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

Content Provider	Semantic Scholar
Author	Tang, Haibin Meng, Guowen Li, Zhongbo Zhu, Chuhong Huang, Zhulin Wang, Zhaoming Li, Fadi
Copyright Year	2015
Abstract	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 urchinlike 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.
Starting Page	2261
Ending Page	2270
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1007/s12274-015-0737-7
Volume Number	8
Alternate Webpage(s)	http://www.thenanoresearch.com/upload/justPDF/0737.pdf
Alternate Webpage(s)	https://doi.org/10.1007/s12274-015-0737-7
Journal	Nano Research
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article