Elasticity of single polymer chains

被引:20
作者
Maaloum, M [1 ]
Courvoisier, A [1 ]
机构
[1] Univ Strasbourg 1, Inst Charles Sadron, F-67083 Strasbourg, France
关键词
D O I
10.1021/ma981023p
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Telechelic polymer chains (hydrophobic end-capped poly(ethylene oxide)) linked to a hydrophobic surface were probed with the atomic force microscope tip by vertical stretching. Under conditions that allowed only a limited number of molecular chains to interact with the hydrophobic atomic force microscope tip, the gradient of the forces was found to be quantized in integer multiples of 540 +/- 30 and 330 +/- 25 mu N/m for polymers of mass 20 000 and 35 000, respectively. The measured force gradient quanta is interpreted as the stiffness of a single polymer chain. This work may shed new light on macromolecules at interfaces involving chain extensions and opens the route for elasticity studies of single macromolecules.
引用
收藏
页码:4989 / 4992
页数:4
相关论文
共 17 条
[1]   Aggregation of hydrophobically end-capped poly(ethylene oxide) in aqueous solutions. Fluorescence and light-scattering studies [J].
Alami, E ;
Almgren, M ;
Brown, W ;
Francois, J .
MACROMOLECULES, 1996, 29 (06) :2229-2243
[2]   STRETCHING DNA WITH A RECEDING MENISCUS - EXPERIMENTS AND MODELS [J].
BENSIMON, D ;
SIMON, AJ ;
CROQUETTE, V ;
BENSIMON, A .
PHYSICAL REVIEW LETTERS, 1995, 74 (23) :4754-4757
[3]   ENTROPIC ELASTICITY OF LAMBDA-PHAGE DNA [J].
BUSTAMANTE, C ;
MARKO, JF ;
SIGGIA, ED ;
SMITH, S .
SCIENCE, 1994, 265 (5178) :1599-1600
[4]   End-adsorbed telechelic polymer chains at surfaces: Bridging and elasticity [J].
Courvoisier, A ;
Isel, F ;
Francois, J ;
Maaloum, M .
LANGMUIR, 1998, 14 (14) :3727-3729
[5]   END-ADSORBED TRIBLOCK COPOLYMER CHAINS AT THE LIQUID SOLID INTERFACE - BRIDGING EFFECTS IN A GOOD SOLVENT [J].
DAI, LM ;
TOPRAKCIOGLU, C .
MACROMOLECULES, 1992, 25 (22) :6000-6006
[6]  
de Gennes P.G., 1979, SCALING CONCEPTS POL
[7]   MEASUREMENT OF FORCES IN LIQUIDS USING A FORCE MICROSCOPE [J].
DUCKER, WA ;
SENDEN, TJ ;
PASHLEY, RM .
LANGMUIR, 1992, 8 (07) :1831-1836
[8]   ADHESION FORCES BETWEEN INDIVIDUAL LIGAND-RECEPTOR PAIRS [J].
FLORIN, EL ;
MOY, VT ;
GAUB, HE .
SCIENCE, 1994, 264 (5157) :415-417
[9]   ATOMIC-FORCE MICROSCOPE WITH MAGNETIC FORCE MODULATION [J].
FLORIN, EL ;
RADMACHER, M ;
FLECK, B ;
GAUB, HE .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1994, 65 (03) :639-643
[10]  
FRANCOIS J, 1996, COLL INTERF SCI, V112, P253