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Photocatalytically Powered Matchlike Nanomotor for Light‐Guided Active SERS Sensing
Author(s) -
Wang Yong,
Zhou Chao,
Wang Wei,
Xu Dandan,
Zeng Fanyu,
Zhan Chen,
Gu Jiahui,
Li Mingyu,
Zhao Weiwei,
Zhang Jiaheng,
Guo Jinhong,
Feng Huanhuan,
Ma Xing
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201807033
Subject(s) - raman spectroscopy , nanotechnology , materials science , surface enhanced raman spectroscopy , analyte , nanoscopic scale , optoelectronics , chemistry , raman scattering , optics , physics
Surface enhanced Raman spectroscopy (SERS) is a powerful optical sensing technique that can detect analytes of extremely low concentrations. However, the presence of enough SERS probes in the detection area and a close contact between analytes and SERS probes are critical for efficient acquisition of a SERS signal. Presented here is a light‐powered micro/nanomotor (MNM) that can serve as an active SERS probe. The matchlike AgNW@SiO 2 core–shell structure of the nanomotors work as SERS probes based on the shell‐isolated enhanced Raman mechanism. The AgCl tail serves as photocatalytic nanoengine, providing a self‐propulsion force by light‐induced self‐diffusiophoresis. The phototactic behavior was utilized to achieve enrichment of the nanomotor‐based SERS probes for on‐demand biochemical sensing. The results demonstrate the possibility of using photocatalytic nanomotors as active SERS probes for remote, light‐controlled, and smart biochemical sensing on the micro/nanoscale.