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ۼ : 17-08-29 09:02
[2017.08] 輺 Light-Induced Fluorescence Modulation of Quantum Dot-Crystal Violet Conjugates: Stochastic Off–On–Off Cycles for Multicolor Patterning and Super-Resolution
 ۾ :
ȸ : 375  

Light-Induced Fluorescence Modulation of Quantum Dot-Crystal Violet Conjugates: Stochastic Off–On–Off Cycles for Multicolor Patterning and Super-Resolution


Sungwook Jung, Joonhyuck Park, Jiwon Bang, Jae-Yeol Kim, Cheolhee Kim, Yongmoon Jeon, Seung Hwan Lee, Ho Jin, Sukyung Choi, Bomi Kim, Woo Jin Lee,Chan-Gi Pack, Jong-Bong Lee, Nam Ki Lee, and Sungjee Kim* (Author Contributions: S. Jung and J. Park contributed equally.)


Ŀ(~mW/cm2) ñ ȣ Ͼ -ũŻ ̿÷(Crystal violet, CV) ü ռϿ. ش ü Ŀ ñ Ǵ ȯ濡 ұǾ ִ ȸǰ, ٽ ұǴ 3ܰ Ͽ. ش -CV ü -CV ü ü ʸ ϸ, / ̿Ͽ ʸ ¿ . ԽŲ -CV ü ñ 翡 Ͽ ¿ ϰ 10 ߱ ǥ . -CV ü Ͽ, QD-CV Ư QD ɼ ̿Ͽ CCD ȼ 2 þ ̿Ͽ ȸ Ѱ ̸ и ٸ ߱ϴ 4 QDCV ÿ иϿ ʰش ־. ̷ ȭ о ְ ϳ Journal of the American Chemical Society (JACS) Ǿ.

 

We report a visible light-induced facile modulation route for QD-dye conjugates. QD crystal violets conjugates (QD-CVs) were prepared and the crystal violet (CV) molecules on QD quenched the fluorescence efficiently. The fluorescence of QD-CVs showed a single cycle of emission burst as they go through three stages of (i) initially quenched off to (ii) photoactivated on as the result of chemical change of CVs induced by photoelectrons from QD and (iii) back to photodarkened off by radical-associated reactions. Multicolor on-demand photopatterning was demonstrated using QD-CV solid films. QD-CVs were introduced into cells, and excitation with visible light yielded photomodulation from off to on and off by nearly ten fold. Individual photoluminescence dynamics of QD-CVs was investigated using fluorescence correlation spectroscopy and single QD emission analysis, which revealed temporally stochastic photoactivations and photodarkenings. Exploiting the stochastic fluorescence burst of QD-CVs, simultaneous multicolor super-resolution localizations were demonstrated.


 
 

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