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Volumn 117, Issue 30, 1995, Pages 7943-7949

Chemical force microscopy: Exploiting chemically-modified tips to quantify adhesion, friction, and functional group distributions in molecular assemblies

Author keywords

[No Author keywords available]

Indexed keywords


EID: 0000226927     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja00135a012     Document Type: Article
Times cited : (544)

References (78)
  • 55
    • 85087249200 scopus 로고    scopus 로고
    • note
    • 4 catilever-tip assemblies.
  • 57
    • 85087250039 scopus 로고
    • personal communication
    • The error of ±20% does not exceed the accuracy of the resonance-endmass calibration method. (Cleveland, J. P., personal communication, 1994).
    • (1994)
    • Cleveland, J.P.1
  • 59
    • 85087247584 scopus 로고    scopus 로고
    • note
    • 35 The contribution of capillary forces to measured data can be eliminated by carrying out experiments in ultrahigh vacuum or fluid solution.
  • 61
    • 85087251277 scopus 로고    scopus 로고
    • unpublished results
    • The Gaussian fits are believed to provide a good means for estimating the uncertainty in these experiments but may not represent the best model for fitting this type of data (Noy, A.; Lieber, C. M. unpublished results). For example, the Gaussian fit assumes a symmetric distribution of forces between ±∞, while all forces are >0.
    • Noy, A.1    Lieber, C.M.2
  • 64
    • 85087248648 scopus 로고    scopus 로고
    • note
    • s = 54 nm
  • 72
    • 85087249899 scopus 로고    scopus 로고
    • note
    • 1/2] where R is the tip radius. Hence, as the tip radius increases the contact area and number of intermolecular interactions will increase for a given applied load.
  • 74
    • 85087248466 scopus 로고    scopus 로고
    • note
    • Adhesion and friction force measurements were made with samples composed of homogeneous long-chain alkylthiols which have crystalline structure (see ref 25). In the case of functional group imaging, SAMs terminating in a relatively bulky phenylazide group were used, and the desired terminal groups were subsequently attached photochemically. Though the same trend in friction is observed in these SAMs as with the simpler homogeneous monolayers, the same argument for crystalline structure cannot be made.
  • 76
    • 85087247234 scopus 로고    scopus 로고
    • note
    • 2O will be present on a surface even in inert atmosphere conditions).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.