Portable hydrogel-based tri-channel fluorescence sensor array for visual detection of multiple explosives  

作　　者：Wenxing Gao Wenfeng Liu Saijin Huang Lin Wang Yingying Jian Yutong Li Weiwei Wu Li Shang 

机构地区：[1]State Key Laboratory of Solidification Processing,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China [2]School of Advanced Materials and Nanotechnology,Xidian University,Xi'an 710126,China [3]Honors College,Northwestern Polytechnical University,Xi'an 710119,China

出　　处：《Nano Research》2024年第7期6483-6492,共10页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21705129 and 22274131);Shaanxi Fundamental Science Research Project for Chemistry&Biology(No.22JHQ071).

摘　　要：The identification and detection of various types of explosives are essential for human health and environmental monitoring.Array-based sensing approach offers significant advantages in detecting multi-analytes simultaneously,thereby holding great potential in identifying multiple explosives.Here,we report a tri-channel fluorescence array composed of three distinct fluorescence probes based on gold nanoclusters and nicotinamide adenine dinucleotide with well-separated emission colors.Through the specific interactions of explosives with different fluorescent probes and the yielded response patterns,seven explosives can be successfully distinguished with 100%accuracy.In particular,the sensor array exhibits excellent performance in the quantitative analysis of individual explosive and the differentiation of multiple explosive mixtures.To facilitate the field detection towards practical application,the tri-channel fluorescence array was further integrated with polymer hydrogels.The fabricated portable hydrogel-based array sensors can not only visually identify seven different explosives by their distinct fluorescence color change,but also enable quantitative detection based on linear discriminant analysis(LDA)together with a smartphone.This study illustrates the great potential of hydrogel-based fluorescence sensor array as robust sensors for explosives,which also holds significant promise for the development of portable explosive devices towards practical application.

关 键 词：sensor array gold nanoclusters explosives FLUORESCENCE HYDROGELS 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]