无机可再生应力发光材料研究进展

Advances in Recoverable Mechanoluminescence in Inorganic Materials

应力发光是某些材料受到机械刺激时产生的发光现象。许多固体材料在压裂过程中会产生应力发光,但这种破坏性发光限制了材料的实际应用。可再生应力发光的发现为应力发光材料创造了解决现实问题的机会,其在结构健康诊断、力驱动的新型光源和显示器件以及生物力学应力传感器等领域展现出广泛的应用前景。本文对近二十年来无机可再生应力发光材料的研究进展进行了梳理和总结,主要介绍无机可再生应力发光材料的分类、表征、机理和应用四个方面,并讨论了未来研究中所面临的机遇和挑战,以期对该类材料的研发及应用提供有意义的启示。

Mechanoluminescence(ML)is generated during exposures of certain materials to mechanical stimuli.Many solid materials produce ML during their fracturing,however,the irreversibility of fracto-induced ML limits the practical applications of these materials.The discovery of recoverable mechanoluminescence(RML)creates opportunities for ML materials to solve practical problems,such as stress probes for structural health diagnosis,stress-driven advanced light sources and display devices,and biomechanical stress sensors.This review summarizes the research advances of inorganic RML materials in the past two decades.It focuses on the classification,characterization,mechanism and application of RML materials,and concludes with discussions on future directions of ML research and specific challenges to realize real-world applications,with a view to benefitting the development and application of such materials.