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Investigation of microstructured chitosans by coherent anti‐Stokes Raman microscopy
Author(s) -
DEMENTJEV A.,
MORDAS G.,
ULEVIČIUS V.,
GULBINAS V.
Publication year - 2015
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/jmi.12204
Subject(s) - chitosan , microscopy , characterization (materials science) , raman spectroscopy , materials science , polystyrene , raman scattering , optical microscope , nanotechnology , optics , chemical engineering , scanning electron microscope , composite material , polymer , physics , engineering
Summary This work describes application of coherent anti‐Stokes Raman scattering (CARS) microscopy technique for analytical characterization of microstructured materials based on chitosan. We demonstrate that nitrogen–hydrogen vibration band in the high wavenumber region of CARS spectrum prevails over response from oxygen–hydrogen vibrations and can be used as a spectral marker of chitosan. The chemically selective imaging is experimentally demonstrated by applying CARS microscopy to discriminate between chitosan and polystyrene microparticles. CARS microscopy was shown to be a valuable tool for characterization of polluted chitosan fibre from utilized engine filter material. A possibility to observe foreign material pieces on the surface of the polluted chitosan fibre is demonstrated and discussed.