Photoluminescence of bioconjugated core-shell CdSe/ZnS quantum dots

T. V. Torchynska; J. Douda; P. A. Calva; S. S. Ostapenko; R. Pea Sierra

doi:10.1116/1.3032904

Photoluminescence of bioconjugated core-shell CdSe/ZnS quantum dots

T. V. Torchynska, J. Douda, P. A. Calva, S. S. Ostapenko, R. Pea Sierra

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Abstract

This article presents the analysis of photoluminescence (PL) spectra of CdSeZnS quantum dots (QDs) with and without bioconjugation to biomolecules, Interleukin 10 (IL10) antibodies. Commercial CdSeZnS QDs used in the study are characterized by the color emission with the maximum at 605 nm (2.05 eV). It is shown that PL spectra of nonconjugated QDs can be presented as a superposition of PL bands dealing with exciton emission in the CdSe core and electron-hole emission via defect states at the CdSeZnS interface. The comparison of PL spectra of such type of CdSeZnS QDs with and without bioconjugation gives the opportunity to detect the bioconjugation without mistake. Moreover the electrostatic mechanism of bioconjugation process follows from the analyses of PL spectra of CdSeZnS QDs.

Original language	English
Pages (from-to)	836-838
Number of pages	3
Journal	Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Volume	27
Issue number	2
DOIs	https://doi.org/10.1116/1.3032904
State	Published - 2009

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@article{2762d715f9244280b0afaeeef44c6999,

title = "Photoluminescence of bioconjugated core-shell CdSe/ZnS quantum dots",

abstract = "This article presents the analysis of photoluminescence (PL) spectra of CdSeZnS quantum dots (QDs) with and without bioconjugation to biomolecules, Interleukin 10 (IL10) antibodies. Commercial CdSeZnS QDs used in the study are characterized by the color emission with the maximum at 605 nm (2.05 eV). It is shown that PL spectra of nonconjugated QDs can be presented as a superposition of PL bands dealing with exciton emission in the CdSe core and electron-hole emission via defect states at the CdSeZnS interface. The comparison of PL spectra of such type of CdSeZnS QDs with and without bioconjugation gives the opportunity to detect the bioconjugation without mistake. Moreover the electrostatic mechanism of bioconjugation process follows from the analyses of PL spectra of CdSeZnS QDs.",

author = "Torchynska, {T. V.} and J. Douda and Calva, {P. A.} and Ostapenko, {S. S.} and Sierra, {R. Pea}",

note = "Funding Information: The work was partially supported by the U.S. National Science Foundation (Award No. DMI-0253163), CONACYT Mexico (Project No. 58358), and SIP-IPN, Mexico. The authors thank Tatyana Zhukova from H. Lee Moffitt Cancer Center and Research Institute, Tampa, for her assistance at the bioconjugation of QDs.",

year = "2009",

doi = "10.1116/1.3032904",

language = "Ingl{\'e}s",

volume = "27",

pages = "836--838",

journal = "Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures",

issn = "1071-1023",

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TY - JOUR

T1 - Photoluminescence of bioconjugated core-shell CdSe/ZnS quantum dots

AU - Torchynska, T. V.

AU - Douda, J.

AU - Calva, P. A.

AU - Ostapenko, S. S.

AU - Sierra, R. Pea

N1 - Funding Information: The work was partially supported by the U.S. National Science Foundation (Award No. DMI-0253163), CONACYT Mexico (Project No. 58358), and SIP-IPN, Mexico. The authors thank Tatyana Zhukova from H. Lee Moffitt Cancer Center and Research Institute, Tampa, for her assistance at the bioconjugation of QDs.

PY - 2009

Y1 - 2009

N2 - This article presents the analysis of photoluminescence (PL) spectra of CdSeZnS quantum dots (QDs) with and without bioconjugation to biomolecules, Interleukin 10 (IL10) antibodies. Commercial CdSeZnS QDs used in the study are characterized by the color emission with the maximum at 605 nm (2.05 eV). It is shown that PL spectra of nonconjugated QDs can be presented as a superposition of PL bands dealing with exciton emission in the CdSe core and electron-hole emission via defect states at the CdSeZnS interface. The comparison of PL spectra of such type of CdSeZnS QDs with and without bioconjugation gives the opportunity to detect the bioconjugation without mistake. Moreover the electrostatic mechanism of bioconjugation process follows from the analyses of PL spectra of CdSeZnS QDs.

AB - This article presents the analysis of photoluminescence (PL) spectra of CdSeZnS quantum dots (QDs) with and without bioconjugation to biomolecules, Interleukin 10 (IL10) antibodies. Commercial CdSeZnS QDs used in the study are characterized by the color emission with the maximum at 605 nm (2.05 eV). It is shown that PL spectra of nonconjugated QDs can be presented as a superposition of PL bands dealing with exciton emission in the CdSe core and electron-hole emission via defect states at the CdSeZnS interface. The comparison of PL spectra of such type of CdSeZnS QDs with and without bioconjugation gives the opportunity to detect the bioconjugation without mistake. Moreover the electrostatic mechanism of bioconjugation process follows from the analyses of PL spectra of CdSeZnS QDs.

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DO - 10.1116/1.3032904

M3 - Artículo

SN - 1071-1023

VL - 27

SP - 836

EP - 838

JO - Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures

JF - Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures

IS - 2

ER -

Photoluminescence of bioconjugated core-shell CdSe/ZnS quantum dots

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