Multiphysics characterization of light intensity and wavelength of mechanoluminescent ZnS:Cu-PDMS micro-composites

In this study, we aim to characterize the mechano-luminescent (ML) light emission of the copper-doped zinc sulfide (ZnS:Cu)-embedded polydimethylsiloxane (PDMS) (ZnS:Cu-PDMS) micro-composites. First, the seven different ZnS:Cu-PDMS micro-composites were fabricated by using three different types of ZnS:Cu that emits blue, green, and orange light by blending those different colored ZnS:Cu. The micro-composites were prepared through the mold-casting method. Second, the ML test specimens will be subjected to uniaxial tensile loading/unloading cycles with various loading patterns. The ML light emissions were recorded by a high-speed color camera, and the video footages were image-processed to catalogue ML light intensity and color. Lastly, the spectroradiometer was employed for acquiring the light radiance spectrums from the prepared ZnS:Cu-PDMS micro-composites.