AniMOC · Directional Assembly of Emergent Luminescent and Anisotropic d10 Coinage Metal Organic Chalcogenolate Nanomaterials for Fabrication of Pressure Sensitive Devices

Directional Assembly of Emergent Luminescent and Anisotropic d10 Coinage Metal Organic Chalcogenolate Nanomaterials for Fabrication of Pressure Sensitive Devices

Touch is a sense that still remains difficult to mimic, as it requires the development of pressure sensors with high spatial resolution, high sensitivity and fast response time. To date, pressure sensitive devices utilise capacitive, piezo- or tribo-electric mechanisms, which do not allow direct visualisation of the touch/pressure. For spontaneous visual reading, light, associated to its palette of colors, is probably the best response to the variation of applied pressures. New light-emissive devices responsive upon touch or pressure will support growth for smart technologies such as e-skin, interactive clothing, robotics, touchpad screens, medical monitoring devices…etc. Today, there is thus a tremendous need of new optoelectronic devices for spontaneous and visual reading of the pressure through high-spatial resolution. The strategy of AniMOC project, to generate highly pressure sensitive materials, is to use luminescent and anisotropic nanomaterials, in order to apply a directional strain on the targeted bonds involved in the optoelectronic processes. In order to avoid platinum, iridium and lanthanide-based molecular compounds, that are considered as Critical Raw Materials (CRM) by the European Union, d10 coinage metals (Cu, Ag and Au) represent a good alternative, for their sustainability, affordability and their photoluminescence properties. More importantly, d10 coinage metals compounds can exhibit luminescence mechanochromism under soft pressure associated to a shift of the emission inducing different colours. This reversible pressure effect is due to the presence of weak metallophilic interactions that are involved in the luminescent mechanism and that are highly sensitive to structural changes upon mechanical strain. In this project a new family of highly stable, dense and anisotropic luminescent d10 coinage metal bridged by thiolate ligands, that are named Metal Organic Chalcogenolates (MOCs) coordination polymers (CPs). Thus, the objectives were (i) to obtain nanowires and nanosheets of the anisotropic MOCs, (ii) to control their external functionalization, (iii) to couple and organize them to generate aligned nanowires and packed nanosheets and (iv) to build strain sensitive emissive thin films with orientated MOCs. This project allows to discover three new families of MOC nanomaterials having different dimensionalities, different external functionalities, phase change abilities, and two methods of film formations were tested to get luminescent sensors.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз