A series of green emitting Gd₂O₃:Tb³⁺ (Tb: 0%–10% mol) nanoparticles (NP) were synthesized using the hydrothermal method, then characterized and evaluated for latent fingerprint visualization. X-ray diffraction study (XRD) revealed a cubic structure of the nanoparticles and the total incorporation of the terbium in the Gd₂O₃ matrix. Field Emission-Scanning Electron Microscopy (FESEM), Energy Dispersive x-ray Spectrometry (EDX) and Transmission Electron Microscopy (TEM) were used to study the morphology and the elementary composition of the NP. Photoluminescence (PL) studies showed strong green emission around 540 nm due to the transition ⁵D₄→⁷F₅. The luminescence color of the synthesized NP was characterized by the CIE 1931 chromaticity diagram. The potential use of the NP powders for the visualization of latent fingerprint under UV irradiation was assessed on various substrates. The latent fingerprint images revealed by the Gd₂O₃:Tb³⁺ NP powders are clear enough to extract and analyze reliable fingerprint features. The fingerprint quality was evaluated using three fingerprint quality assessment metrics and by extracting and measuring the visibility of the minutiae. The experimental results show very good quality images of the latent fingerprint acquired using the Gd₂O₃:Tb³⁺ NP and yield good minutiae extraction.

使用水热法合成了一系列发绿光的 Gd ₂ O ₃ :Tb ³⁺ (Tb: 0%–10% mol) 纳米粒子 (NP)，然后对其进行表征和评估以进行潜在指纹可视化。X 射线衍射研究 (XRD) 揭示了纳米颗粒的立方结构和铽在 Gd ₂ O ₃基质中的总结合。场发射扫描电子显微镜 (FESEM)、能量色散 X 射线光谱 (EDX) 和透射电子显微镜 (TEM) 用于研究 NP 的形态和基本组成。光致发光 (PL) 研究表明，由于跃迁⁵ D ₄ → ^7，在 540 nm 附近有强烈的绿色发射F ₅。合成的 NP 的发光颜色由 CIE 1931 色度图表征。在各种基材上评估了 NP 粉末在紫外线照射下潜在指纹可视化的潜在用途。Gd ₂ O ₃ :Tb ³⁺ NP 粉末显示的潜在指纹图像足够清晰，可以提取和分析可靠的指纹特征。使用三个指纹质量评估指标并通过提取和测量细节的可见性来评估指纹质量。实验结果表明，使用 Gd ₂ O ₃ :Tb ³⁺获得的潜在指纹图像质量非常好 NP 并产生良好的细节提取。