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Electrofluorescence switching of tetrazine-modified TiO nanoparticles

Nanoscale, ISSN: 2040-3364, Vol: 5, Issue: 16, Page: 7321-7327
2013
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Article Description

Highly fluorescent tetrazine-modified TiO nanoparticles were prepared by the reaction of triethoxysilane-appended chloroalkoxy tetrazine (ESTZ) with TiO nanoparticles through a condensation reaction between the surface hydroxyl groups of an electrode and the silane anchor group of ESTZ. The prepared electrodes were used as robust fluorescent layers for electrochemical fluorescence switching (electrofluorochromism) applications in the presence of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) as a charge balancing mediator. The stable charge balancing mediator, TEMPO, in the electrolyte was found to be essential to reduce the intrinsic electron transport resistance of TiO in order to achieve reversible electrofluorescence switching. Furthermore it facilitated a fully reversible electrochemical reaction and provided a sufficient charge balance, which allowed us to realize semiconductor-based electrofluorescence switching with an on/off ratio of 4.0 and cyclability greater than 100 cycles. © 2013 The Royal Society of Chemistry.

Bibliographic Details

Seo, Seogjae; Allain, Clémence; Na, Jongbeom; Kim, Sehwan; Yang, Xu; Park, Chihyun; Malinge, Jérémy; Audebert, Pierre; Kim, Eunkyoung

Royal Society of Chemistry (RSC)

Materials Science

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