title: Au-coated ZnO nanorods on stainless steel fiber for self-cleaning solid phase microextraction-surface enhanced Raman spectroscopy.
abstract: Solid phase microextraction-surface enhanced Raman spectroscopy (SPME-SERS), combining the pretreatment and determination functions, has been successfully used in environmental analysis. In this work, Au-coated ZnO nanorods were fabricated on stainless steel fiber as a self-cleaning SERS-active SPME fiber. The ZnO nanorods grown on stainless steel fiber were prepared via a simple hydrothermal approach. Then the obtained nanostructures were decorated with Au nanoparticles through ion-sputtering at room temperature. The obtained SERS-active SPME fiber is a reproducible sensitivity sensor. Taking p-aminothiophenol as the probe molecule, the RSD value of the SERS-active SPME fiber was 8.9%, indicating the fiber owned good uniformity. The qualitative and quantitative detection of crystal violet and malachite green was also achieved. The log-log plot of SERS intensity to crystal violet and malachite green concentration showed a good linear relationship. Meanwhile, this SERS-active SPME fiber can achieve self-cleaning owning to the excellent photocatalytic performance of ZnO nanorods. Crystal violet was still successfully detected even after five cycles, which indicated the high reproducibility of this SERS-active SPME fiber.
authors.affiliation: Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan Shandong 250100, PR China.
authors.forename: Bo
authors.initials: B
authors.lastname: Li
authors.affiliation: Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan Shandong 250100, PR China.
authors.forename: Yu-E
authors.initials: YE
authors.lastname: Shi
authors.affiliation: Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan Shandong 250100, PR China.
authors.forename: Jingcheng
authors.initials: J
authors.lastname: Cui
authors.affiliation: Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan Shandong 250100, PR China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan Shandong 250100, PR China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan Shandong 250100, PR China. Electronic address: jhzhan@sdu.edu.cn.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Zhan
keywords: Nanomaterials; Self-cleaning; Solid-phase microextraction; Surface enhanced Raman spectroscopy; ZnO