title: Time-Resolved Detection of Fingermarks on Non-Porous and Semi-Porous Substrates Using Sr2MgSi2O7:Eu2+, Dy3+ Phosphors.
abstract: 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.
authors.affiliation: 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.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Xiong
authors.affiliation: Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, China xiaobo997@163.com xmyuan@foxmail.com.
authors.forename: Ximing
authors.initials: X
authors.lastname: Yuan
authors.affiliation: Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, China.
authors.forename: Jiangqi
authors.initials: J
authors.lastname: Song
authors.affiliation: Hubei Key Laboratory of Forensic Science, Hubei University of Police, Wuhan, China.
authors.forename: Guoxiang
authors.initials: G
authors.lastname: Yin
mesh_terms: D003878:Dermatoglyphics; D004419:Dysprosium / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D044707:Forensic Sciences / Q000379:methods; D006801:Humans; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D017633:Magnesium Silicates / Q000737:chemistry*; D016062:Porosity; D011208:Powders; D013324:Strontium / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D049408:Luminescent Agents; D017633:Magnesium Silicates; D011208:Powders; D004419:Dysprosium; D005063:Europium; D013324:Strontium
keywords: Time-resolved detection; background interferences; contrast; latent fingermark; long-lasting phosphorescence