Journal
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
Volume 38, Issue 12, Pages 1345-1354Publisher
MARCEL DEKKER INC
DOI: 10.1081/MA-100108389
Keywords
surface relief grating; azobenzene chromophore; cellulose; birefringence
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Surface relief gratings (SRG) on films of azobenzene-modified cellulose (azocellulose) with ultrahigh molecular weight were holographically recorded in a single step. Surface modulation depth of the SRGs increased with the degree of substitution (DS) of the azobenzene chromophores in the cellulose as well as with the grating spacing. Large surface modulations over 500 nm on all samples were obtained with a grating spacing of 4 mum. A linear increase of photoinduced birefringence with the azobenzene chromophore concentration in these photodynamic polymers was also observed. The maximum birefringence of 0.11 was achieved for an azocellulose polymer with a DS of 0.99.
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