Light Delivery, Acoustic Read‐Out, and Optical Thermometry Using Ultrasound‐Induced Mechanoluminescence and the Near‐Infrared Persistent Luminescence of CaZnOS:Nd³⁺

Abstract

Light emission from CaZnOS:Nd3+ by high‐intensity ultrasound excitation is demonstrated. Acoustic power and duty ratio enable simultaneous control of the degree of (local) thermo‐acoustic heating in isothermal or nonisothermal conditions. The Nd‐related photoemission provides direct thermometric feedback at an absolute sensitivity on the order of 10−4 K−1, within the physiological temperature range. From the individual temperature dependence of persistent luminescence and mechanoluminescence, both effects are attributed to a heterologous de‐trapping mechanism. In addition to acoustic heating and optical thermometry, this enables optical information storage and smart labeling with optoacoustic read‐out.

Multifunctional Optical Sensing with Lanthanide-Doped Upconverting Nanomaterials: Improving Detection Performance of Temperature and Pressure in the Visible and NIR Ranges

“…The performance of the thermometers can be quantified using absolute and relative thermal sensitivity. Absolute thermal sensitivity demonstrates the absolute change in the LIR with temperature change and is defined as follows: , S a = ∂ LIR ∂ T …”

Mechanoluminescence and Photoluminescence Heterojunction for Superior Multimode Sensing Platform of Friction, Force, Pressure, and Temperature in Fibers and 3D‐Printed Polymers

“…Nowadays, ML-based sensing materials are widely applied in structural health diagnosis, [19,20] artificial skin, [21,22] flexible electronic devices, [7,23] robotics, [24,25] etc. [26][27][28][29][30] Thermo-and pressure-sensitive phosphors doped with lanthanides or transition ions provide quick, contactless, and highsensitivity readouts of the temperature and/or pressure with (sub-)micrometer-sized resolution, outperforming conventional techniques. [31][32][33][34][35] However, vital challenges remain, for example, improving sensitivity for temperature or pressure, achieving a visual sensing approach, and widening the temperature or pressure sensing range.…”

“…Nowadays, ML‐based sensing materials are widely applied in structural health diagnosis, [ 19,20 ] artificial skin, [ 21,22 ] flexible electronic devices, [ 7,23 ] robotics, [ 24,25 ] etc. [ 26–30 ]…”

Application convenient and energy-saving mechano-optics of Er3+-doped X2O2S (X = Y/Lu/Gd) for thermometry

“…Upon external mechanical stimuli, for instance, extruding, bending, stretching, and pressing, mechanoluminescent materials are able to emit luminescence. 1–12 This means that some mechanical actions that are thriftless in our daily life or even in industry production can be collected and recycled in the form of light. This is awfully fascinating, especially considering that we are now facing a new round of grievous energy crisis.…”