Radiative interface state study in CdSe/ZnS quantum dots covered by polymer

L. G.Vega MacOtela, T. V. Torchynska, J. Douda, R. Peña Sierra, L. Shcherbyna

Resultado de la investigación: Contribución a una revistaArtículo

6 Citas (Scopus)

Resumen

The paper presents the transformation of photoluminescence (PL) spectra of nonconjugated and bioconjugated core/shell CdSe/ZnS QDs covered by PEG polymer at the aging in ambient air. Studied QDs are characterized by the sizes: (i) 3.6-4.0 nm and color emission with the maxima at 560-565 nm (2.19-2.25 eV) and (ii) 5.2-5.3 nm and with emission at 605-610 nm (2.02-2.08 eV). The part of 565 nm CdSe/ZnS QDs has been bioconjugated to the mouse anti PSA (Prostate-Specific Antigen) antibodies and the part of 605 nm QDs has been bioconjugated to the antihuman IL10 (Interleukin 10) antibodies using the commercially available 565 nm and 605 nm QD conjugation kits. It is revealed that the aging process in ambient air has the very strong impact on PL spectra of nonconjugated core/shell CdSe/ZnS QDs covered with PEG polymer. The aging process relates to the polymer modification in ambient air that is accompanied by the three effects: (i) polymer transparency increasing for the emission of CdSe cores (2.03 or 2.20 eV), (ii) the intensity stimulation of high energy PL bands (2.37, 2.73 and 3.06 eV) related to the interface states at the ZnS/PEG polymer interface and (iii) the elastic strain modification in QD systems. The concentration of interface states at the ZnS/polymer interface increases at the aging of PEG polymer in ambient air.

Idioma originalInglés
Páginas (desde-hasta)1349-1352
Número de páginas4
PublicaciónMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volumen176
N.º17
DOI
EstadoPublicada - 25 oct 2011

Huella dactilar

Interface states
Semiconductor quantum dots
Polymers
quantum dots
polymers
Polyethylene glycols
Aging of materials
Photoluminescence
air
Air
antibodies
photoluminescence
Antibodies
interleukins
kits
antigens
Prostate-Specific Antigen
Antigens
conjugation
stimulation

Citar esto

MacOtela, L. G.Vega ; Torchynska, T. V. ; Douda, J. ; Sierra, R. Peña ; Shcherbyna, L. / Radiative interface state study in CdSe/ZnS quantum dots covered by polymer. En: Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 2011 ; Vol. 176, N.º 17. pp. 1349-1352.
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abstract = "The paper presents the transformation of photoluminescence (PL) spectra of nonconjugated and bioconjugated core/shell CdSe/ZnS QDs covered by PEG polymer at the aging in ambient air. Studied QDs are characterized by the sizes: (i) 3.6-4.0 nm and color emission with the maxima at 560-565 nm (2.19-2.25 eV) and (ii) 5.2-5.3 nm and with emission at 605-610 nm (2.02-2.08 eV). The part of 565 nm CdSe/ZnS QDs has been bioconjugated to the mouse anti PSA (Prostate-Specific Antigen) antibodies and the part of 605 nm QDs has been bioconjugated to the antihuman IL10 (Interleukin 10) antibodies using the commercially available 565 nm and 605 nm QD conjugation kits. It is revealed that the aging process in ambient air has the very strong impact on PL spectra of nonconjugated core/shell CdSe/ZnS QDs covered with PEG polymer. The aging process relates to the polymer modification in ambient air that is accompanied by the three effects: (i) polymer transparency increasing for the emission of CdSe cores (2.03 or 2.20 eV), (ii) the intensity stimulation of high energy PL bands (2.37, 2.73 and 3.06 eV) related to the interface states at the ZnS/PEG polymer interface and (iii) the elastic strain modification in QD systems. The concentration of interface states at the ZnS/polymer interface increases at the aging of PEG polymer in ambient air.",
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Radiative interface state study in CdSe/ZnS quantum dots covered by polymer. / MacOtela, L. G.Vega; Torchynska, T. V.; Douda, J.; Sierra, R. Peña; Shcherbyna, L.

En: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, Vol. 176, N.º 17, 25.10.2011, p. 1349-1352.

Resultado de la investigación: Contribución a una revistaArtículo

TY - JOUR

T1 - Radiative interface state study in CdSe/ZnS quantum dots covered by polymer

AU - MacOtela, L. G.Vega

AU - Torchynska, T. V.

AU - Douda, J.

AU - Sierra, R. Peña

AU - Shcherbyna, L.

PY - 2011/10/25

Y1 - 2011/10/25

N2 - The paper presents the transformation of photoluminescence (PL) spectra of nonconjugated and bioconjugated core/shell CdSe/ZnS QDs covered by PEG polymer at the aging in ambient air. Studied QDs are characterized by the sizes: (i) 3.6-4.0 nm and color emission with the maxima at 560-565 nm (2.19-2.25 eV) and (ii) 5.2-5.3 nm and with emission at 605-610 nm (2.02-2.08 eV). The part of 565 nm CdSe/ZnS QDs has been bioconjugated to the mouse anti PSA (Prostate-Specific Antigen) antibodies and the part of 605 nm QDs has been bioconjugated to the antihuman IL10 (Interleukin 10) antibodies using the commercially available 565 nm and 605 nm QD conjugation kits. It is revealed that the aging process in ambient air has the very strong impact on PL spectra of nonconjugated core/shell CdSe/ZnS QDs covered with PEG polymer. The aging process relates to the polymer modification in ambient air that is accompanied by the three effects: (i) polymer transparency increasing for the emission of CdSe cores (2.03 or 2.20 eV), (ii) the intensity stimulation of high energy PL bands (2.37, 2.73 and 3.06 eV) related to the interface states at the ZnS/PEG polymer interface and (iii) the elastic strain modification in QD systems. The concentration of interface states at the ZnS/polymer interface increases at the aging of PEG polymer in ambient air.

AB - The paper presents the transformation of photoluminescence (PL) spectra of nonconjugated and bioconjugated core/shell CdSe/ZnS QDs covered by PEG polymer at the aging in ambient air. Studied QDs are characterized by the sizes: (i) 3.6-4.0 nm and color emission with the maxima at 560-565 nm (2.19-2.25 eV) and (ii) 5.2-5.3 nm and with emission at 605-610 nm (2.02-2.08 eV). The part of 565 nm CdSe/ZnS QDs has been bioconjugated to the mouse anti PSA (Prostate-Specific Antigen) antibodies and the part of 605 nm QDs has been bioconjugated to the antihuman IL10 (Interleukin 10) antibodies using the commercially available 565 nm and 605 nm QD conjugation kits. It is revealed that the aging process in ambient air has the very strong impact on PL spectra of nonconjugated core/shell CdSe/ZnS QDs covered with PEG polymer. The aging process relates to the polymer modification in ambient air that is accompanied by the three effects: (i) polymer transparency increasing for the emission of CdSe cores (2.03 or 2.20 eV), (ii) the intensity stimulation of high energy PL bands (2.37, 2.73 and 3.06 eV) related to the interface states at the ZnS/PEG polymer interface and (iii) the elastic strain modification in QD systems. The concentration of interface states at the ZnS/polymer interface increases at the aging of PEG polymer in ambient air.

KW - Aging

KW - Antibodies

KW - Bioconjugation

KW - Interleukin IL10

KW - Mouse anti PSA

KW - PEG

KW - Polymer

KW - Quantum dots

UR - http://www.scopus.com/inward/record.url?scp=80052816688&partnerID=8YFLogxK

U2 - 10.1016/j.mseb.2011.05.007

DO - 10.1016/j.mseb.2011.05.007

M3 - Artículo

AN - SCOPUS:80052816688

VL - 176

SP - 1349

EP - 1352

JO - Materials Science and Engineering B

JF - Materials Science and Engineering B

SN - 0921-5107

IS - 17

ER -