ArticleACS nano2011
Probing the "dark" fraction of core-shell quantum dots by ensemble and single particle pH-dependent spectroscopy.
Article in ACS nano, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
13 citing papers in PubMed, 77 citations in OpenAlex.
- Quantum Dot Fluorescent Imaging: Using Atomic Structure Correlation Studies to Improve Photophysical Properties.The journal of physical chemistry. C, Nanomaterials and interfaces · 2024Review
- Compact, Fast Blinking Cd-Free Quantum Dots for Super-Resolution Fluorescence Imaging.Chemical & biomedical imaging · 2023Article
- Far Red-Shifted CdTe Quantum Dots for Multicolour Stimulated Emission Depletion Nanoscopy.Chemphyschem : a European journal of chemical physics and physical chemistry · 2023Article
- Microenvironmental Impact on InP/ZnS-Based Quantum Dots in In Vitro Models and in Living Cells: Spectrally- and Time-Resolved Luminescence Analysis.International journal of molecular sciences · 2023Article
- Trapping and Detrapping in Colloidal Perovskite Nanoplatelets: Elucidation and Prevention of Nonradiative Processes through Chemical Treatment.The journal of physical chemistry. C, Nanomaterials and interfaces · 2020Article
- Excitonic Energy Transfer within InP/ZnS Quantum Dot Langmuir-Blodgett Assemblies.The journal of physical chemistry. C, Nanomaterials and interfaces · 2018Article
- Targeting breast cancer cells with a CuInSOncology letters · 2018Article
- Influence of the Inner-Shell Architecture on Quantum Yield and Blinking Dynamics in Core/Multishell Quantum Dots.Chemphyschem : a European journal of chemical physics and physical chemistry · 2016Article
- Visible-light photocatalyzed cross-linking of diacetylene ligands by quantum dots to improve their aqueous colloidal stability.The journal of physical chemistry. B · 2014Article
- 3D imaging of flow patterns in an internally-pumped microfluidic device: redox magnetohydrodynamics and electrochemically-generated density gradients.Analytical chemistry · 2013Article
- Radiative and Non-Radiative Lifetime Engineering of Quantum Dots in Multiple Solvents by Surface Atom Stoichiometry and Ligands.The journal of physical chemistry. C, Nanomaterials and interfaces · 2013Article
- Cadmium-free quantum dots as time-gated bioimaging probes in highly-autofluorescent human breast cancer cells.Chemical communications (Cambridge, England) · 2013Article
- Photoluminescence intermittency from single quantum dots to organic molecules: emerging themes.International journal of molecular sciences · 2012Review
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
Abstract
The optical properties of core-shell CdSe-ZnS quantum dots (QDs) are characterized by complex photophysics leading to difficulties in interpreting quantitative measurements based on QD emission. By comparing the pH dependence of fluorescence of single QDs to that of an ensemble, we have been able to propose a molecular scale model of how QD surface chemical and physical processes are affected by protons and oxygen. We show that the connection between the ensemble fluorescence intensity and the single QD fluorescence properties such as dark fraction, blinking, particle brightness, and a multiexponential fluorescence lifetime decay is not trivial. The ensemble fluorescence intensity is more weakly dependent on pH than the single particle fluorescence which, together with fluorescence lifetime analysis, provided evidence that the dark fraction of QDs emits photons with low quantum efficiency and long lifetime. We uncovered two surface-dependent mechanisms that affected the fluorescence emission: an immediate physical effect of charges surrounding the QD and an irreversible chemical effect from reaction of the H(+) and O(2) with the QD shell surface. These results will have important implications for those using QD-based fluorescence lifetime imaging as well as for proper implementation of these probes for quantitative cellular imaging applications.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.