Fig. 6: Preparation of rigid X-ray scintillator screen.

a Chemical structure of carboxymethylcellulose sodium (CMC-Na); b Tb3+-doped Na5Lu9F32 anchored halloysite nanotubes (HNTs@Na5Lu9F32:Tb3+); c HNTs@Na5Lu9F32:Tb3+-contained CMC-Na solution; d Glass plate (7.6 cm × 2.5 cm); e X-ray scintillator screen obtained by dropping HNTs@Na5Lu9F32:Tb3+-contained CMC-Na solution onto the glass plate and then dried at 105 °C.