ArticleProceedings of the National Academy of Sciences of the United States of America2015
Mesoscopic quantum emitters from deterministic aggregates of conjugated polymers.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Discovery of Crystallized and Weakly Coupled Aggregates of Pseudocyanine Iodide.The journal of physical chemistry. B · 2026Article
- Donor-Acceptor-Donor Small-Molecular Dots are Brighter than Polymer Dots of Similar Chromophore Units.ACS applied materials & interfaces · 2025Article
- Cationic conjugated polymers with tunable hydrophobicity for efficient treatment of multidrug-resistant wound biofilm infections.Biomaterials · 2025Article
- Detection of Single Charge Trapping Defects in Semiconductor Particles by Evaluating Photon Antibunching in Delayed Photoluminescence.Nano letters · 2023Article
- Metamaterial Analogues of Strongly Coupled Molecular Ensembles.ACS photonics · 2021Article
- Picosecond time-resolved photon antibunching measures nanoscale exciton motion and the true number of chromophores.Nature communications · 2021Article
- Control of Intrachain Morphology in the Formation of Polyfluorene Aggregates on the Single-Molecule Level.Chemphyschem : a European journal of chemical physics and physical chemistry · 2020Article
- Metamaterial Analogues of Molecular Aggregates.ACS photonics · 2019Article
- Effects of molecular architecture on morphology and photophysics in conjugated polymers: from single molecules to bulk.Chemical science · 2018Review
- Switching between H- and J-type electronic coupling in single conjugated polymer aggregates.Nature communications · 2017Article
- Controlling photophysical properties of ultrasmall conjugated polymer nanoparticles through polymer chain packing.Nature communications · 2017Article
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Authors and funding
6 authors.
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Abstract
An appealing definition of the term "molecule" arises from consideration of the nature of fluorescence, with discrete molecular entities emitting a stream of single photons. We address the question of how large a molecular object may become by growing deterministic aggregates from single conjugated polymer chains. Even particles containing dozens of individual chains still behave as single quantum emitters due to efficient excitation energy transfer, whereas the brightness is raised due to the increased absorption cross-section of the suprastructure. Excitation energy can delocalize between individual polymer chromophores in these aggregates by both coherent and incoherent coupling, which are differentiated by their distinct spectroscopic fingerprints. Coherent coupling is identified by a 10-fold increase in excited-state lifetime and a corresponding spectral red shift. Exciton quenching due to incoherent FRET becomes more significant as aggregate size increases, resulting in single-aggregate emission characterized by strong blinking. This mesoscale approach allows us to identify intermolecular interactions which do not exist in isolated chains and are inaccessible in bulk films where they are present but masked by disorder.
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