Journal article
Optical waveguiding and temperature dependent photoluminescence of nanotubulars grown from molecular building blocks
NanoSYD, MCI, University of Southern Denmark, Alsion 2, 6400 Sønderborg, Denmark1
Institute for Pure and Applied Chemistry and Center of Interface Science, Carl von Ossietzky University Oldenburg, Carl-von-Ossietzky-Straße 9–11, 26129 Oldenburg, Germany2
Optical waveguiding of blue light after UV-excitation is demonstrated in bundles of organic nanotubulars obtained via template assisted aggregation of the small π-conjugated non planar molecules 17H-Tetrabenzo[a,c,g,i]fluorene (17H-Tbf) and 17-Trimethylsilyltetrabenzo[a,c,g,i]fluorene (TMS-Tbf). The propagating blue light is strongly attenuated due to self-absorption.
Vibronic spectra for both nanotubulars and macroscopic crystallites for temperatures between 5 and 300K show a behavior of TMS-Tbf that resembles that of long chained molecules while 17H-TbF resembles that of small organic molecules. For both molecular species crystallites and nanostructures have large average Huang–Rhys factors indicating strong phononic coupling promoted by the polycrystallinity of the samples.
Language: | English |
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Year: | 2013 |
Pages: | 87-91 |
ISSN: | 18734448 and 00092614 |
Types: | Journal article |
DOI: | 10.1016/j.cplett.2013.10.039 |