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巯基丁二酸修饰的碲化镉量子点溶液显现不同客体表面潜指纹

蔡铠阳1,杨瑞琴1*,王彦吉1,余雪娇2,刘建军2   

  1. (1.中国人民公安大学刑事科学技术系 北京 100038；2.北京化工大学理学院 北京 100029)
  • 收稿日期:2011-12-02 修回日期:2012-02-21 出版日期:2012-11-10 发布日期:2012-11-10
  • 通讯作者: 杨瑞琴，教授; Tel/Fax:010-83903363; E-mail:rqyang66@yahoo.com.cn; 研究方向：法庭科学
  • 基金资助:
    教育部新世纪优秀人才计划基金资助项目(NCET-10-0083)

Latent Fingermarks Development with Mercaptosuccinic Acid Modified CdTe QDs on Various Surfaces

CAI Kaiyang1, YANG Ruiqin1*, WANG Yanji1, YU Xuejiao2, LIU Jianjun2   

  1. (1.Department of Forensic Science,Chinese People′s Public Security University,Beijing 100038,China;
    2.College of Science,Beijing University of Chemical Technology,Beijing 100029,China)
  • Received:2011-12-02 Revised:2012-02-21 Published:2012-11-10 Online:2012-11-10

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摘要： 利用具有宽且连续的荧光激发光谱和窄且对称的荧光发射光谱的水溶性巯基丁二酸修饰的碲化镉量子点溶液，成功显现了多种客体表面的潜指纹，且1~3 s即可得到良好效果。 该材料成功显现了水浸客体和粘连客体表面的潜指纹，而且在显现连续按捺产生的微弱指纹时展现出了优良的灵敏度。 同龙胆紫、罗丹明6G和巯基乙酸修饰的CdTe量子点溶液相比，该溶液拥有更快的显现速度和更好的显现效果。

关键词: 巯基丁二酸, 碲化镉量子点溶液, 潜指纹

Abstract: Prominent fingermarks were obtained within 1~3 seconds after developed by the water-soluble mercaptosuccinic acid(MSA) modified CdTe quantum dots(QDs) with a wide-continuous excitation spectra and a narrow-symmetric emission spectra on various substrates. Latent fingermarks on water-immersed substrate and sticky adhesive tape were developed successfully. High sensitivity was also obtained on the development of latent fingermarks pressed continuously with the same finger. Compared with methyl violet, rhodamine 6G and mercaptoacetic acid(TGA) modified CdTe QDs, the MSA modified CdTe QDs showed the fastest developing speed and the best fingermarks quality.

Key words: MSA, CdTe QDs, latent fingermarks

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