Rapid degradation of CdSe/ZnS colloidal quantum dots exposed to gamma irradiation

Withers, Nathan J.; Sankar, Krishnaprasad; Akins, Brian A.; Memon, Tosifa A.; Gu, Tingyi; Gu, Jiangjiang; Smolyakov, Gennady A.; Greenberg, Melisa R.; Boyle, Timothy J.; Osinski, Marek
October 2008
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p173101
Academic Journal
Effects of 137Cs gamma irradiation on photoluminescent properties of CdSe/ZnS colloidal quantum dots are reported. Optical degradation is evaluated by tracking the dependence of photoluminescence intensity on irradiation dose. CdSe/ZnS quantum dots show poor radiation hardness, and severely degrade after less than 20 kR exposure to 662 keV gamma photons.


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