磁性纳米粉末在潜指印显现中的应用
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- 英文论文题名：Application of Au-Fe_3O_4 nanopowder for development of latent fingerprints on various surfaces
- 论文作者：喻彦林 ; 颜磊
- 英文论文作者：Yanlin Yu ; Lei Yan ; School of Criminal Investigation ; University of Political Science and Law
- 年：2016
- 作者机构：西南政法大学刑事侦查学院;
- 论文关键词：四氧化三铁 ; 纳米粉末 ; 磁性粉末 ; 潜指印显现
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十四分会：公共安全化学
- 语种：中文
- 分类号：TB383.1;D918.91
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十四分会 ; 公共安全化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：179k
- 原文格式：D
- 会议级别：全国
摘要
犯罪现场中不可见指印(潜指印)的显现是法庭科学最为重要的技术之一。由于传统的显现粉末颗粒较大而难以应用于粗糙表面上潜指印的显现。本研究参考文献~([1])并进行适当的优化,通过简单快捷的微波辅助合成法,以硫酸亚铁溶液为前驱体,加入少许氯金酸,在强碱性条件下成功制备了Au-Fe_3O_4 NPs。该纳米复合物具有较强的磁性,对外加磁场有快速的响应。制得的黑色粉末可用于多种客体物表面潜指印的显现中,尤其对部分粗糙表面潜指印的显现具有显著的优势。如图所示,在载玻片(光滑表面)上获得了清晰的纹线及细节特征,而在颗粒板(粗糙表面)上则由于较为粗糙产生了部分的背景着色,降低了显现的对比度,尽管如此,仍能辨认出其基本纹型及纹线的流向。该法合成步骤简单、操作简便、显现效果好,有望用于法庭科学领域潜指印显现的工作中。
Au-Fe_3O_4 nanoparticles have been synthesized by microwave irradiation. The prepared magnetic nanopowder have been formulated for developing latent fingermarks on various surfaces. By using powder technique, sharp and clear fingermarks with good contrast were obtianed. Especially for the rough surface, the small, fine nano-sized magnetic powder demonstrated great advantages. Due to simple operation, good stability, appropriate size and magnetism, this approach is expected to use in the forensic science area.
Au-Fe_3O_4 nanoparticles have been synthesized by microwave irradiation. The prepared magnetic nanopowder have been formulated for developing latent fingermarks on various surfaces. By using powder technique, sharp and clear fingermarks with good contrast were obtianed. Especially for the rough surface, the small, fine nano-sized magnetic powder demonstrated great advantages. Due to simple operation, good stability, appropriate size and magnetism, this approach is expected to use in the forensic science area.
引文
[1]Zheng,B.;Zhang,M.;Xiao,D.;Jin,Y.;Choi,M.M.F.Inorganic Materials,2010,46:1106-1111.