Mechanosynthesis of optically stable fluorescent magnetic microparticles tailored for detection of latent fingerprints

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-05-02 DOI:10.1016/j.jphotochem.2025.116466

Hélio L. Barros , Emilia P.T. Leitão , Aladdin Mardanov , Ana I. Furtado , Vasco D.B. Bonifácio

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Abstract

Mechanosynthesis is a powerful methodology that combines simplicity, efficiency, and sustainability, thus enabling the production of novel advanced materials displaying superior features. Solid-state fluorescent magnetic microparticles (FMMPs) were designed for enhanced detection of latent fingerprints (LFPs) on multi-coloured, porous and non-porous surfaces. FMMPs were fabricated using a mechanically assisted process using different matrices, based on silica, trisodium citrate, and chitosan, to tailor sensitivity and specificity. The dual magnetic and fluorescent properties of FMMPs greatly impact their use in forensic applications, allowing the visualization of LFPs on diverse surfaces with high contrast, and avoiding dust scattering. Moreover, due to the magnetic properties, fingerprint non-adherent FMMPs can be easily recovered and reused. By optimizing FMMPs fabrication using a solvent-free mechanosynthesis, we successfully addressed one of the major challenges associated with FMMPs production, which is fluorescence quenching caused by Fe₃O₄. Furthermore, our studies revealed the effectiveness of FMMPs in detecting LFPs under extreme conditions, including high temperature (up to 150 °C), humidity (water immersion for 20 days), aging (1 to 45 days) and sequential deposition. Thus, due to their magnetic and fluorescent performance, excellent safety profile, biodegradable nature, cost-effectiveness and sustainable production, these FMPPs offer a significant advancement in fingerprint detection technology.

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用于潜在指纹检测的光学稳定荧光磁性微粒的机械合成

机械合成是一种强大的方法，它结合了简单、高效和可持续性，从而使新型先进材料的生产具有优越的特性。设计了固态荧光磁性微颗粒（FMMPs），用于在多色、多孔和非多孔表面增强潜在指纹（lfp）的检测。采用机械辅助工艺制备FMMPs，使用不同的基质，以二氧化硅、柠檬酸三钠和壳聚糖为基础，以调整灵敏度和特异性。FMMPs的双重磁性和荧光特性极大地影响了它们在法医应用中的应用，允许在高对比度的不同表面上可视化lfp，并避免灰尘散射。此外，由于磁性，指纹不粘附的FMMPs可以很容易地回收和重复使用。通过使用无溶剂机械合成优化FMMPs的制造，我们成功地解决了与FMMPs生产相关的主要挑战之一，即Fe3O4引起的荧光猝灭。此外，我们的研究揭示了FMMPs在极端条件下检测lfp的有效性，包括高温（高达150°C）、湿度（水浸泡20天）、老化（1至45天）和连续沉积。因此，由于其磁性和荧光性能，优异的安全性，可生物降解性，成本效益和可持续生产，这些fmpp在指纹检测技术方面取得了重大进展。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.