TY - JOUR
T1 - Nanoplasmonic Au/Ag/Au nanorod arrays as SERS-active substrate for the detection of pesticides residue
AU - Sivashanmugan, Kundan
AU - Lee, Han
AU - Syu, Chiu Hua
AU - Liu, Bernard Hao Chih
AU - Liao, Jiunn Der
N1 - Funding Information:
This work was financially supported by the Ministry of Science and Technology of Taiwan under grant MOST 104-2221-E-006-160-MY3 and MOST 104-2811-E-066-077.
Publisher Copyright:
© 2017 Taiwan Institute of Chemical Engineers
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017/6
Y1 - 2017/6
N2 - Trace analysis of pesticides’ residue found in an agricultural product is a vital topic, which is still a time-consuming and unreliable approach. A fast and effective chemical sensing technique is therefore required. Surface-enhanced Raman spectroscopy (SERS) has been well developed for detecting target species at e.g., single molecule level. Herein, we used focus-ion beam and nano-indentation methods for fabricating Au/Ag/Au nanorods (NRs) and Au nanocavity array for subsequent SERS applications. The as-prepared SERS-active substrate was firstly evaluated by different wavelengths of Raman laser using rhodamine 6G as a probe molecule at low concentrations. The optimized Au/Ag/Au NRs array exhibited a strong SERS effect with an enhancement factor of 2.15 × 108. Furthermore, Au/Ag/Au NR substrates were competent to detect various types of pesticides' residue, i.e., permethrin, cypermethrin, carbaryl, and phosmet at low concentrations. Presumably high SERS signals may occur at the interface between pesticide molecules and NRs surface.
AB - Trace analysis of pesticides’ residue found in an agricultural product is a vital topic, which is still a time-consuming and unreliable approach. A fast and effective chemical sensing technique is therefore required. Surface-enhanced Raman spectroscopy (SERS) has been well developed for detecting target species at e.g., single molecule level. Herein, we used focus-ion beam and nano-indentation methods for fabricating Au/Ag/Au nanorods (NRs) and Au nanocavity array for subsequent SERS applications. The as-prepared SERS-active substrate was firstly evaluated by different wavelengths of Raman laser using rhodamine 6G as a probe molecule at low concentrations. The optimized Au/Ag/Au NRs array exhibited a strong SERS effect with an enhancement factor of 2.15 × 108. Furthermore, Au/Ag/Au NR substrates were competent to detect various types of pesticides' residue, i.e., permethrin, cypermethrin, carbaryl, and phosmet at low concentrations. Presumably high SERS signals may occur at the interface between pesticide molecules and NRs surface.
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U2 - 10.1016/j.jtice.2017.03.022
DO - 10.1016/j.jtice.2017.03.022
M3 - Article
AN - SCOPUS:85017359149
SN - 1876-1070
VL - 75
SP - 287
EP - 291
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
ER -