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Single molecule force spectroscopy on poly(vinyl alcohol) by atomic force microscopy
Author(s) -
Li Hongbin,
Zhang Wenke,
Zhang Xi,
Shen Jiacong,
Liu Bingbing,
Gao Chunxiao,
Zou Guangtian
Publication year - 1998
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19981201)19:12<609::aid-marc609>3.0.co;2-2
Subject(s) - vinyl alcohol , force spectroscopy , molecule , atomic force microscopy , materials science , spectroscopy , nanoscopic scale , microscopy , elasticity (physics) , nanotechnology , chemistry , polymer , composite material , optics , physics , organic chemistry , quantum mechanics
The elastic properties of poly(vinyl alcohol) (PVA) were investigated on the nanoscale using the new technique of single molecule force spectroscopy by atomic force microscopy (AFM). It was found that the elastic properties of PVA molecules scale linearly with their contour lengths. This finding corroborates that the deformation of individual PVA chains is measured. The force spectra of PVA show a kink at around 200 pN and cannot be fitted by an extended Langevin function. The deviation of the elastic behavior of PVA from a freely jointed chain model may indicate the presence of a suprastructure of PVA in NaCl solution.