Mechanical unfolding of a homopolymer globule: applied force vs applied deformation

Autor:	Polotsky, Alexey A., Smolyakova, Elizaveta E., Borisov, Oleg V., Birshtein, Tatiana M.
Rok vydání:	2012
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Statistical Mechanics
Zdroj:	Macromol. Symp. 296, 639 (2010)
Druh dokumentu:	Working Paper
DOI:	10.1002/masy.201051084
Popis:	We propose the quantitative mean-field theory of mechanical unfolding of a globule formed by long flexible homopolymer chain collapsed in poor solvent and subjected to an extensional force We show that with an increase in the applied force the globule unfolds as a whole without formation of an intermediate state. The value of the threshold force and the corresponding jump in the distance between chain ends increase with a deterioration of the solvent quality and / or with an increase in the degree of polymerization. This way of globule unfolding is compared with that in the D-ensemble, when the distance between chain ends is imposed. Comment: 14 pages, 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1205.2756 Zobrazit plný text záznamu View this record from Arxiv