Hexagonally arranged arrays of urchin-like Ag hemispheres decorated with Ag nanoparticles for surface-enhanced Raman scattering substrates  

作　　者：Haibin Tang Guowen Meng Zhongbo Li Chuhong Zhu Zhulin Huang Zhaoming Wang Fadi Li 

机构地区：[1]Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei 230031, China [2]University of Science and Technology of China, Hefei 230026, China

出　　处：《Nano Research》2015年第7期2261-2270,共10页纳米研究（英文版）

基　　金：This work was financially supported by the National Basic Research Program of China （No. 2013CB934304）, the CAS/SAFEA International Partnership Program for Creative Research Teams, the National NaturalScience Foundation of China （Nos. 21303211, 11274312 and 51472245）.

摘　　要：The surface topography of noble metal particles is a significant factor in tailoring surface-enhanced Raman scattering （SERS） properties. Here, we present a simple fabrication route to hexagonally arranged arrays of surface-roughened urchin- like Ag hemispheres （Ag-HSs） decorated with Ag nanoparticles （Ag-NPs） for highly active and reproducible SERS substrates. The urchin-like Ag-HS arrays are achieved by sputtering Ag onto the top surface of a highly ordered porous anodic aluminum oxide （AAO） template to form ordered arrays of smooth Ag-HSs and then by electrodepositing Ag-NPs onto the surface of each Ag-HS. Owing to the ordered arrangement of the Ag-HSs and the improved surface roughness, the urchin-like hierarchical Ag-HS arrays can provide sufficient and uniform ＂hot spots＂ for reproducible and highly active SERS effects. Using the urchin-like Ag-HS arrays as SERS substrates, 10-7 M dibutyl phthalate （a member of plasticizers family） and 1.5 × 10-5 M PCB-77 （one congener of polychlorinated biphenyl, a notorious class of pollutants） are identified, showing promising potential for these substrates in the rapid recognition of organic pollutants.

关 键 词：Ag-hemisphere urchin-like surface roughness POLYCHLORINATED BIPHENYLS (pcbs) surface-enhanced RAMAN scatteringsurface-enhanced RAMAN sers 

分 类 号：O[理学]