Complex effects of molecular topology on diffusion in entangled biopolymer blends

被引：45

作者：

Chapman, Cole D. ^{[2
]}

Shanbhag, Sachin ^{[3
]}

Smith, Douglas E. ^{[2
]}

Robertson-Anderson, Rae M. ^{[1
]}

机构：

[1] Univ San Diego, Dept Phys, San Diego, CA 92110 USA

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] Florida State Univ, Dept Sci Comp, Tallahassee, FL 32306 USA

来源：

SOFT MATTER | 2012年 / 8卷 / 35期

基金：

美国国家科学基金会;

关键词：

SELF-DIFFUSION; DNA-MOLECULES; SINGLE-MOLECULE; RING POLYMERS; VISCOELASTIC PROPERTIES; CYCLIC POLYMERS; LINEAR-POLYMERS; BINARY BLENDS; DYNAMICS; POLYSTYRENES;

D O I：

10.1039/c2sm26279g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

By combining single-molecule tracking with bond-fluctuation model simulations, we show that diffusion is intricately linked to molecular topology in blends of entangled linear and ring biopolymers, namely DNA. Most notably, we find a previously unreported non-monotonic dependence of the self-diffusion coefficient for linear DNA on the fraction of linear DNA comprising the ring-linear blend, which we argue arises from a second-order effect of ring DNA molecules being threaded by varying numbers of linear DNA molecules. Results address several debated issues regarding molecular dynamics in biopolymer blends, which can be used to develop novel tunable biomaterials.

引用

页码：9177 / 9182

页数：6

共 50 条

[31] Direct measurement of the intermolecular forces confining a single molecule in an entangled polymer solution [J].

Robertson, Rae M. ;

Smith, Douglas E. .

PHYSICAL REVIEW LETTERS, 2007, 99 (12)

[32] Self-diffusion of entangled linear and circular DNA molecules: Dependence on length and concentration [J].

Robertson, Rae M. ;

Smith, Douglas E. .

MACROMOLECULES, 2007, 40 (09) :3373-3377

[33] Strong effects of molecular topology on diffusion of entangled DNA molecules [J].

Robertson, Rae M. ;

Smith, Douglas E. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2007, 104 (12) :4824-4827

[34] Diffusion of isolated DNA molecules: Dependence on length and topology [J].

Robertson, Rae M. ;

Laib, Stephan ;

Smith, Douglas E. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2006, 103 (19) :7310-7314

[35] MELT PROPERTIES OF RING POLYSTYRENES [J].

ROOVERS, J .

MACROMOLECULES, 1985, 18 (06) :1359-1361

[36] SYNTHESIS AND CHARACTERIZATION OF RING POLYBUTADIENES [J].

ROOVERS, J ;

TOPOROWSKI, PM .

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1988, 26 (06) :1251-1259

[37] VISCOELASTIC PROPERTIES OF POLYBUTADIENE RINGS [J].

ROOVERS, J .

MACROMOLECULES, 1988, 21 (05) :1517-1521

[38]

Roovers J., 2000, CYCLIC POLYM

[39] Observation of polymer conformation hysteresis in extensional flow [J].

Schroeder, CM ;

Babcock, HP ;

Shaqfeh, ESG ;

Chu, S .

SCIENCE, 2003, 301 (5639) :1515-1519

[40] Chain retraction potential in a fixed entanglement network [J].

Shanbhag, S ;

Larson, RG .

PHYSICAL REVIEW LETTERS, 2005, 94 (07)

← 1 2 3 4 5 →