Using Buckyballs To Cut Off Light! Novel Fullerene Materials with Unique Optical Transmission Characteristics
| Autor: | Yongqiang Dong, Han Peng, Nai-Teng Yu, Yuping Dong, Ben Zhong Tang, Andrew X. Wu, Fennie S. M. Leung, and Xinde Feng |
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| Rok vydání: | 2004 |
| Předmět: |
chemistry.chemical_classification
Fullerene Materials science business.industry General Chemical Engineering General Chemistry Polymer Molecular physics Cutoff frequency Spectral line Nanoclusters Wavelength Optics Path length chemistry Physics::Atomic and Molecular Clusters Materials Chemistry business Optical filter |
| Zdroj: | Chemistry of Materials. 16:4790-4798 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/cm049680l |
| Popis: | A simple rule governing the light transmission through a fullerene solution or solid is revealed, and a group of fullerene derivatives, glasses, and polymers are found to be able to continuously cut off lights of any wavelength in almost the entire UV and visible spectral region in a predictable and reliable manner. The solutions of aminated fullerenes 1−4 give structureless light transmission spectra well-resembling those of cutoff optical filters. The spectrum bathochromically moves with an increase in concentration (c), whose cutoff wavelength (λc) increases logarithmically with bc, i.e., λc = α log bc + k, where b is the path length and α and k are constants. The spectra are reproducible and stable, changing little over a long period of time. In the solutions, the fullerene molecules aggregate into nanoclusters and their average sizes increase with increasing concentration, suggesting that the formation and growth of the fullerene nanoaggregates are responsible for the concentratochromism. The chromic... |
| Databáze: | OpenAIRE |
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