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Micro-Photoluminescence Study of Bio-conjugated CdSe/ZnS Nanocrystals

Published online by Cambridge University Press:  19 November 2013

L. Borkovska ,
N. Korsunska ,
T. Stara ,
O. Kolomys ,
V. Strelchuk ,
T. Kryshtab ,
S. Ostapenko ,
G. Chornokur  and
C. M. Phelan
L. Borkovska
Affiliation:
V. Lashkaryov Institute of Semiconductor Physics of NASU, pr. Nauky 41, 03028 Kyiv, Ukraine
N. Korsunska
Affiliation:
V. Lashkaryov Institute of Semiconductor Physics of NASU, pr. Nauky 41, 03028 Kyiv, Ukraine
T. Stara
Affiliation:
V. Lashkaryov Institute of Semiconductor Physics of NASU, pr. Nauky 41, 03028 Kyiv, Ukraine
O. Kolomys
Affiliation:
V. Lashkaryov Institute of Semiconductor Physics of NASU, pr. Nauky 41, 03028 Kyiv, Ukraine
V. Strelchuk
Affiliation:
V. Lashkaryov Institute of Semiconductor Physics of NASU, pr. Nauky 41, 03028 Kyiv, Ukraine
T. Kryshtab*
Affiliation:
Instituto Politécnico Nacional – ESFM, Av. IPN, Ed. 9, U.P.A.L.M., 07738 Mexico D.F., Mexico
S. Ostapenko
Affiliation:
H Lee Moffitt Cancer Center and Research Institute, Tampa, Fl-33612, USA
G. Chornokur
Affiliation:
H Lee Moffitt Cancer Center and Research Institute, Tampa, Fl-33612, USA
C. M. Phelan
Affiliation:
H Lee Moffitt Cancer Center and Research Institute, Tampa, Fl-33612, USA
*
*E-mail:[email protected]; [email protected]
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Abstract

The effect of bio-conjugation of CdSe/ZnS core-shell quantum dots (QDs) with Interleukin 10 (IL-10) antibodies on the aging of photoluminescence (PL) spectra of the QDs was investigated. The aging occurred upon storage of QDs for about 2 years or thermal annealing at 190 oC for up to 12 hours at atmospheric ambience and consisted in “blue” shifting the PL band position, increasing a PL band half-width and decreasing the PL intensity. The bio-conjugation is found to promote PL aging. The aging upon storage is attributed to the oxidation that decreases the QD core dimension, while the aging upon thermal annealing can be due to both oxidation and alloying of CdSe core and ZnS shell.

Keywords

luminescencecolloidal particlesBio-conjugation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1617: Symposium 7E – Low-Dimensional Semiconductor Structures , 2013 , pp. 157 - 162
Copyright
Copyright © Materials Research Society 2013 

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References

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