Our recent publication in Material Horizons journal entitled “Thermoresponsive Multicolor-Emissive Materials Based on Solid Lipid Nanoparticles” has been highlighted in the main cover of the current issue of Material Horizons . The paper, authored by Jaume Ramon Otaegui and led by Dr. Claudio Roscini and Dr. Jordi Hernando (UAB), reported the formation of novel thermoresponsive multicolored fluorescent nanomaterials suitable for the preparation of thermofluorochromic transparent polymeric films and printable waterbased inks.
With this novel work, the authors demonstrated for the first time this PCM-based thermally-induced optical modulation is transferred to the nanoscale through the preparation of dye-loaded solid-lipid-nanoparticles (SLPs). These allow obtaining thermofluorochromic highly transparent nanocomposites and water-based inks, impossible to achieve with bulk PCM mixtures.
By using one single dye and combining different SLPs made of PCMs of distinct melting point, multistate- and multicolor fluorescent thermoresponsive materials are prepared in a peerless simple fashion. Furthermore, by adding a second dye, thermofluorescent films displaying most of the colors of the CIE 1931 color space are obtained, including nearly pure emitted white light. Finally, SLPs have been easily integrated with NIR-absorbing plasmonic nanoparticles to produce photothermallyresponsive multicolor fluorescent materials, of interest for multithreshold temperature sensing and anticounterfeiting. Overall, the developed approach grants access to new temperature-responsive emissive nanomaterials, with straightforward, tunable and fine control of the optical properties in the solid state that are hard to achieve otherwise.