Perovskite-based photoluminescent detection of lead particles in gunshot residue

IF 2.2 3区医学 Q1 MEDICINE, LEGAL

Forensic science international Pub Date : 2025-02-28 DOI:10.1016/j.forsciint.2025.112415

Kendra Adelberg , Arno van der Weijden , Lukas Helmbrecht , Diede Blaauw , Arian C. van Asten , Willem L. Noorduin

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引用次数: 0

Abstract

Gunshot residue (GSR) analysis is crucial for forensic investigations of shooting incidents, but current methods are time-consuming, laborious, and provide limited spatial resolution. We introduce photoluminescent lead analysis (PL-Pb) for instant high-resolution GSR detection. Lead particles in GSR react into lead halide perovskite semiconductors that emit bright green light under ultraviolet irradiation. PL-Pb enables trace detection of GSR, including ricochet markings, bullet wipes, and combustion plumes. Our method visualizes fine details like rifling patterns and facilitates and extends shooting distance reconstructions. We find that PL-Pb is also suitable for rapid presumptive testing of shooting suspect’s hands, clothes, shoes, and other relevant objects. The instant results, sensitivity, and spatial resolution of perovskite-based detection of lead-containing micro-traces offer unprecedented opportunities for forensic investigations and environmental studies on lead particles.

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基于钙钛矿的枪弹残余物铅粒子光致发光检测

射击残留物（GSR）分析对枪击事件的法医调查至关重要，但目前的方法耗时，费力，并且提供有限的空间分辨率。我们介绍了用于即时高分辨率GSR检测的光致发光铅分析（PL-Pb）。GSR中的铅粒子在紫外线照射下反应成卤化铅钙钛矿半导体，发出明亮的绿光。PL-Pb能够对GSR进行痕量检测，包括弹跳标记、子弹擦拭和燃烧羽流。我们的方法可视化精细的细节，如膛线图案，方便和扩展射击距离重建。我们发现PL-Pb也适用于射击嫌疑人的手、衣服、鞋子等相关物体的快速推定检验。钙钛矿检测含铅微量痕迹的即时结果、灵敏度和空间分辨率为铅颗粒的法医调查和环境研究提供了前所未有的机会。

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来源期刊

Forensic science international 医学-医学：法

CiteScore

5.00

自引率

9.10%

发文量

285

审稿时长

49 days

期刊介绍： Forensic Science International is the flagship journal in the prestigious Forensic Science International family, publishing the most innovative, cutting-edge, and influential contributions across the forensic sciences. Fields include: forensic pathology and histochemistry, chemistry, biochemistry and toxicology, biology, serology, odontology, psychiatry, anthropology, digital forensics, the physical sciences, firearms, and document examination, as well as investigations of value to public health in its broadest sense, and the important marginal area where science and medicine interact with the law. The journal publishes: Case Reports Commentaries Letters to the Editor Original Research Papers (Regular Papers) Rapid Communications Review Articles Technical Notes.