In-situ growth of gold nanoparticles on electrospun flexible multilayered PVDF nanofibers for SERS sensing of molecules and bacteria

作     者：Dongzhen Chen Liang Zhang Pan Ning Haozhi Yuan Yu Zhang Meng Zhang Tao Fu Xinhai He Dongzhen Chen;Liang Zhang;Pan Ning;Haozhi Yuan;Yu Zhang;Meng Zhang;Tao Fu;Xinhai He

作者机构：Key laboratory of functional textile sensing fiber and irregular shape weaving technologySchool of Materials Science&EngineeringXi’an Polytechnic UniversityXi’an710048China Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi’an Jiaotong UniversityXi’an710049China State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an710049China Non-equilibrium Condensed Matter and Quantum Engineering LaboratoryThe Key Laboratory of Ministry of EducationSchool of ScienceXi’an Jiaotong UniversityXi’an710049China Department of NeurologyThe First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an710061China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2021年第14卷第12期

页      面：4885-4893页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 070302[理学-分析化学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work is supported by the National Natural Science Foundation of China(No.81801122) Natural Science Basic Research Program of Shaanxi(No.2020JQ-529) Scientific Research Program Funded by Shaanxi Provincial Education Department(No.20JK0658) The industry-University-Research collaborative innovation project of Keqiao Textile Industry Innovation Institute of Xi’an Polytechnic University(No.19KQZD01) Xi’an Science and Technology Project(GXYD7.3) Key R&D projects of Shaanxi(No.2020GY-273) Project of China National Textile Industry Association(No.2020047) 

主　　题：electrospinning polyvinylidene fluoride(PVDF) in-situ growth of gold three-dimensional(3D)multilayered nanofibers flexible surface-enhanced Raman scattering(SERS)substrate bacteria sensing 

摘      要：Plasmonic surface of flexible multilayered nanofibers possesses special superiority for the surface-enhanced Raman scattering(SERS)sensing of molecules and microbial ***,the fabrication of flexible plasmonic nanofibers with high sensitivity and reproducibility is ***,we report a smart strategy for fabricating flexible plasmonic fibers,in which compact and homogeneous gold nanoparticles(Au NPs)are in-situ grown on the high-curvature surface of multilayered fibers of electrospun polyvinylidene fluoride(PVDF).Firstly,the surface of PVDF fibers is changed electrically,and Au seeds are deposited on the surface of PVDF fibers using electrostatic driving ***,a stable AuI_(4)−complex is formed employing coordination between I−and AuCl4−ions,which could decrease the reduction potential of AuCl4−and restrain the self-nucleation,and then the reduction reaction of AuI4−is initiated by introducing PVDF@Au seeds to pull down the barrier of potential ***,in-situ growth of AuNPs is generated on the high-curvature surface of PVDF nanofibers,and large-scale hotspots are generated by adjacent AuNPs coupling in the three-dimensional(3D)space of multilayered *** of PVDF@Au nanofibers also realizes the sensitive detection of thiram molecules(low limit of detection of 0.1 nM)and good reproducibility(relative standard deviation of 10.6%).Meanwhile,due to the multilayered construction of PVDF@Au nanofibers,a valid SERS signal on 3D surface of bacteria could be generated.3D distribution of hotspots on multilayered PVDF@Au nanofibers gives a clear advantage for SERS sensing of organic molecules and microbial cells.