| Autor: |
Cohen YS; Department of Chemistry, Columbia University, New York, New York 10027, USA., Xiao S, Steigerwald ML, Nuckolls C, Kagan CR |
| Jazyk: |
angličtina |
| Zdroj: |
Nano letters [Nano Lett] 2006 Dec; Vol. 6 (12), pp. 2838-41. |
| DOI: |
10.1021/nl0620233 |
| Abstrakt: |
Photoconductivity in contorted hexabenzocoronene liquid crystals is found to be exclusively one-dimensional. Spectroscopic measurements and density functional theory support the existence of two pi-systems attributed to a low-energy radialene-core and higher energy out-of-plane alkoxyphenyl rings. Persistent photocurrents, measured as a function of field, channel length, and intensity, fit a stretched exponential characteristic of intracolumnar transport, restricted through the radialene-core by the alkoxyphenyl-cladding. Bimolecular recombination is enhanced with increasing carrier concentration by the system's one-dimensionality. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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