Single polymer chain rubber elasticity investigated by atomic force microscopy

Ken Nakajima; Hiroyuki Watabe; Toshio Nishi

doi:10.1016/j.polymer.2005.12.092

Single polymer chain rubber elasticity investigated by atomic force microscopy

Ken Nakajima, Hiroyuki Watabe, Toshio Nishi

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

A method, which is called as 'nanofishing', enabled us to stretch a single polymer chain adsorbed on an Au(111) substrate with picking it at its two thiol-modified termini using atomic force microscope equipped with a gold-coated probe. A force-extension curve obtained for a single polystyrene chain in a Θ solvent (cyclohexane) showed a good agreement with a so-called worm-like chain model, and thus gave microscopic information about entropic elasticity. Solvent effects on the statistical properties of single polymer chains were also investigated. For example, the second virial coefficient in cyclohexane was determined at a single polymer basis, which was almost comparable with a simple Flory's lattice model.

Original language	English
Pages (from-to)	2505-2510
Number of pages	6
Journal	Polymer
Volume	47
Issue number	7
DOIs	https://doi.org/10.1016/j.polymer.2005.12.092
Publication status	Published - 2006 Mar 22

Keywords

Atomic force microscopy
Entropic elasticity
Virial coefficient

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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AU - Nakajima, Ken

AU - Watabe, Hiroyuki

AU - Nishi, Toshio

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N2 - A method, which is called as 'nanofishing', enabled us to stretch a single polymer chain adsorbed on an Au(111) substrate with picking it at its two thiol-modified termini using atomic force microscope equipped with a gold-coated probe. A force-extension curve obtained for a single polystyrene chain in a Θ solvent (cyclohexane) showed a good agreement with a so-called worm-like chain model, and thus gave microscopic information about entropic elasticity. Solvent effects on the statistical properties of single polymer chains were also investigated. For example, the second virial coefficient in cyclohexane was determined at a single polymer basis, which was almost comparable with a simple Flory's lattice model.

AB - A method, which is called as 'nanofishing', enabled us to stretch a single polymer chain adsorbed on an Au(111) substrate with picking it at its two thiol-modified termini using atomic force microscope equipped with a gold-coated probe. A force-extension curve obtained for a single polystyrene chain in a Θ solvent (cyclohexane) showed a good agreement with a so-called worm-like chain model, and thus gave microscopic information about entropic elasticity. Solvent effects on the statistical properties of single polymer chains were also investigated. For example, the second virial coefficient in cyclohexane was determined at a single polymer basis, which was almost comparable with a simple Flory's lattice model.

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KW - Entropic elasticity

KW - Virial coefficient

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