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Non-linear effects in the quenching of fluorescent semiconductor nanoparticles by paramagnetic species

✍ Scribed by Scaiano, J. C. ;Laferrière, Marie ;Galian, Raquel E. ;Maurel, Vincent ;Billone, Paul

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
278 KB
Volume
203
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Quenching of quantum dot luminescence by nitroxides shows steep exponential behavior and is dependent on nanoparticle size, being most effective for the smaller particles. The interaction of CdSe nanoparticles with TEMPO (non‐binding) and 4‐amino‐TEMPO (binding) has been examined using fluorescence and electron spin resonance techniques. The data suggest that quenching involves an electron exchange mechanism. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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