Influence of laser irradiation on the thin collagen films.
Part II. Spectroscopic investigations of collagen "micro-foam” structure
Polimery 2007, No 7/8, 571
Specific structure of collagen was characterized in detail (Scheme A, B and C). On this basis the interpretation of the effects of energy and number of pulses of excimer laser KrF (λ=248nm) on the collagen film structure array (Fig. 1-5, Table 1) (determined by Raman and FTIR-ATR spectroscopic methods) has been done. The decay of short range interactions (hydrogen bonds, Van der Waals forces and hydrophobic interactions) as well as water loss were found. As a result of all this the triple helix of collagen partially change the structure to random coil. Additionally, the Raman spectra suggest the reactions of chain scission of collagen caused by high energy of photons (5eV) of the laser used.
Key words: collagen, laser irradiation, Raman spectroscopy, FTIR-ATR spectroscopy, „micro-foam”, short range interactions, triple helix, random coil, chain scission
M. Wiśniewski, A. Sionkowska, H. Kaczmarek, S. Lazare, V. Tokarev
Influence of laser irradiation on the thin collagen films. Part II. Spectroscopic investigations of collagen "micro-foam” structure