Efficient in situ growth of platinum nanoclusters on the surface of Fe3O4 for the detection of latent fingermarks
Efficient in situ growth of platinum nanoclusters on the surface of Fe3O4 for the detection of latent fingermarks
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DOI：
10.1007/s10853-017-1475-x
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发表时间：
2017-12-01
影响因子：
4.5
通讯作者：
Liu, Rui
中科院分区：
文献类型：
--
作者：
Huang, Rui;Liu, Rui
采用聚乙烯亚胺（PEI）对疏水性Fe 3 O 4纳米粒子进行修饰，得到亲水性Fe 3 O 4纳米粒子。通过使用l-抗坏血酸（AA）作为还原剂降低H2 PtCl 6溶液的含量，将荧光铂纳米团簇（Pt NCs）孵育到PEI修饰的Fe 3 O 4纳米颗粒中。制备的Fe3O4@Pt纳米碳球粒径均匀，单分散性提高，具有较高的磁化强度（40.8emu/g）和荧光量子产率（9.0%）。与已有的方法相比，该方法在PEI-Fe_3 O_4表面制备Pt纳米粒子更方便，反应时间更短（约10 min）。实验结果表明，用Fe3O4@Pt纳米颗粒显影的潜在指纹具有优异的脊细节。Fe_3O_4@Pt纳米粒子具有超顺磁性和优异的荧光性能，在法医学领域具有巨大的应用潜力。
Hydrophobic Fe3O4 nanoparticles were modified with polyethyleneimine (PEI) to obtain hydrophilic Fe3O4 nanoparticles. By reducing the content of H2PtCl6 solution by using l-ascorbic acid (AA) as a reductive agent, fluorescent platinum nanoclusters (Pt NCs) were incubated into the PEI-modified Fe3O4 nanoparticles. The prepared Fe3O4@Pt NCs microspheres possessed a uniform size, improved monodispersity, high magnetization (40.8 emu/g) and high fluorescence quantum yield (9.0%). Moreover, compared to the reported methods, this method demonstrated that the incubation of Pt NCs on the surface of PEI-Fe3O4 was more convenient and needed less reaction time (about 10 min). The experimental results showed that latent fingermarks developing with Fe3O4@Pt NCs powder exhibit excellent ridge details. The Fe3O4@Pt NCs with superparamagnetism and excellent fluorescence showed great potential in forensic science.