NDLI: Studies of the photostability of CdSe/CdS dot-in-rod nanoparticles

Content Provider	Springer Nature Link
Author	Wen, Xiaoming Sitt, Amit Yu, Pyng Ko, Hsien chen Toh, Yon Rui Tang, Jau
Copyright Year	2012
Abstract	Fluorescent CdSe/CdS dot-in-rod nanoparticles have attracted considerable interest for fundamental research and potential applications in bioscience and physical science. In this work, we investigated photoinduced phenomena in CdSe/CdS dot-in-rods using time-resolved photoluminescence (PL). Our experimental results show that photopassivation, photooxidation, and photoinduced defect/surface states occur in CdSe/CdS dot-in-rods, and these processes depend on the irradiation amount. The thickness of the CdS shell plays an important role for photostability. Photopassivation was found to initially result in an increase of PL intensity when fluence is low. Photooxidation was found to cause a spectral blue shift due to shrinkage of the core. We also found that a thick shell of CdS can effectively suppress photooxidation and hinder the diffusion of oxygen into the core. Irradiation could generate defect/surface states predominantly in the shell and also on the interface between the core and the shell. A weak PL shoulder in the blue side was observed in heavily irradiated samples as a result of photoinduced rupture of encapsulation.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	14
Issue Number	12
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-11-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CdSe/CdS dot-in-rod Photooxidation Photopassivation Fluorescence Seeded growth Nanotechnology Inorganic Chemistry Characterization and Evaluation of Materials Physical Chemistry Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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