The Effects of Psi Morphology on the Detection Efficiency of the Au-Nps Hot Spot SERS Sensors

  • Mohammed J. Mahmood Directorate medical services, Agency of ministry for administration affairs, Ministry of interior, Baghdad, Iraq
  • Alwan M. Alwan Department of Applied Sciences, University of Technology, Baghdad, Iraq
Keywords: SERS, Plasmonics Au-NPs, Hot spot gaps, Porous silicon morphology, Amoxicillin

Abstract

This work is related to the investigation of the effects of porous silicon (PSi) morphologies on the performance of plasmonic gold nanoparticles (Au-NPs) hot spot SERS sensors for the detection of amoxicillin molecules. Two Si wafers with different resistivity values of 10 and 100 Ω.cm were used to synthesize a PSi layer of pores- and mud-like structures, respectively, by pulsed photo chemical etching process. The hot spot SERS sensors were synthesized by incorporating the Au-NPs within the PSi morphologies of pores- and mud- like structures which are characterized by high density of nucleation sites. Plasmonic Au- NPs with different sizes and hot spot regions were incorporated into the porous structures by the ion reduction process. It was recognized that the PSi morphologies have a considerable influence on the fabrication process of the detection sensors and, consequently, on the detection process. The plasmonic Au-NPs hot spot SERS sensor based on the PSi morphology of the mud-like structures shows higher sensitivity than that of pores-like structures, even at very low concentrations of amoxicillin solutions.

Published
2021-01-30
How to Cite
MahmoodM. J., & AlwanA. M. (2021). The Effects of Psi Morphology on the Detection Efficiency of the Au-Nps Hot Spot SERS Sensors. Iraqi Journal of Science, 62(1), 157-166. https://doi.org/10.24996/ijs.2021.62.1.15
Section
Physics

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