Recent Progress of Advanced AIE Materials for Visualization of 3-Level Latent Fingerprints

The 3-level features of Latent fingerprints (LFPs) are pivotal in linking suspects with problematic or incomplete fingerprint data, constituting one of the most robust forms of evidence. Aggregation-induced emission (AIE) materials, known for their heightened emissive properties in high aggregation states, provide a robust and powerful approach for developing techniques for 3-level details of LFPs. So far, tremendous efforts have been devoted to solving high background fluorescence interference during the 3-level LFPs visualization process. This review commences with an overview of 3-level features and summarizes the interaction and mechanism of visualizing LFPs involving AIE materials and LFPs secretions. Moreover, it encompasses strategies to enhance the contrast and brightness of 3-level LFPs images. We highlight the mechanism of AIE′s physicochemical properties and their effects on the visualization of 3-level LFPs. Additionally, we provide insights into potential challenges and opportunities in this emerging field.