تقرير
In situ synthesis of polyynes in a polymer matrix by pulsed laser ablation in liquid
| العنوان: | In situ synthesis of polyynes in a polymer matrix by pulsed laser ablation in liquid |
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| المؤلفون: | Peggiani, Sonia, Facibeni, Anna, Milani, Alberto, Castiglioni, Chiara, Russo, Valeria, Bassi, Andrea Li, Casari, Carlo S. |
| المصدر: | RSC Materials Advances 1, 2729 (2020) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Applied Physics, Condensed Matter - Materials Science |
| الوصف: | Polyynes are finite chains formed by sp-hybridized carbon atoms with alternating single and triple bonds and displaying intriguing electronic and optical properties. Pulsed laser ablation in liquid (PLAL) is a well assessed technique for the physical synthesis of hydrogen-capped polyynes in solution, however, their limited stability prevents further exploitation in materials for different applications. In this work, polyynes in poly(vinyl alcohol) (PVA) were produced in a single-step PLAL process by ablating graphite directly in aqueous solution of PVA, investigating the role of polymer concentration. The presence of PVA solution, as a participating medium for PLAL, is shown to favour the formation of polyynes. The addition of Ag colloids to the aqueous PVA/polyynes solution allowed surface-enhanced Raman spectroscopy (SERS) measurements, carried out both on liquid samples and on free-standing nanocomposites, obtained after solvent evaporation. We show that polyynes in the nanocomposite remain stable at least for 11 months, whereas the corresponding PVA/Ag/polyynes solution displayed a strong polyyne reduction already after 3 weeks. These results open the view to further characterizations of the properties of polyyne-based films and materials. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1039/d0ma00545b |
| URL الوصول: | http://arxiv.org/abs/2006.15025 |
| رقم الأكسشن: | edsarx.2006.15025 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1039/d0ma00545b |
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