Elastic carbon dot/polymer films for fluorescent tensile sensing and mechano-optical tuning
| Autor: | Sagarika Bhattacharya, Raz Jelinek, Nitzan Shauloff |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Materials science business.industry Stress–strain curve Composite number chemistry.chemical_element 02 engineering and technology General Chemistry Polymer Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence 0104 chemical sciences Blueshift chemistry Ultimate tensile strength Optoelectronics General Materials Science Deformation (engineering) 0210 nano-technology business Carbon |
| Zdroj: | Carbon. 152:363-371 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2019.06.046 |
| Popis: | Development of simple, readily-applicable sensors for mechanical deformation of polymers is highly sought albeit a formidable task. Here we demonstrate that composite films comprising carbon dots (C-dots) embedded in an elastic polymer host allow fluorescence-based quantitative determination of tensile modulation. Film stretching induced both blue shift in the C-dots' fluorescence peak positions and dramatic increase in fluorescence intensities. The phenomenon was demonstrated for different C-dots exhibiting distinct fluorescence emissions (e.g. colors). Importantly, the C-dot/polymer fluorescence intensity could be quantitatively correlated to tensile parameters, specifically film stress and strain. The direct correlation is ascribed to stretch-induced modulation of the average distances among the polymer-embedded C-dots and concomitant modification of aggregation-induced self-quenching. We further exploited the tensile-dependent fluorescence modulation of the C-dot/polymer system to construct a tunable-intensity white light emitter, opening the way to innovative mechanically-tuned optical device. |
| Databáze: | OpenAIRE |
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