The effect of bio-conjugation on aging of the photoluminescence in CdSeTe-ZnS core-shell quantum dots

T. G. Kryshtab; L. V. Borkovska; O. F. Kolomys; N. O. Korsunska; V. V. Strelchuk; L. P. Germash; K. Yu Pechers'Ka; G. Chornokur; S. S. Ostapenko; C. M. Phelan; O. L. Stroyuk

doi:10.1016/j.spmi.2011.12.005

The effect of bio-conjugation on aging of the photoluminescence in CdSeTe-ZnS core-shell quantum dots

T. G. Kryshtab, L. V. Borkovska, O. F. Kolomys, N. O. Korsunska, V. V. Strelchuk, L. P. Germash, K. Yu Pechers'Ka, G. Chornokur, S. S. Ostapenko, C. M. Phelan, O. L. Stroyuk

Escuela Superior de Física y Matemáticas (ESFM)

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The aging of the photoluminescence (PL) in bio-conjugated and non-conjugated CdSeTe-ZnS core-shell quantum dots (QDs) is studied by the micro-PL, micro-Raman and X-ray diffraction (XRD) in the samples of buffered QD solution dried on a crystalline Si wafer and stored in the atmospheric ambience for about 2 years. The aging of the PL consists in a "blue" spectral shift of the PL band, an increase in PL band half-width and the decrease in the PL intensity. These changes are more pronounced in the conjugated QD samples. The XRD analysis of the aged samples revealed that the QD core diameter is reduced by ∼1.5 nm in the conjugated QDs as compared to the non-conjugated ones. The possible mechanism of PL spectrum aging is the oxidation that decreases the QD core dimension. It is concluded that the bio-conjugation promotes QD oxidation and the mechanism of the effect is proposed.

Original language	English
Pages (from-to)	353-362
Number of pages	10
Journal	Superlattices and Microstructures
Volume	51
Issue number	3
DOIs	https://doi.org/10.1016/j.spmi.2011.12.005
State	Published - Mar 2012

Keywords

Bio-conjugation
Defects
Photoluminescence
Quantum dots
Semiconducting II-VI materials
X-ray diffraction

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10.1016/j.spmi.2011.12.005

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Kryshtab, T. G., Borkovska, L. V., Kolomys, O. F., Korsunska, N. O., Strelchuk, V. V., Germash, L. P., Pechers'Ka, K. Y., Chornokur, G., Ostapenko, S. S., Phelan, C. M., & Stroyuk, O. L. (2012). The effect of bio-conjugation on aging of the photoluminescence in CdSeTe-ZnS core-shell quantum dots. Superlattices and Microstructures, 51(3), 353-362. https://doi.org/10.1016/j.spmi.2011.12.005

@article{7fc2c6d8db394aca8b7e281d87f84099,

title = "The effect of bio-conjugation on aging of the photoluminescence in CdSeTe-ZnS core-shell quantum dots",

abstract = "The aging of the photoluminescence (PL) in bio-conjugated and non-conjugated CdSeTe-ZnS core-shell quantum dots (QDs) is studied by the micro-PL, micro-Raman and X-ray diffraction (XRD) in the samples of buffered QD solution dried on a crystalline Si wafer and stored in the atmospheric ambience for about 2 years. The aging of the PL consists in a {"}blue{"} spectral shift of the PL band, an increase in PL band half-width and the decrease in the PL intensity. These changes are more pronounced in the conjugated QD samples. The XRD analysis of the aged samples revealed that the QD core diameter is reduced by ∼1.5 nm in the conjugated QDs as compared to the non-conjugated ones. The possible mechanism of PL spectrum aging is the oxidation that decreases the QD core dimension. It is concluded that the bio-conjugation promotes QD oxidation and the mechanism of the effect is proposed.",

keywords = "Bio-conjugation, Defects, Photoluminescence, Quantum dots, Semiconducting II-VI materials, X-ray diffraction",

author = "Kryshtab, {T. G.} and Borkovska, {L. V.} and Kolomys, {O. F.} and Korsunska, {N. O.} and Strelchuk, {V. V.} and Germash, {L. P.} and Pechers'Ka, {K. Yu} and G. Chornokur and Ostapenko, {S. S.} and Phelan, {C. M.} and Stroyuk, {O. L.}",

note = "Funding Information: This work was partially supported by the National Academy of Sciences of Ukraine through the program “Nanotechnologies and nanomaterials” (Grant No. 2.2.1.14/26 ).",

year = "2012",

month = mar,

doi = "10.1016/j.spmi.2011.12.005",

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volume = "51",

pages = "353--362",

journal = "Superlattices and Microstructures",

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Kryshtab, TG, Borkovska, LV, Kolomys, OF, Korsunska, NO, Strelchuk, VV, Germash, LP, Pechers'Ka, KY, Chornokur, G, Ostapenko, SS, Phelan, CM & Stroyuk, OL 2012, 'The effect of bio-conjugation on aging of the photoluminescence in CdSeTe-ZnS core-shell quantum dots', Superlattices and Microstructures, vol. 51, no. 3, pp. 353-362. https://doi.org/10.1016/j.spmi.2011.12.005

TY - JOUR

T1 - The effect of bio-conjugation on aging of the photoluminescence in CdSeTe-ZnS core-shell quantum dots

AU - Kryshtab, T. G.

AU - Borkovska, L. V.

AU - Kolomys, O. F.

AU - Korsunska, N. O.

AU - Strelchuk, V. V.

AU - Germash, L. P.

AU - Pechers'Ka, K. Yu

AU - Chornokur, G.

AU - Ostapenko, S. S.

AU - Phelan, C. M.

AU - Stroyuk, O. L.

N1 - Funding Information: This work was partially supported by the National Academy of Sciences of Ukraine through the program “Nanotechnologies and nanomaterials” (Grant No. 2.2.1.14/26 ).

PY - 2012/3

Y1 - 2012/3

N2 - The aging of the photoluminescence (PL) in bio-conjugated and non-conjugated CdSeTe-ZnS core-shell quantum dots (QDs) is studied by the micro-PL, micro-Raman and X-ray diffraction (XRD) in the samples of buffered QD solution dried on a crystalline Si wafer and stored in the atmospheric ambience for about 2 years. The aging of the PL consists in a "blue" spectral shift of the PL band, an increase in PL band half-width and the decrease in the PL intensity. These changes are more pronounced in the conjugated QD samples. The XRD analysis of the aged samples revealed that the QD core diameter is reduced by ∼1.5 nm in the conjugated QDs as compared to the non-conjugated ones. The possible mechanism of PL spectrum aging is the oxidation that decreases the QD core dimension. It is concluded that the bio-conjugation promotes QD oxidation and the mechanism of the effect is proposed.

AB - The aging of the photoluminescence (PL) in bio-conjugated and non-conjugated CdSeTe-ZnS core-shell quantum dots (QDs) is studied by the micro-PL, micro-Raman and X-ray diffraction (XRD) in the samples of buffered QD solution dried on a crystalline Si wafer and stored in the atmospheric ambience for about 2 years. The aging of the PL consists in a "blue" spectral shift of the PL band, an increase in PL band half-width and the decrease in the PL intensity. These changes are more pronounced in the conjugated QD samples. The XRD analysis of the aged samples revealed that the QD core diameter is reduced by ∼1.5 nm in the conjugated QDs as compared to the non-conjugated ones. The possible mechanism of PL spectrum aging is the oxidation that decreases the QD core dimension. It is concluded that the bio-conjugation promotes QD oxidation and the mechanism of the effect is proposed.

KW - Bio-conjugation

KW - Defects

KW - Photoluminescence

KW - Quantum dots

KW - Semiconducting II-VI materials

KW - X-ray diffraction

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U2 - 10.1016/j.spmi.2011.12.005

DO - 10.1016/j.spmi.2011.12.005

M3 - Artículo

SN - 0749-6036

VL - 51

SP - 353

EP - 362

JO - Superlattices and Microstructures

JF - Superlattices and Microstructures

IS - 3

ER -

The effect of bio-conjugation on aging of the photoluminescence in CdSeTe-ZnS core-shell quantum dots

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Keywords

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