针对深色、多色、复杂背景的客体,提取其表面上的潜在手印一直是侦破犯罪案件的疑难点,而通过使用具有光致发光性质的检验材料可以有效缓解客体背景干扰带来的问题。首先基于悬浮液技术的低毒害性、客体适应性广等特点,介绍了用荧光染色剂配制悬浮液显现手印的应用,然后依据荧光纳米颗粒出色的吸附性、荧光强度、可修饰特性,重点介绍用荧光染料包覆表面改性的纳米颗粒、量子点纳米颗粒、碳点纳米颗粒、稀土发光纳米颗粒配制成的悬浮液对不同种类、表面状态客体的显现效果与研究进展,并列举了可应用于未来微粒悬浮液技术的潜在纳米材料。最后基于目前荧光微粒悬浮液技术显现手印的现状提出展望。
For the dark-colored,multi-colored and complex background object,the extraction of latent handprints on its surface has always been a difficult point in the detection of crime cases,and through the use of inspection materials with photoluminescent properties,problems caused by the interference of the object background can be effectively alleviated.This paper firstly introduced the application of suspensions formulated with fluorescent dyes to reveal fingerprints based on the low toxicity and wide adaptability of objects of suspension technology,and then focused on the effect of suspensions formulated with fluorescent dye-coated surface-modified nanoparticles,quantum-dot nanoparticles,carbon dot nanoparticles,and rare-earth luminescent nanoparticles on different types and surface states of objects,based on the excellent adsorption,fluorescent intensity,and modifiability of the fluorescent nanoparticles.Different kinds of objects with different surface states were highlighted,and potential nanomaterials that could be applied to the future particle suspension technology were also listed.Finally,based on the current status of fluorescent particulate suspensions for the visualization of fingerprints,we proposed an outlook.
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