Silver nanoparticles deposited on anodic aluminum oxide template using magnetron sputtering for surface-enhanced Raman scattering substrate |
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| Authors: | Krongkamol Wong-ek Mati Horprathum Puenisara Limnonthakul Noppadon Nuntawong |
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| Affiliation: | a Nanoscience and Technology Program, Chulalongkorn University, Bangkok 10330, Thailandb National Electronics and Computer Technology Center, 112 Thailand Science Park, Phahonyothin Rd., Klong Luang, Pathumthani 12120, Thailandc Department of Physics, Faculty of Science, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand |
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| Abstract: | Low-cost and highly sensitive surface-enhanced Raman scattering (SERS) substrates have been fabricated by a simple anodizing process and a magnetron sputtering deposition. The substrates, which consist of silver nanoparticles embedded on anodic aluminum oxide (AAO) templates, are investigated by a scanning electron microscope and a confocal Raman spectroscopy. The SERS activities are demonstrated by Raman scattering from adsorbed solutions of methylene blue and pyridine on the SERS substrate surface. The most optimized SERS substrate contains the silver nanoparticles, with a size distribution of 10-30 nm, deposited on the AAO template. From a calculation, the SERS enhancement factor is as high as 8.5 × 107, which suggests strong potentials for direct applications in the chemical detection and analyses. |
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| Keywords: | Silver nanoparticles Raman scattering Surface enhanced raman scattering Magnetron sputtering Anodic aluminum oxide Scanning electron microscopy |
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