TITLE

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

AUTHOR(S)
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
PUB. DATE
October 2008
SOURCE
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p173101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
35279119

 

Related Articles

  • Coherent Control of the Quasi-Elastic Resonant Secondary Emission: Semiconductor Quantum Dots. Fedorov, A. V.; Baranov, A. V.; Masumoto, Y. // Optics & Spectroscopy;May2002, Vol. 92 Issue 5, p732 

    A detailed theoretical study of the time-integrated signal of spontaneous quasi-elastic secondary emission excited by a pair of phase-locked pulses has shown that coherent control is a promising method for measuring the total dephasing rate of a resonant optical transition. This method may be...

  • Quasielastic scattering of light by a photoexcited electron�hole plasma induced in a GaAs layer in the presence of InAs quantum dots. Bairamov, B. Kh.; Voitenko, V. A.; Zakharchenya, B. P.; Toporov, V. V.; Henini, M.; Kent, A. J. // JETP Letters;6/10/98, Vol. 67 Issue 11, p972 

    The development of a method for registering quasielastic electronic light scattering spectra in the near-IR region, which makes it possible to detect light scattering by a photoexcited electron-hole plasma induced in a GaAs layer in the presence of a self-organized ensemble of InAs quantum dots,...

  • A new method for studying the hardness-intensity correlation in gamma-ray bursts. Ryde, Felix; Borgonovo, Luis; Svensson, Roland // AIP Conference Proceedings;2000, Vol. 526 Issue 1, p180 

    We introduce a new method to study the hardness-intensity correlation (HIC) within gamma-ray bursts, in which the intensity is represented by the peak value of the EF[sub E] spectrum. We compare it to the traditional method where the intensity over a finite energy range is used. This new method...

  • Track jumps in hardness-intensity correlations of GRB pulse decays. Borgonovo, Luis; Ryde, Felix // AIP Conference Proceedings;2000, Vol. 526 Issue 1, p130 

    The hardness-intensity correlation (HIC) during the decay phase of gamma-ray burst pulses can often be described by a simple power law. The pulse decays in multi-pulse bursts present power-law indices that are equal to within the errors. We find that in some pulses the HIC changes to a parallel...

  • A compact x-ray beam intensity monitor using gas amplified sample current measurement. Hayakawa, Shinjiro; Castellini, P.; Kobayashi, Kazuo; Revel, G.M.; Gohshi, Yohichi // Review of Scientific Instruments;Jan2000, Vol. 71 Issue 1 

    Development of a compact beam intensity monitor using gas amplified sample current measurement is described. The monitor can be a powerful tool for x-ray spectroscopy and microscopy when the beam is defined by a small pinhole or slits and when the workspace around the sample is limited. The...

  • Red single-photon emission from an InP/GaInP quantum dot embedded in a planar monolithic microcavity. Roßbach, Robert; Reischle, Matthias; Beirne, Gareth J.; Jetter, Michael; Michler, Peter // Applied Physics Letters;2/18/2008, Vol. 92 Issue 7, p071105 

    Using micro-photoluminescence, we demonstrate single-photon emission in the visible (red) spectral range using self-assembled InP quantum dots embedded in a planar microcavity realized by monolithically grown high reflectivity AlGaAs distributed Bragg reflectors. A full width at half maximum of...

  • Nonresonant feeding of photonic crystal nanocavity modes by quantum dots. Laucht, A.; Hauke, N.; Neumann, A.; Günthner, T.; Hofbauer, F.; Mohtashami, A.; Müller, K.; Böhm, G.; Bichler, M.; Amann, M.-C.; Kaniber, M.; Finley, J. J. // Journal of Applied Physics;May2011, Vol. 109 Issue 10, p102404 

    We experimentally probe the nonresonant feeding of photons into the optical mode of a two dimensional photonic crystal nanocavity from the discrete emission from a quantum dot. For a strongly coupled system of a single exciton and the cavity mode, we track the detuning-dependent...

  • Study of Quantum Yield and Photoluminescence of Thiol Capped CdS Nanocrystallites. Majumder, Manisree; Karan, Santanu; Sanyal, Manik Kumar; Chakraborty, Aloke Kumar; Mallik, Biswanath // AIP Conference Proceedings;6/29/2009, Vol. 1147 Issue 1, p145 

    For the preparation of thiol capped CdS nanocrystallites, the microwave (MW) assisted reaction of cadmium acetate with thiourea in N, N-dimethylformamide (DMF) was controlled in the presence of two capping agents, 1-butanethiol and 2-mercaptoethanol. The peak position of the absorption band of...

  • MODIFICATION OF (CdSe)ZnS QUANTUM DOTS BY UV/VIS IRRADIATION. Milauskas, Darius; Karabanovas, Vitalijus; Ramanavičius, Arųnas; Rotomskis, Ričardas // International Conference: Radiation Interaction with Material & ;2006, p112 

    Physical methods could become very important and influential to reach precision results in modern biopolymerization. Due to quantum dots tuneable luminescence wavelength and high photostability compared to organic dyes, they are attractive candidates for fluorescence markers in biolabeling. In...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics