Abstract：
Fingerprints hold evidential value for individual identification; a sensitive, efficient, and convenient method for visualizing latent fingermarks (LFMs) is of great importance in the field of crime scene investigation. In this study, we proposed an aggregation-induced emission atomization technique (AIE-AT) to obtain high-quality fingermark images. Six volunteers made over 1566 fingerprint samples on 17 different objects. The quality of fingermark development was evaluated using grayscale analysis for quantitative assessment, combining the fluency of fingermark ridges and the degree of level 2 and level 3 features. Both qualitative and quantitative methods were employed to explore the effectiveness of AIE molecule C27H19N3SO in developing fingermarks, its applicability to objects, and its individual selectivity. Additionally, the stability of the AIE molecule was examined. Comparative experimental results demonstrated the high stability of the AIE molecule, making it suitable for long-term preservation. The grayscale ratio of the ridges and furrows was at least 2, with high brightness contrast, the level 2 and level 3 features were clearly observable. The AIE-AT proved to be effective for developing fingermarks on nonporous, porous, and semiporous objects. It exhibited low selectivity on suspects who leave fingermarks and showed better development effects on challenging objects, as well as efficient extraction capability for in situ fingermarks. In summary, AIE-AT can efficiently develop latent fingermarks on common objects and even challenging ones. It locates the latent fingermarks for further accurate extraction of touch exfoliated cells in situ, providing technical support for the visualization of fingermarks and the localization for extraction of touch DNA.
摘要：
指纹具有个人身份识别的证据价值；敏感的，高效,在犯罪现场调查领域中，用于可视化潜在指纹（LFM）的便捷方法非常重要。在这项研究中,我们提出了一种聚集诱导发射原子化技术（AIE-AT）来获得高质量的指纹图像。六名志愿者在17个不同的物体上制作了超过1566个指纹样本。使用灰度分析进行定量评估，对指纹开发的质量进行了评估，结合指纹脊的流畅性和2级和3级特征的程度。采用定性和定量两种方法来探索AIE分子C27H19N3SO在发展指纹中的有效性，它对物体的适用性，和它的个人选择性。此外,检查AIE分子的稳定性。比较实验结果证明了AIE分子的高稳定性，使其适合长期保存。脊和沟的灰度比至少为2，亮度对比高，2级和3级特征是可明显观察到的.AIE-AT被证明可以有效地在无孔上形成指纹，多孔，和半多孔物体。它对留下指纹的嫌疑人表现出低选择性，对挑战性物体表现出更好的发展效果，以及有效的原位指纹提取能力。总之,AIE-AT可以有效地在常见物体甚至具有挑战性的物体上开发潜在的指纹。它可以定位潜在的指纹，以便进一步准确提取原位触摸脱落细胞，为指纹的可视化和触摸DNA提取的定位提供技术支持。
