A Hierarchical Nanostructure‐Based Surface‐Enhanced Raman Scattering Sensor for Preconcentration and Detection of Antibiotic Pollutants. Issue 6 (20th April 2017)

• Record Type: Journal Article
• Authors: Zhou, Qitao; Meng, Guowen; Liu, Jing; Huang, Zhulin; Han, Fangming; Zhu, Chuhong; Kim, Dong‐Joo; Kim, Taesung; Wu, Nianqiang
• Is Part Of: Advanced materials technologies. Volume 2:Issue 6(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-04-20
• Subjects: antibiotic pollution -- nanostructures -- sensors -- surface‐enhanced Raman scattering; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.201700028
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract : A surface‐enhanced Raman scattering (SERS) sensor that integrates a plasmonic nanostructure with an electrostatic preconcentration unit has been developed. The silver nanoparticles (Ag‐NPs) grafted Ge nanowires (Ge‐NWs) are grown onto the surface of a commercial copper grid (Cu‐grid), which is usually used for transmission electron microscopy sample support. This leads to the formation of a hierarchical Ag‐NPs@Ge‐NWs@Cu‐grid substrate, which plays dual roles, i.e., preconcentration of analytes and amplification of SERS signal. This SERS detection platform based on the Ag‐NPs@Ge‐NWs@Cu‐grid substrate is able to selectively detect polar analytes such as antibiotic pollutants. This SERS sensor has achieved a limit of detection of 2.4 × 10 −9 m for 6‐aminopenicillanic acid and 0.9 × 10 −9 m for penicillin G, respectively. This work has demonstrated a promising SERS detection platform for monitoring polar SERS‐active pollutants in the aquatic environment. Abstract : Ag nanoparticles (Ag‐NPs) grafted Ge nanowires (Ge‐NWs) are grown onto the surface of a copper microgrid as a hierarchical surface‐enhanced Raman scattering (SERS) substrate. This Ag‐NPs@Ge‐NWs@Cu‐grid substrate plays dual roles, i.e., preconcentration of analytes and amplification of SERS signal. This unique design has significantly improved the sensitivity of SERS sensor by capture, preconcentration of polar analytes and plasmonic enhancement of sensing signal.