Development of dual-channel fluorescent mesoporous SiO 2 nanosphere-coated yttrium aluminum garnet composites for sensitive detection of latent fingerprints

作者：Ping Yang, Tingfei Shi, Shuangquan Zhu, Kuiliang Li, Hong Zhao · 发表于：RSC Advances · 年份：2024 · DOI：10.1039/d4ra00676c · 被引用次数：7 · 研究领域：Forensic Fingerprint Detection Methods、Biometric Identification and Security、Luminescence and Fluorescent Materials

electrostatic adsorption using the layer-by-layer method, demonstrating reversible switching between yellow and green light waves under 525 nm green light or 980 nm laser excitation. To evaluate the effectiveness of YAG-MSNs-RhD-6 powder in criminal investigations, we conducted simulations for different fingerprint scenarios. The results indicated that even after prolonged aging (up to 20 days), exposure to water, or high-temperature baking, the fingerprints remained clearly visible in the images. The detection of LFPs on various substrate surfaces exhibited high contrast, with the details of the fingerprints easily observable even after appropriate magnification. This study opens a new path for green light- and near-infrared light-induced up/down-conversion dual-channel composites for optical applications.