Zhao Dan, Ma Wenting, Xiao Xincai
School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China.
National Demonstration Center for Experimental Ethnopharmacology Education (South-Central University for Nationalities), Wuhan 430074, China.
Nanomaterials (Basel). 2018 Aug 12;8(8):612. doi: 10.3390/nano8080612.
The recognition of fingerprints has played an extremely important role in criminal investigations, due to its uniqueness. This paper reports on the recognition of sweat latent fingerprints using green-emitting, environment-friendly carbon dots prepared with DL-malic acid and ethylenediamine, and the exploration of impacting factors in the development process of fingerprints. The experiments showed that better fingerprint images could be obtained when the latent fingerprints are developed in green-emitting carbon dots with pH 9 for 30 min, at room temperature. The reported method was also effective for latent fingerprints on a variety of substrates, as well as for those water-immersed ones, where the developed fingerprint remained stable after long-term preservation. Furthermore, the fluorescent three-dimensional fingerprint image could provide direct and simple evidence on pressing habits. The objective of this paper was to present this method. The method may help to narrow the range of suspects during criminal investigations and in forensic science.
由于指纹的独特性，指纹识别在刑事调查中发挥了极其重要的作用。本文报道了利用由DL-苹果酸和乙二胺制备的绿色发光、环境友好型碳点对汗液潜指纹进行识别，并对指纹显影过程中的影响因素进行了探索。实验表明，在室温下，将潜指纹置于pH值为9的绿色发光碳点中显影30分钟时，可获得更好的指纹图像。所报道的方法对各种基材上的潜指纹以及水浸潜指纹均有效，显影后的指纹在长期保存后仍保持稳定。此外，荧光三维指纹图像可为按压习惯提供直接且简单的证据。本文的目的是介绍这种方法。该方法可能有助于在刑事调查和法医学中缩小嫌疑人范围。
