Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 19, Issue 18, Pages 2704-2709Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b901782h
Keywords
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Funding
- National Science Foundation Polymer [DMR05-49307]
- MRSEC [DMR05-20020]
- NSEC [DMR04-25780]
- ACS/PRF program [43616-AC7]
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The thermal reshaping of gold nanorods (NRs) in a poly(methyl methacrylate) (PMMA) nanocomposite film is investigated by UV-vis and TEM. To ensure dispersion, the NRs are modified with PEG brushes, and then dispersed in PMMA. Thermal annealing of the PMMA-NR film results in a blue shift of the longitudinal plasmon resonance, caused by a decrease in the length of the NR. The rate of the blue shift increases as temperature increases from 100 degrees C to 200 degrees C, and the longitudinal absorption peak approaches a constant value that scales linearly with temperature. We demonstrate a potential application by fabricating a device with a gradient in optical properties.
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