Latent fingerprint detection and identification using yellow-emitting YOF:Pr3+ nanophosphor

Q2 Engineering Optical Materials: X Pub Date : 2024-09-24 DOI:10.1016/j.omx.2024.100364

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Abstract

In this study, YOF:Pr³⁺ nanophosphors were synthesized using the microwave-assisted hydrothermal route. The structural and morphological properties of the nanophosphors calcined at different temperatures were studied in detail to optimize the synthesis conditions. The visible region and near-infrared (NIR) photoluminescence (PL) properties of the nanophosphors were obtained. Intense emission bands were observed in the blue and red regions under 250 nm excitation. The CIE chromaticity diagram showed that the color coordinates of the nanophosphors were located in the yellow region. The optimum Pr³⁺-concentration was found to be 0.002 mol fraction. The application of YOF: 0.002 Pr³⁺ nanophosphor for latent fingerprint detection was examined and evaluated on different types of surfaces. The nanophosphor demonstrated excellent adherence to the ridge patterns and sufficient sensitivity required for distinguishing between the ridges and the furrows. Different levels of detail were also observed that provided necessary information for the individualization of the fingerprints. The results suggest that the prepared YOF:Pr³⁺ nanophosphor can be a potential candidate for the rapid visualization and detection of latent fingerprints.

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使用黄色发光 YOF:Pr3+ 纳米荧光粉检测和识别潜伏指纹

本研究采用微波辅助水热法合成了 YOF:Pr3+ 纳米磷酸盐。为优化合成条件，详细研究了不同温度下煅烧的纳米磷酸盐的结构和形貌特性。获得了纳米磷的可见光区和近红外（NIR）光致发光（PL）特性。在 250 nm 的激发下，在蓝色和红色区域观察到了强烈的发射带。CIE 色度图显示，纳米磷的色坐标位于黄色区域。最佳的 Pr3+ 浓度为 0.002 摩尔分数。研究人员对 YOF: 0.002 Pr3+ 纳米荧光粉在不同类型表面的潜伏指纹检测中的应用进行了研究和评估。纳米荧光粉对脊纹图案的附着力极佳，并具有区分脊纹和沟纹所需的足够灵敏度。此外，还观察到不同程度的细节，这些细节为指纹的个性化提供了必要的信息。结果表明，制备的 YOF:Pr3+ 纳米荧光粉有可能成为快速显现和检测潜伏指纹的候选材料。

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