title: A three-dimensional silver nanoparticles decorated plasmonic paper strip for SERS detection of low-abundance molecules.
abstract: The fabrication of SERS substrates, which can offer the advantages of strong Raman signal enhancement with good reproducibility and low cost, is still a challenge for practical applications. In this work, a simple three-dimensional (3D) paper-based SERS substrate, which contains plasmonic silver-nanoparticles (AgNPs), has been developed by the silver mirror reaction. This paper strip was characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), etc. Pretreatment of the paper as well as the reaction time, temperature, and reagent concentrations for the silver mirror reaction were varied for further studies. With the optimized experimental parameters, the AgNPs synthesized and distributed in-situ on the paper strip could give more favorable SERS performance. The limit of detection (LOD) as low as 10(-11)M for Rhodamine 6G (R6G) and 10(-9)M for p-aminothiophenol (p-ATP) plus wide linear range for the log-log plot of Raman intensity versus analyte concentration were achieved. The detection of R6G in rain water was also carried out successfully. The merits of this protocol include low cost, easy operation, high sensitivity and acceptable stability, which make it ideal for the detection of environmental samples in trace amounts.
authors.affiliation: Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
authors.forename: Yixin
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
authors.affiliation: Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China. Electronic address: jiji@fudan.edu.cn.
authors.forename: Ji
authors.initials: J
authors.lastname: Ji
authors.affiliation: Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, Texas 78666, USA.
authors.forename: Chang
authors.initials: C
authors.lastname: Ji
authors.affiliation: Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China. Electronic address: bhliu@fudan.edu.cn.
authors.forename: Baohong
authors.initials: B
authors.lastname: Liu
mesh_terms: D000814:Aniline Compounds / Q000032:analysis; D002482:Cellulose / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D010209:Paper; D011891:Rain / Q000737:chemistry; D012235:Rhodamines / Q000032:analysis*; D012834:Silver / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013438:Sulfhydryl Compounds / Q000032:analysis; D014961:X-Ray Diffraction
chemical_list: D000814:Aniline Compounds; D012235:Rhodamines; D013438:Sulfhydryl Compounds; C026188:rhodamine 6G; D012834:Silver; C064316:4-aminothiophenol; D002482:Cellulose
keywords: AgNPs-arrayed paper strip; Cellulose; Low-abundance molecules; SERS; Silver mirror reaction