-A A +A
Photochromic systems can convert light energy into mechanical energy, thus they can be used as building blocks for the fabrication of prototypes of molecular devices that are based on the photomechanical effect. Hitherto a controlled photochromic switch on surfaces has been achieved either on isolated chromophores or within assemblies of randomly arranged molecules. Here we show by scanning tunneling microscopy imaging the photochemical switching of a new terminally thiolated azobiphenyl rigid rod molecule. Interestingly, the switching of entire molecular 2D crystalline domains is observed, which is ruled by the interactions between nearest neighbors. This observation of azobenzene-based systems displaying collective switching might be of interest for applications in high-density data storage.
National Academy of Sciences
Publication date: 
12 Jun 2007

Giuseppina Pace, Violetta Ferri, Christian Grave, Mark Elbing, Carsten von Hänisch, Michael Zharnikov, Marcel Mayor, Maria Anita Rampi, Paolo Samorì

Biblio References: 
Volume: 104 Issue: 24 Pages: 9937-9942
Proceedings of the National Academy of Sciences