title: A facile strategy for obtaining fresh Ag as SERS active substrates.
abstract: A facile strategy has been reported to obtain on-line fresh Ag as surface-enhanced Raman scattering (SERS) active substrates by making AgCl nanoparticles exposed to the laser beam of Raman spectrometer. The composition and morphology of AgCl nanoparticles were characterized by X-ray diffraction (XRD), UV-visible (UV-vis) spectroscopy and scanning electron microscopy (SEM). The laser-driven evolvement and possible formation mechanism of cubic AgCl nanoparticles to Ag/AgCl composites were also investigated by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and high-resolution transmission electron microscopy (HRTEM). Raman measurements demonstrate that the fresh Ag nanoparticles with a few defects have a prominent SERS sensitivity to probe molecules, such as the 4-mercaptopyridine (4-Mpy) and 4-aminothiophenol (PATP) molecules. The SERS intensity of 4-Mpy and PATP increases up to the maximum when the laser irradiation time is prolonged to 50s, which corresponds to the defect extent and the proportion of fresh Ag in the Ag/AgCl composites. This work provides a simple, efficient and feasible approach for obtaining on-line fresh Ag as SERS substrates.
authors: Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, PR China; Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China.
authors: Zibao
authors: Z
authors: Gan
authors: Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, PR China; Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China. Electronic address: awzhao@iim.ac.cn.
authors: Aiwu
authors: A
authors: Zhao
authors: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China.
authors: Maofeng
authors: M
authors: Zhang
authors: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China.
authors: Dapeng
authors: D
authors: Wang
authors: Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, PR China; Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China.
authors: Wenyu
authors: W
authors: Tao
authors: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China.
authors: Hongyan
authors: H
authors: Guo
authors: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China.
authors: Da
authors: D
authors: Li
authors: Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, PR China; Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China.
authors: Ming
authors: M
authors: Li
authors: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei 230031, PR China.
authors: Qian
authors: Q
authors: Gao
mesh_terms: D000327:Adsorption; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D014961:X-Ray Diffraction
chemical_list: D012834:Silver