Surface-enhanced Raman scattering substrate of silver nanoparticles depositing on AAO template fabricated by magnetron sputtering

详细信息    查看全文

• 作者：Noppadon Nuntawong ; Mati Horprathum ; Pitak Eiamchai ; Krongkamol Wong-ek ; Viyapol Patthanasettakul ; Pongpan Chindaudom
• 关键词：Silver nanoparticles ; Raman scattering ; SERS ; Magnetron sputtering ; AAO ; Sensor
• 刊名：Vacuum
• 出版年：2010
• 出版时间：25 June 2010
• 年：2010
• 卷：84
• 期：12
• 页码：1415-1418
• 全文大小：585 K

文摘

In this report, we describe a fabrication process of low-cost and highly sensitive SERS substrates by using a simple anodizing setup and a low-energy magnetron sputtering method. The structure of the SERS substrates consists of silver nanoparticles deposited on a layer of anodic aluminum oxide (AAO) template. The fabricated SERS substrates are investigated by a scanning electron microscope (SEM), a transmission electron microscope (TEM), and a confocal Raman spectroscope. We have verified from the surface morphology that the fabricated SERS substrates consist of high-density round-shape silver nanoparticles where their size distribution ranges from 10 to 30 nm on the top and the bottom of nanopores. The surface-enhanced Raman scattering activities of these nanostructures are demonstrated using methylene blue (MB) as probing molecules. The detection limit of 10⁻⁸ M can be achieved from this SERS substrate.