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


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.

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.

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