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A Hierarchical Nanostructure‐Based Surface‐Enhanced Raman Scattering Sensor for Preconcentration and Detection of Antibiotic Pollutants
Author(s) -
Zhou Qitao,
Meng Guowen,
Liu Jing,
Huang Zhulin,
Han Fangming,
Zhu Chuhong,
Kim DongJoo,
Kim Taesung,
Wu Nianqiang
Publication year - 2017
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201700028
Subject(s) - materials science , raman scattering , detection limit , nanostructure , substrate (aquarium) , nanoparticle , nanotechnology , nanowire , chemical engineering , raman spectroscopy , chromatography , chemistry , optics , physics , oceanography , engineering , geology
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.