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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Morandini, Massimo Galli, Giancarlo Allegrini, Maria Fuso, Francesco Menghetti, Sara Tantussi, Francesco Alderighi, Michele |
| Copyright Year | 2012 |
| Abstract | Block copolymers P(MA4-block-MMA)10 and P(MA4-block-MMA)20 and a random copolymer P(MA4-ran-MMA)10 were prepared from azobenzene methacrylate (MA4) and methyl methacrylate (MMA). The former monomer was introduced as both a photoresponsive and a mesogenic component, and the latter as a transparent non-mesogenic component. Thin films of the copolymers were used to investigate all-optical writing by linear-polarized illumination in the pulsed regime to modify the local birefringence at the microscopic scale. The optical properties of P(MA4-block-MMA)10 were compared with those of P(MA4-ran-MMA)10 having the same chemical composition (10 mol% MA4) but different distributions of the two components. It was found that in the block copolymers relatively intense pulses as short as 100 μs produced a remarkable local increase in the birefringence, stable in the time-scale (up to several days) explored in the experiment. In contrast, efficient and stable optical modifications could not be achieved in the random copolymer. |
| Starting Page | 14510 |
| Ending Page | 14517 |
| Page Count | 8 |
| File Format | HTM / HTML PDF |
| ISSN | 09599428 |
| Volume Number | 22 |
| Issue Number | 29 |
| Journal | Journal of Materials Chemistry |
| DOI | 10.1039/c2jm30596h |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Copolymer Azobenzene Methyl methacrylate Monomer Birefringence |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Materials Chemistry |
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