title: Silver nanoparticles decorated filter paper via self-sacrificing reduction for membrane extraction surface-enhanced Raman spectroscopy detection.
abstract: Silver nanoparticles (AgNPs) decorated filter papers combining solid-phase extraction (SPE) with surface enhanced Raman spectroscopy (SERS) achieved rapid collection of analytes and in situ detection. The AgNPs were fabricated by cellulose self-sacrificing reduction. Aqueous Ag(NH3)2OH was reduced by hydroxyl groups in cellulose under alkaline conditions. The AgNPs were highly uniform and firmly adhered to the microfibers. Reaction conditions were optimized by the probe molecule p-aminothiophenol (PATP) to attain the best Raman enhancement. Methylene blue trihydrate (MB) and 6-thioguanine (6-TG) were detected by flow-through method. The results exhibited outstanding SERS effect and an obvious improvement in detection limit was observed compared to common immersion methods. SERS detection was quantitative as the log-log plot of Raman intensity against MB and 6-TG concentrations showed a linear relationship. The SERS-active paper is degradable because it could be burned after analyte detection.
authors: Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan, Shandong 250100, PR China.
authors: Yanjing
authors: Y
authors: Meng
authors: Yongchao
authors: Y
authors: Lai
authors: Xiaohong
authors: X
authors: Jiang
authors: Quanqin
authors: Q
authors: Zhao
authors: Jinhua
authors: J
authors: Zhan
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry; D005374:Filtration; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry*; D008751:Methylene Blue / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D010209:Paper; D012834:Silver / Q000737:chemistry*; D052616:Solid Phase Extraction; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013438:Sulfhydryl Compounds; D013866:Thioguanine / Q000032:analysis*
chemical_list: D000814:Aniline Compounds; D013438:Sulfhydryl Compounds; D012834:Silver; C064316:4-aminothiophenol; D002482:Cellulose; D013866:Thioguanine; D008751:Methylene Blue