Preparation of Novel Magnetic Nanomaterials Based on “Facile Coprecipitation” for Developing Latent Fingerprints (LFP) in Crime Scenes
Preparation of Novel Magnetic Nanomaterials Based on “Facile Coprecipitation” for Developing Latent Fingerprints (LFP) in Crime Scenes
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DOI：
10.1021/acsomega.1c04208
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发表时间：
2022
期刊：
影响因子：
4.1
通讯作者：
Binfang Yua
中科院分区：
文献类型：
--
作者：
Jingwei Wan;Lei Chen;Wei Li;Shengfeng Cui;Binfang Yua
: Recently, the application of novel nanomaterials, especially magnetic nanomaterials in the development of latent.fingerprints (LFP), has become the hot focus for forensic scientists and criminal investigators. As a type of recyclable, environmentfriendly material, Fe3O4 nanoparticles achieve a wonderful effect in visualization of LFP. We first report the synthesis and.encapsulation of nano-Fe3O4 through “facile coprecipitation”, (3-mercaptopropyl)triethoxysilane was covalently embedded into.Fe3O4 nanoparticles, and the Fe3O4 core was encapsulated by the nanosilver to prepare novel magnetic nanomaterials (P-MNP@Ag).with the core−shell configuration. For comparison, the magnetic nanomaterials (S-MNP@Ag) were prepared by surface.modification. Their composition, structure, and properties were characterized by SEM, TEM, XRD, IR, XPS, and VSM. Compared.with commercially available gold powder, silver powder, bare magnetic powder, and prepared S-MNP@Ag, the development effect of.LFP on different objects by using P-MNP@Ag had better performance, which presented the advantages of low background.interference, high sensitivity, and clear secondary details in LFP. In the crime scenes of some influential cases, P-MNP@Ag had been.applied to the visualization of LFP. The biometric identification of criminal suspects was confirmed through fingerprint comparison,.which was highly affirmed by the public security department.
