An emission based optical CO sensor fabricated on grating-like TiO substrates using HPTS.

TiO is a widely used material in various applications, including photo-catalysis, sensing, and dye-sensitized solar cells. In this work, we presented a stable and sensitive CO sensor working on principle of emission signals of the HPTS dye immobilized on TiO substrates whose effectiverefractive indicesin the parallel and perpendicular grating orientations evidenced earlier. The HPTS exhibited 8.