cond-mat/0212270v1

Physics

Condensed Matter

Soft Condensed Matter

13 pages, 14 figures

Scientific paper

10.1063/1.1610447

Using the maximum-entropy method, we calculate the end-to-end distance distribution of the force stretched chain from the moments of the distribution, which can be obtained from the extension-force curves recorded in single-molecule experiments. If one knows force expansion of the extension through the $(n-1)$th power of force, it is enough information to calculate the $n$ moments of the distribution. We examine the method with three force stretching chain models, Gaussian chain, free-joined chain and excluded-volume chain on two-dimension lattice. The method reconstructs all distributions precisely. We also apply the method to force stretching complex chain molecules: the hairpin and secondary structure conformations. We find that the distributions of homogeneous chains of two conformations are very different: there are two independent peaks in hairpin distribution; while only one peak is observed in the distribution of secondary structure conformations. Our discussion also shows that the end-to-end distance distribution may discover more critical physical information than the simpler extension-force curves can give.

Affiliated with

Also associated with

No associations

Rating

Maximum-entropy calculation of end-to-end distance distribution of force stretching chains does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Maximum-entropy calculation of end-to-end distance distribution of force stretching chains, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Maximum-entropy calculation of end-to-end distance distribution of force stretching chains will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-404083