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Synthesis of Silver Nanodendrites on Silicon and Its Application for the Trace Detection of Pyridaben Pesticide Using Surface-Enhanced Raman Spectroscopy

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Abstract

We present the results of the synthesis of arrays of silver nanodendrites (AgNDs) on the surface of a silicon wafer (AgNDs@Si) and the application of them as surface-enhanced Raman scattering (SERS) substrates to detect traces of pesticides, through the example of pyridaben detection. AgNDs were chosen because they contain many of the points that could be considered as “hot spots”, and therefore SERS substrates made from them will have a high Raman enhancement factor. AgNDs were deposited onto the surface of silicon by electrochemical deposition, using an aqueous solution of HF and AgNO3. The results showed that, after fabrication, a large number of fern-like AgNDs formed on the surface of the silicon. These AgNDs are distributed evenly across the entire silicon surface with a relatively thick density. Pyridaben is a pesticide for the control of mites and some other insects such as white flies, aphids and thrips on fruits, vegetables, tea and ornamentals. Pyridaben is harmful to humans if it is used improperly. When used for the detection of pyridaben, SERS substrates made from fabricated AgNDs@Si were able to detect concentrations as low as 0.1 ppm.

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Acknowledgement

This work was supported financially by the Vietnam Academy of Science and Technology (VAST) under project VAST.DLT.04/17-18.

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Correspondence to Luong Truc Quynh Ngan.

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Ngan, L.T.Q., Minh, K.N., Cao, D.T. et al. Synthesis of Silver Nanodendrites on Silicon and Its Application for the Trace Detection of Pyridaben Pesticide Using Surface-Enhanced Raman Spectroscopy. J. Electron. Mater. 46, 3770–3775 (2017). https://doi.org/10.1007/s11664-017-5284-4

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  • DOI: https://doi.org/10.1007/s11664-017-5284-4

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