Abstract
The present paper discusses the creation of mud-like porous silicon structures (mud PSi) with various sizes; formed by laser–assisted etching pathway in Hydroxide potassium KOH solution. The influence of different laser power density (LPD) (from 250 to 400mW/cm2) was studied for mud-like structure as PSi substrates formation through employing short wavelength 405 nm laser diode. Morphological and optical features of the mud PSi dimensions and plasmonics Ag nanoparticles, surface and morphology of the formed layer were examined via the analysis field of emission scanning electron microscopy images, photoluminescence spectra, and (XRD) outcomes. The results showed fine-regulated mud PSi layers later adjusting the laser power density under the same KOH concentration and etching period. The mud PSi dimensions and density of mud regions within the created layer at 350 mW/cm2 laser power density exposed unique properties; due to the maximal heat accumulation process within the layer and non-limited possibility of dissolution the individual muds due to the localized hydrothermal etching process. The muds were used to create and adjust the plasmonic aspects of Ag nanoparticles. The sizes distributions of hotspot junctions and plasmonic Ag nanoparticles dimensions and their unique surface areas and showed fine adjusting structures later controlling the LPD.
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Acknowledgements
The authors would like to express their gratitude to the Department of Applied Sciences/University of Technology and Razi metallurgical research center, Iran, for using the SEM(MIRA3 TESCAN) and the EDS analyses.
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Shlaga, R.A., Alwan, A.M. & Mohammed, M.S. The role of laser irradiation in the modulation of an efficient mud-like structure as PSi layer for nanophotonic sensors. J Mater Sci: Mater Electron 34, 208 (2023). https://doi.org/10.1007/s10854-022-09579-7
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DOI: https://doi.org/10.1007/s10854-022-09579-7