TY - JOUR
T1 - Electronic effects in emission of core/shell CdSe/ZnS Quantum dots conjugated to anti-Interleukin 10 antibodies
AU - Douda, Janna
AU - Lopez De La Luz, Oscar S.
AU - Díaz Cano, Aaron I.
PY - 2013
Y1 - 2013
N2 - The paper presents the study of photoluminescence (PL) and Raman scattering spectra of nonconjugated and bioconjugated CdSe/ZnS core-shell quantum dots (QDs). Commercial CdSe/ZnS QDs used are characterized by color emission with the maxima at 605 nm (2.05eV) and 655 nm (1.89 eV). The QD conjugation has been performed with biomolecules - anti Interleukin-10 antibodies (anti IL10 mAb). PL spectra of nonconjugated QDs are characterized by only one symmetric PL band related to the exciton emission in the CdSe core. PL spectra of bioconjugated QDs have changed: PL band shifts into the high energy side and becomes asymmetric. To explain these effects the model has been proposed which assumes that the PL spectrum transformation in bioconjugated QDs, apparently, is connected with the quantum confinement and/or the Stark effects. To confirm the existence of electric charges (or dipoles) in the anti-Interleukin 10 antibodies, which can provoke the Stark effect, the Raman scattering spectra have been investigated as well. The enhancement of Raman scattering is observed in bioconjugated CdSe/ZnS QDs. The last effect testifies that the IL10 antibodies are characterized, actually, by the electric charges (or dipoles) that permit them to interact with an electric field of excitation light and to provoke the surface enhanced Raman scattering (SERS) and the Stark effects in QDs.
AB - The paper presents the study of photoluminescence (PL) and Raman scattering spectra of nonconjugated and bioconjugated CdSe/ZnS core-shell quantum dots (QDs). Commercial CdSe/ZnS QDs used are characterized by color emission with the maxima at 605 nm (2.05eV) and 655 nm (1.89 eV). The QD conjugation has been performed with biomolecules - anti Interleukin-10 antibodies (anti IL10 mAb). PL spectra of nonconjugated QDs are characterized by only one symmetric PL band related to the exciton emission in the CdSe core. PL spectra of bioconjugated QDs have changed: PL band shifts into the high energy side and becomes asymmetric. To explain these effects the model has been proposed which assumes that the PL spectrum transformation in bioconjugated QDs, apparently, is connected with the quantum confinement and/or the Stark effects. To confirm the existence of electric charges (or dipoles) in the anti-Interleukin 10 antibodies, which can provoke the Stark effect, the Raman scattering spectra have been investigated as well. The enhancement of Raman scattering is observed in bioconjugated CdSe/ZnS QDs. The last effect testifies that the IL10 antibodies are characterized, actually, by the electric charges (or dipoles) that permit them to interact with an electric field of excitation light and to provoke the surface enhanced Raman scattering (SERS) and the Stark effects in QDs.
KW - Raman spectroscopy
KW - luminescence
KW - nanostructure
UR - http://www.scopus.com/inward/record.url?scp=84899507915&partnerID=8YFLogxK
U2 - 10.1557/opl.2013.310
DO - 10.1557/opl.2013.310
M3 - Artículo de la conferencia
AN - SCOPUS:84899507915
SN - 0272-9172
VL - 1534
SP - A133-A138
JO - Materials Research Society Symposium Proceedings
JF - Materials Research Society Symposium Proceedings
T2 - 21st International Materials Research Congress, IMRC 2012
Y2 - 12 August 2012 through 17 August 2012
ER -