Conjugated Polymers As Molecular Gates for Light-Controlled Release of Gold Nanoparticles
The remote release of nano-objects from a container is a promising approach to transduce chemical events into an optical signal. The major challenge in the development of such a system involves the use of a suitable molecular gate that retains aggregated particles and releases them upon applying an external stimulus. We show proof-of-concept experiments for the release of gold nanoparticles into an aqueous solution upon photodegradation of conjugated polymer thin films. Gold nanoparticles thus transduce light-induced chemical events into an amplified optical signal with a release rate of 2.5 nM per hour, which can be readily detected by the naked eye. ; This work was supported by the Spanish Ministerio de Economía y Competitividad (MAT2013-46101-R) and the Instituto de Salud Carlos III (Proyectos integrados de excelencia ref: PIE13/00048) and by the Department of Economic Development and Competitiveness of the Basque Government (ETORTEK IE13-374 Programme). We thank Dr. Javier Calvo for mass spectrometry support.