Nanosized crystallites of charge-transfer complex of 9-methylanthracene and 1,2,4,5-tetracyanobenzene for bright and optically anisotropic fluorescent probes

Noriko Hosaka, Masahiro Obata, Motohiko Suzuki, Toshiharu Saiki, Kenji Takeda, Makoto Kuwata-Gonokami

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Nanocrystallites of charge-transfer (CT) complexes with an average size of 20-40 nm were synthesized from ethyl acetate solutions of 9-methylanthracene and 1,2,4,5-tetracyanobenzene by means of spin coating. The optical properties of nanocrystallites were investigated by dark-field and fluorescence imagings. No blinking behavior was observed. Fluorescence brightness and photostability comparable to a standard dye-doped polystyrene sphere were confirmed. We found a pronounced dependence of fluorescence intensity on the polarization of excitation light due to optical anisotropy of the nanocrystallites. The results indicate that the CT nanocrystallite is a promising tool for the observation of rotational motion of nanoobjects in nanofluidics.

Original languageEnglish
Article number113305
JournalApplied Physics Letters
Volume92
Issue number11
DOIs
Publication statusPublished - 2008

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crystallites
charge transfer
fluorescence
probes
blinking
coating
acetates
polystyrene
brightness
dyes
optical properties
anisotropy
polarization
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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Nanosized crystallites of charge-transfer complex of 9-methylanthracene and 1,2,4,5-tetracyanobenzene for bright and optically anisotropic fluorescent probes. / Hosaka, Noriko; Obata, Masahiro; Suzuki, Motohiko; Saiki, Toshiharu; Takeda, Kenji; Kuwata-Gonokami, Makoto.

In: Applied Physics Letters, Vol. 92, No. 11, 113305, 2008.

Research output: Contribution to journalArticle

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AU - Kuwata-Gonokami, Makoto

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