Rapid label-free SERS detection of foodborne pathogenic bacteria based on hafnium ditelluride-Au nanocomposites

作     者：Yang Li Yanxian Guo Binggang Ye Zhengfei Zhuang Peilin Lan Yue Zhang Huiqing Zhong Hao Liu Zhouyi Guo Zhiming Liu Yang Li;Yanxian Guo;Binggang Ye;Zhengfei Zhuang;Peilin Lan;Yue Zhang;Huiqing Zhong;Hao Liu;Zhouyi Guo;Zhiming Liu

作者机构：SATCM Third Grade Laboratory of Chinese Medicine and Photonics Technology&Guangdong Provincial Key Laboratory of Laser Life Science College of BiophotonicsSouth China Normal University GuangzhouGuangdong 510631P.R.China Healthy Medical Engineering Technology Research Center Guangdong Food and Drug Vocational College Guangzhou 510520P.R.China 

出 版 物：《Journal of Innovative Optical Health Sciences》 (创新光学健康科学杂志（英文）)

年 卷 期：2020年第3卷第5期

页      面：105-115页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(11874021,61675072 and 21505047) the Science and Technology Project of Guangdong Province of China(2017A020215059) the Science and Technology Project of Guangzhou City(201904010323 and 2019050001) the Innovation Project of Graduate School of South China Normal University School(2019LKXM023) the Natural Science Research Project of Guangdong Food and Drug Vocational College(2019ZR01) 

主　　题：Two-dimensional nanomaterials hafnium ditelluride surface-enhanced Raman scattering foodborne pathogenic bacteria 

摘      要：Two-dimensional(2D)nanomaterials have captured an increasing attention in biophotonics owing to their excellent optical ***,2D hafnium ditelluride(HfTe_(2)),a new member of transition metal tellurides,is exploited to support gold nanoparticles fabricating HfTe_(2)-Au *** nanohybrids can serve as novel 2D surface-enhanced Raman scattering(SERS)substrate for the label-free detection of analyte with high sensitivity and *** mechanism originated from HfTe_(2) nanosheets and the electromagnetic enhancement induced by the hot spots on the nano-hybrids may largely contribute to the superior SERS effect of HfTe_(2)-Au ***,HfTe_(2)-Au nanocomposites are utilized for the label-free SERS analysis of foodborne pathogenic bac-teria,which realize the rapid and ultrasensitive Raman test of Escherichia coli,Listeria mono-cytogenes,Staphylococcus aureus and Salmonella with the limit of detection of 10 CFU/mL and the maximum Raman enhancement factor up to 1.7×10^(8).Combined with principal component analysis,HfTe_(2)-Au-based SERS analysis also completes the bacterial classification without extra treatment.