Rechargeability of (a), ZnS:Cu,Al (b), ZnS: Mn (c), and CaTiO3:Pr (d) colloids. Each panel includes (i) temporal dynamics of luminescence intensity over 20 cycles of recharging and FUS-mediated emission; (ii) temporal dynamics of a representative cycle; and (iii) normalized peak intensity of ML emission as a function of cycle numbers.