发射红色固态荧光的铕掺杂碳点对潜在指纹的检测  

Red-Emissive Eu-Doped Carbon Nanodots in Solid-State for Latent Fingerprint Detection

作　　者：丁保宏 葛浩宇 李国瑞 李大武[2] 尤楠 Ding Baohong;Ge Haoyu;Li Guorui;Li Dawu;You Nan(College of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China;College of Forensic Science,Criminal Investigation Police University of China,Shenyang 110035,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]中国刑事警察学院刑事科学技术学院,辽宁沈阳110035

出　　处：《中国稀土学报》2025年第1期69-75,共7页Journal of the Chinese Society of Rare Earths

基　　金：公安部科技强警基础工作专项(2021JC07);痕迹检验鉴定技术公安部重点实验室(中国刑事警察学院)(HJ2023401K)资助。

摘　　要：采用水热法,以柠檬酸为碳源,以半胱氨酸为氮源和硫源,通过掺杂Eu元素,制得了发射明亮红色固态荧光的纳米碳点(Eu-CDs)。合成的类球形Eu-CDs粒径为2~5 nm,紫外254 nm激发下,荧光发射光谱显示在617 nm处呈现出宽的发射峰,将Eu-CDs应用于潜在指纹(LFPs)粉末显现法检测中,表现出良好的灵敏度、适应性和可靠性。合成的Eu-CDs粉末颗粒不仅能够清晰地显示出不同基材表面上LFPs的清晰图案和特征细节,对于老化LFPs的检测也表现良好。结果表明,Eu-CDs可作为一种具有良好潜能的荧光粉可用于刑侦的LFPs检测和个体识别。Using citric acid as the carbon source and cysteine as the nitrogen and sulfur sources, the bright red-emissive carbon nanodots in solid-state wereobtained by doping Eu element viahydrothermal method(Eu-CDs).Eu-CDs exhibit the near-spherical shape with the particle size ranged from 2 to 5 nm, and a wide emission peak at 617 nm under 254 nm light excitation. Most importantly, Eu-CDs exhibit good sensitivity, adaptability, and reliability in the process of the LFPs detection using the method of powder dusting. The patterns and feature details of the LFPs on the surfaces of different substrate can be clearly displayed, while, there are no significantly interferences of the reflection of smooth surfaces, rough surfaces, multicolor and self-fluorescent backgrounds on the LFPs detection based on the Eu-CDs. The detection of aging LFPs using the Eu-CDs is also satisfactory. These results suggest that the Eu-CDs have great potential as a promising fluorescent labeling agent for the visualization of LFPs and can be used for the LFPs detection and individual identification in criminal investigation.

关 键 词：光致发光 碳点 掺杂 潜在指纹 稀土 

分 类 号：O647.3[理学—物理化学]