Ultrasound-Induced Mechanoluminescence and Optical Thermometry Toward Stimulus-Responsive Materials with Simultaneous Trigger Response and Read-Out Functions.

ABSTRACT: Ultrasound-induced mechanoluminescence (USML) of Erbium-doped CaZnOS is reported. Using the fluorescence intensity ratio of the ² H_11/2 , ⁴ S_3/2 → ⁴ I_15/2 transitions of Er³⁺ allows for simultaneous temperature mapping at an absolute sensitivity of 0.003 K^-1 in the physiological regime. The combination of USML, local heating, and remote read-out enables a feedback and response loop for highly controlled stimulation. It is found that ML is a result of direct energy transfer from the host material to Er³⁺ , giving room for adapted spectral characteristics through bandgap modulation. ML saturation at high acoustic power enables independent control of local light emission and ultrasonic heating.

SUBMITTER: Ding Y 

PROVIDER: S-EPMC9376836 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature