Vertically Aligned Ag Nanorod Arrays for Trace Cypermethrin Detection

Abstract:

According to the growing interest in development of high-sensitivity surface-enhanced Raman scattering (SERS) substrates, this study focused on the fabrication of silver nanorods (AgNRs) based on the DC magnetron sputtering, with the glancing-angle deposition (GLAD) technique. The influence of incident angles on the film morphologies and SERS activities of the deposited films were investigated by field-emission scanning electron microscopy (FE-SEM) and Raman spectroscopy. With methylene blue as the test agent, the vertical aligned silver nanorods proved highly potential in highly sensitive SERS detections. The pesticidal cypermethrin were also used as the probe molecules to investigate for future practical applications. This work showed that the increase in the incident angle during the deposition helped promote the porosity of the AgNRs. The SERS signals were significantly enhanced from the vertically aligned silver nanorods grown at 85o incident deposition angle and 20 rpm substrate rotational speed.

• Periodical: Advanced Materials Research (Volume 979)
• Pages: 259-262
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.979.259
• Online since: June 2014
• Authors: Puenisara Limnonthakul*, Saksorn Limwichean, Pitak Eiamchai, Mati Horprathum, Attawit Supati, Noppadon Nuntawong, Viyapol Patthanasetakul, Pongpan Chindaudom
• Keywords: Cypermethrin, Magnetron Sputtering, Silver Nanorod, Surface Enhanced Raman

References

[1] B. Liu, P. Zhou, X. Liu, X. Sun, H. Li, and M. Lin, Detection of Pesticides in Fruits by Surface-Enhanced Raman Spectroscopy Coupled with Gold Nanostructures, Food Bio. Tech. 6 (2013) 710–718.

DOI: 10.1007/s11947-011-0774-5

[2] M. Gamón, C. Lleó, A. Ten, and F. Mocholí, Multiresidue determination of pesticides in fruit and vegetables by gas chromatography/tandem mass spectrometry, J. AOAC Int. 84 (2001) 1209–1216.

DOI: 10.1093/jaoac/84.4.1209

[3] N. Nuntawong, M. Horprathum, P. Eiamchai, K. Wong-ek, V. Patthanasettakul, and P. Chindaudom, Surface-enhanced Raman scattering substrate of silver nanoparticles depositing on AAO template fabricated by magnetron sputtering, Vacuum. 84 (2010).

DOI: 10.1016/j.vacuum.2009.12.020

[4] R. Sancı and M. Volkan, Surface-enhanced Raman scattering (SERS) studies on silver nanorod substrates, Sensors Actuators B Chem. 139 (2009) 150–155.

DOI: 10.1016/j.snb.2008.10.033

[5] M. Horprathum, K. Limwichean, A. Wisitsoraat, P. Eiamchai, K. Aiempanakit, P. Limnonthakul, N. Nuntawong, V. Pattantsetakul, A. Tuantranont, and P. Chindaudom, NO2-sensing properties of WO3 nanorods prepared by glancing angle DC magnetron sputtering, Sensors Actuators B Chem. 176 (2013).

DOI: 10.1016/j.snb.2012.09.077

[6] X. Dong, H. Gu, J. Kang, X. Yuan, and J. Wu, Effects of the surface modification of silver nanoparticles on the surface-enhanced Raman spectroscopy of methylene blue for borohydride-reduced silver colloid, J. Mol. Struct. 984 (2010) 396–401.

DOI: 10.1016/j.molstruc.2010.10.014

[7] P. X. Zhang, X. Zhou, A. Y. S. Cheng, and Y. Fang, Raman Spectra from Pesticides on the Surface of Fruits, J. Phys. Conf. Ser. 28 (2006) 7.