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. 2019 Mar 13;9(3):426. doi: 10.3390/nano9030426

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(A) SERS spectra obtained from different concentrations of paraoxon using self-assembly Au NPs arrays and blank substrate, the left of Figure 3A is the molecular structure of paraoxon; (B) the linear correlation of Raman intensity at 1327 cm⁻¹ with the logarithm of paraoxon concentration.