Emission variation in CdSe/ZnS quantum dots conjugated to papilloma virus antibodies

Research output: Contribution to conferencePaper

Abstract

The paper presents a comparative study of the photoluminescence (PL) and Raman scattering spectra of core-shell CdSe/ZnS quantum dots (QDs) in nonconjugated states and after the conjugation to the anti-human papilloma virus (HPV), HPV 16-E7, antibodies. All optical measurements are performed on the dried droplets of the original solution of nonconjugated and bioconjugated QDs located on the Si substrate. CdSe/ZnS QDs with emission at 655 nm have been used. PL spectra of nonconjugated QDs are characterized by one Gaussian shape PL band related to the exciton emission in the CdSe core. PL spectra of bioconjugated QDs have changed essentially: the core PL band shifts into the high energy spectral range ("blue" sift) and becomes asymmetric. A set of physical reasons has been proposed for the "blue" shift explanation of the core PL band in bioconjugated QDs. The variation of PL spectra versus excitation light intensities has been studied to analyses the exciton emission via excited states in QDs. Finally the PL spectrum transformation for the core emission in bioconjugated QDs has been attributed to the electronic quantum confined effects stimulated by the electric charges of bioconjugated antibodies. Copyright © Materials Research Society 2013.
Original languageAmerican English
Pages139-144
Number of pages124
DOIs
StatePublished - 1 Jan 2013
Externally publishedYes
EventMaterials Research Society Symposium Proceedings -
Duration: 1 Jan 2014 → …

Conference

ConferenceMaterials Research Society Symposium Proceedings
Period1/01/14 → …

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viruses
antibodies
Viruses
Antibodies
Semiconductor quantum dots
Photoluminescence
quantum dots
photoluminescence
Excitons
Quantum electronics
excitons
quantum electronics
Electric charge
electric charge
conjugation
optical measurement
blue shift
Excited states
luminous intensity
excitation

Cite this

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title = "Emission variation in CdSe/ZnS quantum dots conjugated to papilloma virus antibodies",
abstract = "The paper presents a comparative study of the photoluminescence (PL) and Raman scattering spectra of core-shell CdSe/ZnS quantum dots (QDs) in nonconjugated states and after the conjugation to the anti-human papilloma virus (HPV), HPV 16-E7, antibodies. All optical measurements are performed on the dried droplets of the original solution of nonconjugated and bioconjugated QDs located on the Si substrate. CdSe/ZnS QDs with emission at 655 nm have been used. PL spectra of nonconjugated QDs are characterized by one Gaussian shape PL band related to the exciton emission in the CdSe core. PL spectra of bioconjugated QDs have changed essentially: the core PL band shifts into the high energy spectral range ({"}blue{"} sift) and becomes asymmetric. A set of physical reasons has been proposed for the {"}blue{"} shift explanation of the core PL band in bioconjugated QDs. The variation of PL spectra versus excitation light intensities has been studied to analyses the exciton emission via excited states in QDs. Finally the PL spectrum transformation for the core emission in bioconjugated QDs has been attributed to the electronic quantum confined effects stimulated by the electric charges of bioconjugated antibodies. Copyright {\circledC} Materials Research Society 2013.",
author = "{Jaramillo G{\'o}mez}, {Juan A.} and Torchynska, {Tetyana V.} and {Casas Espinola}, {Jose L.} and Janna Douda",
year = "2013",
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doi = "10.1557/opl.2013.1176",
language = "American English",
pages = "139--144",
note = "Materials Research Society Symposium Proceedings ; Conference date: 01-01-2014",

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Emission variation in CdSe/ZnS quantum dots conjugated to papilloma virus antibodies. / Jaramillo Gómez, Juan A.; Torchynska, Tetyana V.; Casas Espinola, Jose L.; Douda, Janna.

2013. 139-144 Paper presented at Materials Research Society Symposium Proceedings, .

Research output: Contribution to conferencePaper

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