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Electromechanical coupling through piezoelectric polymer chains allows the emission of organic molecules in active nanowires to be tuned. This effect is evidenced by highly bendable arrays of counter‐ion dye‐doped nanowires made of a poly(vinylidenefluoride) copolymer. A reversible redshift of the dye emission is found upon the application of dynamic stress during highly accurate bending experiments. By density functional theory calculations it is found that these photophysical properties are associated with mechanical stresses applied to electrostatically interacting molecular systems, namely to counterion‐mediated states that involve light‐emitting molecules as well as charged regions of piezoelectric polymer chains. These systems are an electrostatic class of supramolecular functional stress‐sensitive units, which might impart new functionalities in hybrid molecular nanosystems and anisotropic …
Publication date: 
1 Aug 2017

Luana Persano, Andrea Camposeo, Aleksandr V Terentjevs, Fabio Della Sala, Eduardo Fabiano, Martina Montinaro, Dario Pisignano

Biblio References: 
Volume: 29 Issue: 29 Pages: 1701031
Advanced Materials