Xiong Xiaobo, Yuan Ximing, Song Jiangqi, Yin Guoxiang
Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, China Hubei Key Laboratory of Forensic Science, Hubei University of Police, Wuhan, China.
Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, China
Appl Spectrosc. 2016 Jun;70(6):995-1000. doi: 10.1177/0003702816641266. Epub 2016 Apr 13.
Eu(2+), Dy(3+) co-doped strontium-magnesium silicate phosphors, Sr2MgSi2O7:Eu(2+), Dy(3+) (SMSEDs), have shown great potential in optoelectronic device due to their unique luminescent property. However, their potential applications in forensic science, latent fingermark detection in particular, are still being investigated. In this contribution, SMSEDs were successfully employed to latent fingermarks on a variety of non-porous and semi-porous surfaces, including aluminum foil, porcelain, glass, painted wood, colored paper, and leather. All the results illustrated that this luminescent powder, as a long-lasting phosphorescence material (LLP), was an ideal time-resolved detection reagent of fingermark for elimination of background interferences from various difficult substrates, and offered a good contrast to allow their identification without the need to enhance the results compared to nanosized organic fluorescent powder.
铕（Eu(2+)）、镝（Dy(3+)）共掺杂的硅酸锶镁磷光体，即Sr2MgSi2O7:Eu(2+), Dy(3+)（SMSEDs），因其独特的发光特性在光电器件中展现出巨大潜力。然而，它们在法医学中的潜在应用，尤其是潜在指纹检测，仍在研究之中。在本研究中，SMSEDs成功应用于多种无孔和半多孔表面上的潜在指纹，包括铝箔、瓷器、玻璃、油漆木、彩色纸和皮革。所有结果表明，这种发光粉末作为一种长效磷光材料（LLP），是一种理想的指纹时间分辨检测试剂，可消除来自各种复杂基质的背景干扰，并且与纳米级有机荧光粉相比，无需增强结果就能提供良好的对比度以便进行指纹识别。
