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Volumn 34, Issue 4, 2001, Pages 1039-1047

Elasticity of single polyelectrolyte chains and their desorption from solid supports studied by AFM based single molecule force spectroscopy

Author keywords

[No Author keywords available]

Indexed keywords

ATOMIC FORCE MICROSCOPY; CHEMICAL BONDS; DESORPTION; ELASTICITY; SPECTROSCOPIC ANALYSIS; SUBSTRATES;

EID: 0035250982     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma0009404     Document Type: Article
Times cited : (239)

References (74)
  • 7
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    • Horn, D., Linkart, F., Roberts, Ed.; Blackie Academic & Professional: Glasgow, 1996; pp 64-82
    • Horn, D., Linkart, F., Roberts, Ed.; Blackie Academic & Professional: Glasgow, 1996; pp 64-82.
  • 15
    • 0030848621 scopus 로고    scopus 로고
    • and references herein
    • (b) Decher, G. Science 1997, 277, 1232-1237 and references herein.
    • (1997) Science , vol.277 , pp. 1232-1237
    • Decher, G.1
  • 62
    • 14344268723 scopus 로고    scopus 로고
    • note
    • In earlier studies of covalently attached polymers on silanized glass substrates, the rupture of the Si-C bond in the silane anchor determined the available force range. There, an average rupture force of ∼2 nN was observed (cf. ref 30). Here, the β-hydroxyalkylamino groups formed upon reaction of amino groups with the epoxysurface functions appears to be the limiting factor. On average, the investigated system holds forces of ∼1.3 nN, the highest observed rupture force of single polymer strands was ∼1.9 nN (compare Figure 4a).
  • 64
    • 14344284686 scopus 로고    scopus 로고
    • note
    • For comparison, the freely jointed chain (FJC) model has been used but was found to model the experimental data with less accuracy.
  • 66
    • 14344274312 scopus 로고    scopus 로고
    • note
    • It should be mentioned that usually a readsorption of polyvinylamine molecules was observed when the AFM tip was brought into contact with the surface, following a previously measured desorption profile. For polymers of high charge density such as PVA(70%), occasionally this was even observed on reapproaching the surface before contact between tip and substrate was established.
  • 72
    • 14344272255 scopus 로고    scopus 로고
    • note
    • des ≈ 35 pN was found for the desorption of lowly charged PVA(10%) from hydrophobized silica.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.