Single-molecule force spectroscopy on poly(acrylic acid) by AFM

Authors
Li, HB Liu, BB Zhang, X Gao, CX Shen, JC Zou, GT
Citation
Hb. Li et al., Single-molecule force spectroscopy on poly(acrylic acid) by AFM, LANGMUIR, 15(6), 1999, pp. 2120-2124
Citations number
20
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LANGMUIR
ISSN journal
07437463 → ACNP
Volume
15
Issue
6
Year of publication
1999
Pages
2120 - 2124
Database
ISI
SICI code
0743-7463(19990316)15:6<2120:SFSOPA>2.0.ZU;2-5
Abstract
The mechanical properties of poly(acrylic acid) (PAA) were investigated on the molecular scale by using AFM. PAA was adsorbed onto a glass substrate a nd then picked up at one point of the chain with the AFM tip and stretched. The deformation of single PAA chains under tension was measured and modele d by a modified freely-joint-chain model. The length distribution of loops and tails of adsorbed PAA on the glass substrate was also studied by analyz ing the extension of the filaments.