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The role of pulse time Toff on porous silicon as template for Au nanoparticles by using the integrated electrochemical technique |
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| Authors: | TST Amran MR Hashim NK Ali H Yazid R Adnan |
| Institution: | 1. Nano-optoelectronics Research Laboratory, School of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia;2. Material Innovations and Nanoelectronics Research Group, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia;3. School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia |
| Abstract: | Gold nanoparticles (AuNPs) having variety of sizes and shape were prepared using the template synthesis approach. Porous silicon (PSi) was fabricated using the pulsed electrochemical anodization method at different pause times, Toff as template for gold deposition. Choosing suitable pulse parameter produces PSi with higher porosity and smaller crystallite size. SEM showed that the variation of Toff affects the pores formation and the growth of gold nanoparticles while EDX suggested the presence of Au inside the pores structure. Photoluminescence spectra showed emission enhancement and a blue shifted relative to porous silicon before deposited with AuNPs. XRD shows a high degree crystallinity of the samples and the presence of cubic gold with crystalline sizes was around 42 nm. |
| Keywords: | Porous silicon Gold nanoparticles Pulsed electrochemical Photoluminescence |
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