Correction of diffraction effects in confocal raman microspectroscopy

Article English OPEN
Gallardo, A. ; Navarro, R. ; Reinecke, H. ; Spells, S. J. (2006)

<p> A mathematical approach developed to correct depth profiles of\ud wet-chemically modified polymer films obtained by confocal Raman\ud microscopy is presented which takes into account scattered contributions originated from a diffraction-limited laser focal volume. It is demonstrated that the problem can be described using a linear Fredholm integral equation of the first kind which correlates apparent and true Raman intensities with the depth resolution curve of the instrument.\ud The calculations of the corrected depth profiles show that considerable differences between apparent and corrected depth profiles exist at the surface, especially when profiles with strong concentration gradients are dealt with or an instrument with poor depth resolution is used. Degrees of modification at the surface obtained by calculation of the corrected depth profiles are compared with those measured by FTIR-ATR and show an excellent concordance.</p>
  • References (11)
    11 references, page 1 of 2

    K. L. Mittal, and K. W. Lee, Polymer Surfaces and Interfaces: Characterization Modification and Application,VSP: (Utrecht, 1997).

    J. Sacristán, C. Mijangos, and H. Reinecke, “Surface modification of PVC films in solvent-non-solvent mixtures,” Polymer 41, 5577 ( 2000).

    J. Sacristán, C. Mijangos, S. Spells, J. Yarwood, and H. Reinecke, “Selective surface modification of PVC films as revealed by confocal Raman microspectroscopy,” Macromolecules 33, 6134 (2000).

    R. Tabaksblat, J. Meier, and B. J. Kip, “Confocal Raman Microspectroscopy: Theory and Application to Thin Polymer Samples” Appl. Spectrosc. 46, 60 (1992).

    J. Sacristán, C. Mijangos, H. Reinecke, S. J. Spells, and J. Yarwood, “Surface modification of Polystyrene films. Depth profiling and mapping by Raman microscopy” Macromol. Chem. Phys. 203, 678 (2002).

    H. Reinecke, S. Spells, J. Sacristán, C. Mijangos, and J. Yarwood, “Confocal Raman depth profiling of surface modified polymer films. Effect of sample refractive index,” Appl. Spectrosc. 55, 1660 (2001).

    G. D. McAnally, N. J. Everall, J. M. Chalmers, and W. E. Smith, “Analysis of Thin Film Coatings on Poly(ethylene terephthalate) by Confocal Raman Microscopy and Surface-Enhanced Raman Scattering,” Appl. Spectrosc. 57, 44 (2003).

    W. Schrof, E. Beck, G. Etzrodt, H. Hintze-Brüning, U. Meisenburg, R. Schwalm, and J. Warming, “Depth-resolved characterization of UV cured coatings by confocal Raman and two-photon microscopy,” Progress in Organic Coatings 43, 1 (2001).

    O. S. Fleming, and S. G. Kazarian, “Confocal Raman Microscopy of Morphological Changes in Poly(ethylene terephthalate) Film Induced by Supercritical CO2,” Appl. Spectrosc. 58, 390 (2004).

    G. W. M. Peters, A. N. Zdravkov, and H. E. H. Meijer, “Transient interfacial tension and dilatational rheology of diffuse polymer-polymer interfaces,” J. Chem. Phys. 122, Art. No. 104901 (2005).

  • Metrics
    0
    views in OpenAIRE
    0
    views in local repository
    66
    downloads in local repository

    The information is available from the following content providers:

    From Number Of Views Number Of Downloads
    Sheffield Hallam University Research Archive - IRUS-UK 0 66
Share - Bookmark