Addition of Fluorescence Lifetime Spectroscopy to the Tool Kit Used to Study the Formation and Degradation of Luminescent Quantum Dots in Solution

dc.contributor.authorLyons, Taeyjuana
dc.contributor.authorWilliams, Denise N.
dc.contributor.authorRosenzweig, Zeev
dc.date.accessioned2021-04-14T17:49:32Z
dc.date.available2021-04-14T17:49:32Z
dc.date.issued2017-02-28
dc.description.abstractThe increasing commercialization of consumer electronic products that make use of II–VI semiconductor quantum dots (QDs) has raised significant concerns about their impact on natural systems and human health once they are released into the environment at the end of the product’s lifetime. In this paper, we demonstrate the addition of fluorescence lifetime spectroscopy to the existing tool kit of spectroscopic techniques to quantitatively monitor changes in QD properties as they form and degrade in solution. Our study reveals that because of its rich information content, fluorescence lifetime spectroscopy has a limited utility as a stand-alone technique in the study of QD formation and degradation. However, combining fluorescence lifetime spectroscopy with the commonly used emission quantum yield and peak width measurements along with other analytical methods, including ultraviolet–visible spectroscopy, transmission electron microscopy, and inductively coupled plasma mass spectrometry measurements, significantly enhances the existing analytical tool kit and provides the capability to monitor in real time, the formation and degradation of luminescent QDs in organic and aqueous solutions under environmentally relevant conditions.en_US
dc.description.sponsorshipThis study was supported by NSF award CHE-1506995. TEM measurements were performed at the National Institute of Standards and Technology (NIST) Center for Nanoscale Science and Technology. The authors thank Dr. Alline Myers of NIST for her assistance with TEM imaging and Drs. Kimihiro Susumu and Igor Medintz of the U. S. Naval Research Laboratory for their assistance in the QD synthesis.en_US
dc.description.urihttps://pubs.acs.org/doi/10.1021/acs.langmuir.6b04400en_US
dc.format.extent2 filesen_US
dc.genrejournal articles preprintsen_US
dc.identifierdoi:10.13016/m2txjs-m7br
dc.identifier.citationLyons, Taeyjuana Y.; Williams, Denise N.; Rosenzweig, Zeev; Addition of Fluorescence Lifetime Spectroscopy to the Tool Kit Used to Study the Formation and Degradation of Luminescent Quantum Dots in Solution; Langmuir 33, 12, 3018–3027 (2017); https://pubs.acs.org/doi/10.1021/acs.langmuir.6b04400en_US
dc.identifier.urihttps://doi.org/10.1021/acs.langmuir.6b04400
dc.identifier.urihttp://hdl.handle.net/11603/21337
dc.language.isoen_USen_US
dc.publisherACS Publicationsen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Chemistry & Biochemistry Department Collection
dc.relation.ispartofUMBC Student Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsThis document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Langmuir, copyright © American Chemical Society after peer review. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.langmuir.6b04400 .
dc.titleAddition of Fluorescence Lifetime Spectroscopy to the Tool Kit Used to Study the Formation and Degradation of Luminescent Quantum Dots in Solutionen_US
dc.typeTexten_US

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