title: Investigation of microstructured chitosans by coherent anti-Stokes Raman microscopy.
abstract: 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.
authors.affiliation: Center for Physical Sciences and Technology, A. Goštauto, Vilnius, Lithuania.
authors.forename: A
authors.initials: A
authors.lastname: Dementjev
authors.forename: G
authors.initials: G
authors.lastname: Mordas
authors.forename: V
authors.initials: V
authors.lastname: Ulevičius
authors.forename: V
authors.initials: V
authors.lastname: Gulbinas
mesh_terms: D048271:Chitosan / Q000032:analysis*; D008853:Microscopy / Q000379:methods*; D052638:Particulate Matter / Q000737:chemistry*; D011137:Polystyrenes / Q000032:analysis; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D052638:Particulate Matter; D011137:Polystyrenes; D048271:Chitosan
keywords: Chitosan; coherent anti-Stokes Raman scattering microspectroscopy; imaging