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

One-dimensional Y 2 Ti 2 O 7 :Ho/Yb nanostructures , including nanowires, nanotubes , and wire-in-tube architectures, were fabricated via a simple electrospinning technique using a single-nozzle system. The diameters of Y 2 Ti 2 O 7 :Ho/Yb nanowires are between 180 and 200 nm. The Y 2 Ti 2 O 7 :Ho/Yb nanotubes have an outer diameter of 180 nm and a wall thickness of 30–40 nm. In the Y 2 Ti 2 O 7 :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 Y 2 Ti 2 O 7 :Ho/Yb nanostructure morphology. Further, the upconversion luminescence properties and temperature sensitivity of the one-dimensional Y 2 Ti 2 O 7 :Ho/Yb nanostructure were investigated compared with that of the Y 2 Ti 2 O 7 : Ho/Yb bulk prepared via solid-state reactions. Furthermore, to realize their dual-mode anticounterfeiting function, the Y 2 Ti 2 O 7 :Ho/Yb nanotubes were coated with a rare-earth nitrate (RE (NO 3 ) 3 ) using a homogeneous precipitation technique to obtain core-shell structure nanotubes of Y 2 Ti 2 O 7 :1 mol%Ho/20 mol%Yb @ Y 2 O 3 :10 mol%Eu.