Single polymer chain elongation by atomic force microscopy

被引：117

作者：

Bemis, JE ^{[1
]}

Akhremitchev, BB ^{[1
]}

Walker, GC ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA

来源：

LANGMUIR | 1999年 / 15卷 / 08期

关键词：

D O I：

10.1021/la980853t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The elastic deformation of single polystyrene-b-poly-2-vinylpyridine chains from spun cast films was investigated by atomic force microscopy. A nonlinear elastic response is shown to be present hundreds of nanometers above the bulk surface. The length of the elastic response monotonically increases with molecular weight of the polymer. These nonlinear elastic responses are fit to wormlike chain and freely joined chain models giving persistence and Kuhn lengths of approximately 3 and 4 Angstrom, respectively. The entropic models reveal that the polymer chains are stretched to 80-90% of their contour length before the attachment to the tip is ruptured.

引用

页码：2799 / 2805

页数：7

共 31 条

[1] COMMENTS ON THE USE OF THE FORCE MODE IN ATOMIC-FORCE MICROSCOPY FOR POLYMER-FILMS [J].

AIME, JP ;

ELKAAKOUR, Z ;

ODIN, C ;

BOUHACINA, T ;

MICHEL, D ;

CURELY, J ;

DAUTANT, A .

JOURNAL OF APPLIED PHYSICS, 1994, 76 (02) :754-762

[2] Atomic force microscopy studies of hydration of fluorinated amide/urethane copolymer film surfaces [J].

Akhremitchev, BB ;

Mohney, BK ;

Marra, KG ;

Chapman, TM ;

Walker, GC .

LANGMUIR, 1998, 14 (15) :3976-3982

[3]

BEMIS JM, UNPUB

[4] Interpretation of force curves in force microscopy [J].

Burnham, N.A. ;

Colton, R.J. ;

Pollock, H.M. .

1600, (04)

[5] Detachment of a single polyelectrolyte chain adsorbed on a charged surface [J].

Chatellier, X ;

Senden, TJ ;

Joanny, JF ;

di Meglio, JM .

EUROPHYSICS LETTERS, 1998, 41 (03) :303-308

[6] ADHESION FORCES BETWEEN INDIVIDUAL LIGAND-RECEPTOR PAIRS [J].

FLORIN, EL ;

MOY, VT ;

GAUB, HE .

SCIENCE, 1994, 264 (5157) :415-417

[7]

Flory P. J., 1969, STAT MECH CHAIN MOL

[8] ON THE DEFORMATION-BEHAVIOR OF COLLAPSED POLYMERS [J].

HALPERIN, A ;

ZHULINA, EB .

EUROPHYSICS LETTERS, 1991, 15 (04) :417-421

[9] QUANTIZED ADHESION DETECTED WITH THE ATOMIC FORCE MICROSCOPE [J].

HOH, JH ;

CLEVELAND, JP ;

PRATER, CB ;

REVEL, JP ;

HANSMA, PK .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (12) :4917-4918

[10]

ISRAELACHVILLI JN, 1992, INTERMOLECULAR SURFA, P204

← 1 2 3 4 →