Methylene Blue Doped Polymers: efficient Media for Optical Recording

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Methylene Blue Doped Polymers: efficient Media for Optical Recording

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dc.contributor.author Sudha Kartha,C
dc.date.accessioned 2008-08-06T07:08:44Z
dc.date.available 2008-08-06T07:08:44Z
dc.date.issued 2003-10-20
dc.identifier.uri http://dyuthi.cusat.ac.in/purl/610
dc.description.abstract Polymer materials find application in optical storage technology, namely in the development of high information density and fast access type memories. A new polymer blend of methylene blue sensitized polyvinyl alcohol (PVA) and polyacrylic acid (PAA) in methanol is prepared and characterized and its comparison with methylene blue sensitized PVA in methanol and complexed methylene blue sensitized polyvinyl chloride (CMBPVC) is presented. The optical absorption spectra of the thin films of these polymers showed a strong and broad absorption region at 670-650 nm, matching the wavelength of the laser used. A very slow recovery of the dye on irradiation was observed when a 7:3 blend of polyvinyl alcohol/polyacrylic acid at a pHof 3.8 and a sensitizer concentration of 4.67 10 5 g/ml were used. A diffraction efficiency of up to 20% was observed for the MBPVA/alcohol system and an energetic sensitivity of 2000 mJ/cm2 was obtained in the photosensitive films with a spatial frequency of 588 lines/mm. en_US
dc.language.iso en en_US
dc.publisher Taylor and francis en_US
dc.subject Polymer blend en_US
dc.subject Methylene blue sensitized polyvinyl alcohol en_US
dc.subject Polyacrylic acid (PAA) en_US
dc.subject Diffraction efficiency en_US
dc.title Methylene Blue Doped Polymers: efficient Media for Optical Recording en_US
dc.type Working Paper en_US


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