Morphological and Electrical Properties of gold nanoparticles /macroPorous Silicon for CO2 Gas

  • Alwan M. Alwan School of Applied Science, University of Technology, Baghdad,Iraq
  • Rasha B. Rashid School of Applied Science, University of Technology, Baghdad,Iraq
  • Amer B. Dheyab Ministry of Science and Technology, Baghdad, Iraq

Abstract

In this work, the fine structure macro-porous silicon (macroPS) substrate was prepared by photo-electro-chemical etching of n-type silicon wafer. Ultraviolet illumination condition of wavelength 360nm wavelength and intensity of about 100mW/cm2 with etching current density of about 50 mA/cm2 and etching time 5
min was employed. The Hybrid device gold nanoparticles /macroPorous Silicon (AuNPs/macroPS) was fabricated by deposition AuNPs into mPS substrate Via immersion plating process of macroPS in the solution of HAuCl4 with the (10-3M) concentration and 2min immersion time. The characteristics of PS before and after
immersion process were investigated by scanning electron microscopy (SEM), EDS, X-Ray diffraction (XRD), photoluminescence (PL) and Infrared spectroscopy (FTIR). The J-V characteristics of sandwich structure showed that the maximum sensitivity of the AuNPs/macro PS was about (90.5%)for compared with macro-PS substrate. The current-voltage characteristics were performed in primary vacuum with a base pressure of about 0.2mbar and CO2 with 1mbare concentrations.  Significant enhancement was observed in sensitivity of the AuNPs/macroPS hybrid device and temporal response after deposition the AuNPs.

Published
Jan 29, 2018
How to Cite
ALWAN, Alwan M.; RASHID, Rasha B.; DHEYAB, Amer B.. Morphological and Electrical Properties of gold nanoparticles /macroPorous Silicon for CO2 Gas. Iraqi Journal of Science, [S.l.], p. 57-66, jan. 2018. ISSN 2312-1637. Available at: <http://scbaghdad.edu.iq/eijs/index.php/eijs/article/view/77>. Date accessed: 15 nov. 2018.
Section
Physics