title: Highly Sensitive and Reproducible SERS Performance from Uniform Film Assembled by Magnetic Noble Metal Composite Microspheres.
abstract: To realize highly sensitive and reproducible SERS performance, a new route was put forward to construct uniform SERS film by using magnetic composite microspheres. In the experiment, monodisperse Fe3O4@SiO2@Ag microspheres with hierarchical surface were developed and used as building block of SERS substrate, which not only realized fast capturing analyte through dispersion and collection under external magnet but also could be built into uniform film through magnetically induced self-assembly. By using R6G as probe molecule, the as-obtained uniform film exhibited great improvement on SERS performance in both sensitivity and reproducibility when compared with nonuniform film, demonstrating the perfect integration of high sensitivity of hierarchal noble metal microspheres and high reproducibility of ordered microspheres array. Furthermore, the as-obtained product was used to detect pesticide thiram and also exhibited excellent SERS performance for trace detection.
authors.affiliation: Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China.
authors.forename: Chunyu
authors.initials: C
authors.lastname: Niu
authors.affiliation: Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China.
authors.forename: Bingfang
authors.initials: B
authors.lastname: Zou
authors.affiliation: Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China.
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China.
authors.forename: Lin
authors.initials: L
authors.lastname: Cheng
authors.affiliation: Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China.
authors.forename: Haihong
authors.initials: H
authors.lastname: Zheng
authors.affiliation: Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China.
authors.forename: Shaomin
authors.initials: S
authors.lastname: Zhou
mesh_terms: D052203:Ferrosoferric Oxide / Q000737:chemistry; D005659:Fungicides, Industrial / Q000032:analysis*; D006801:Humans; D059346:Magnets; D053768:Metal Nanoparticles / Q000737:chemistry*; D008863:Microspheres; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D012996:Solutions; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties; D013893:Thiram / Q000032:analysis*; D014867:Water / Q000737:chemistry
chemical_list: D005659:Fungicides, Industrial; D012996:Solutions; D014867:Water; D013893:Thiram; D012834:Silver; D012822:Silicon Dioxide; D052203:Ferrosoferric Oxide