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用于可视化检测潜在指纹的原始图形化碳氮量子点。

Pristine Graphic Carbon Nitride Quantum Dots for the Visualized Detection of Latent Fingerprints.

机构信息

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.

The Yangzhou Commission of Supervision, Yangzhou, 225000, China.

出版信息

Anal Sci. 2021 Nov 10;37(11):1497-1503. doi: 10.2116/analsci.20P336. Epub 2021 Apr 16.


DOI:10.2116/analsci.20P336
PMID:33867399
Abstract

User-friendly fingerprint powders, namely efficient, low-cost and nontoxic ones, are always desirable for the development of latent fingerprints (LFPs). Here, we described the use of pristine graphic carbon nitride quantum dots (g-CN QDs) as a new kind of user-friendly fingerprint powder. The g-CN QDs can be easily prepared from urea and sodium citrate precursors through low temperature solid-phase reaction. Due to their good optical properties and selective interactions with secretion residuals, the g-CN QDs powders were exploited to develop LFPs on different substrates by the powder dusting technique. The LFP images on a plastic bag exhibited a high ridge and furrow contrast ratio, allowing for easy identification of level 1 - 3 details of LFPs. This work indicates that the g-CN QD powders provide good performance for LFP visualization and is likely to be adopted for some applications in forensic investigations.

摘要

易于使用的指印粉末,即高效、低成本和无毒的指印粉末,一直是开发潜伏指印(LFPs)所需要的。在这里,我们描述了使用原始图形氮化碳量子点(g-CN QDs)作为一种新型的易于使用的指印粉末。g-CN QDs 可以很容易地从尿素和柠檬酸钠前体通过低温固相反应制备。由于其良好的光学性质和与分泌物残留物的选择性相互作用,g-CN QDs 粉末被用于通过粉末撒粉技术在不同的基质上开发 LFPs。在塑料袋上的 LFPs 图像具有较高的脊和皱纹对比度,允许轻松识别 LFPs 的 1 级-3 级细节。这项工作表明,g-CN QD 粉末为 LFPs 的可视化提供了良好的性能,并且可能被应用于法医调查中的一些应用。

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