Accidental Contamination of Substrates and Polymer Films by Organic Quantum Emitters.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30985126.
- Also identified by DOI 10.1021/acs.nanolett.9b00712 and PMC identifier 6542549.
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Abstract
We report the observation of ubiquitous contamination of dielectric substrates and poly(methyl methacrylate) matrices by organic molecules with optical transitions in the visible spectral range. Contamination sites of individual solvent-related fluorophores in thin films of poly(methyl methacrylate) constitute fluorescence hotspots with quantum emission statistics and quantum yields approaching 30% at cryogenic temperatures. Our findings not only resolve prevalent puzzles in the assignment of spectral features to various nanoemitters on bare dielectric substrates or in polymer matrices but also identify the means for the simple and cost-efficient realization of single-photon sources in the visible spectral range.