Luminescence properties, and anti-counterfeiting application of one-dimensional electrospun Y2Ti2O7:Ho/Yb nanostructures

One-dimensional Y2Ti2O7:Ho/Yb nanostructures, including nanowires, nanotubes, and wire-in-tube architec-tures, were fabricated via a simple electrospinning technique using a single-nozzle system. The diameters of Y2Ti2O7:Ho/Yb nanowires are between 180 and 200 nm. The Y2Ti(2)O(7):Ho/Yb nanotubes have an outer diameter of 180 nm and a wall thickness of 30-40 nm. In the Y2Ti2O7:Ho/Yb wire-in-tube architectures, the outer diameter of tubes, wall thickness of tubes, and diameter of wire are 180-190, 25-30, and 30-35 nm, respectively. The electrospinning process's environment humidity considerably influences the one-dimensional Y2Ti2O7:Ho/Yb nanostructure morphology. Further, the upconversion luminescence properties and temperature sensitivity of the one-dimensional Y2Ti2O7:Ho/Yb nanostructure were investigated compared with that of the Y2Ti2O7: Ho/Yb bulk prepared via solid-state reactions. Furthermore, to realize their dual-mode anticounterfeiting function, the Y2Ti2O7:Ho/Yb nanotubes were coated with a rare-earth nitrate (RE (NO3)(3)) using a homogeneous precipitation technique to obtain core-shell structure nanotubes of Y2Ti2O7:1 mol%Ho/20 mol%Yb @ Y2O3:(10) mol%Eu.