期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 228, 期 -, 页码 31-35出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.01.018
关键词
SERS; Plasmonics; Nanosphere lithography
资金
- French Government
- ANR P2N [ANR-12-NANO-0016]
- French RENATECH network
We report on an improvement way of the SERS signal of Au triangular nanoprisms for a highly sensitive detection of chemical molecules. This improvement is obtained by a simple addition of a gold reflective layer under Au nanoprisms. Using the same Au triangular nanoprisms obtained by nanosphere lithography, we studied experimentally the thickness effect of this gold underlayer on the SERS intensity of the triangular nanoprisms. We demonstrated that this SERS intensity increased with the thickness of the gold reflective underlayer, and this is due to the increment of the Au underlayer reflectivity. Thus, we showed that the metallic reflective underlayer has an important key for SERS enhancement. Indeed, enhancement factors of 108 were found for the most important thickness of the gold underlayer. (C) 2016 Elsevier B.V. All rights reserved.
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