Nanowerk December 3, 2024
Although hybrid graphene-colloidal PbS quantum dots (QDs) phototransistors are promising to overcome the geometrical restrictions of photodetectors to flat substrates, the experimental demonstration of their application to curved surfaces remains elusive. Researchers in Switzerland demonstrated the seamless integration of an infrared photodetector to a polymer optical fiber (POF), by wrapping graphene around the POF of 1 mm in diameter and, inkjet printing of PbS QDs onto the curved surface. The device acted as a functional coating and detected infrared light propagating through the POF without interrupting the waveguide. The ink supported drop-on-demand, and was colloidally stable over 7 months. According to the researchers their work brings the integration of this cost-effective and adaptable hybrid detector approach closer to multifunctional e-textiles, and help to improve the interfacing of the skin as desired for wearable and non-invasive healthcare applications… read more. Open Access TECHNICAL ARTICLE
Printing resolution comparison between hexane and co-solvent approach… Credit: Advanced Materials Technologies, 05 February 2023