Fabrication of 3D-Hybrid Nanostructure for Surface-Enhanced Raman Scattering Substrate: Effect of Applied Voltage on Porous Size of AAO Template

Article Preview

Abstract:

Three-dimensional (3D)-hybrid surface-enhanced Raman scattering (SERS) substrates have been achieved via simultaneous assembled silver nanoparticles (AgNPs) onto the anodic aluminum oxide (AAO) templates. The AAO templates were prepared from the UHV aluminum foil in 0.3 M oxalic acid using the two-step anodization process at 0°C. The effect of applied voltage ranging from 30 to 50 V on the porous diameter and the inter-porous distance of the AAO templates was investigated and observed with filed-emission scanning electron microscope (FE-SEM). The results showed that the porous distance and the inter-porous distance were linearly increased with the increase in the voltage potentials. To investigate the pore-size effect on the SERS activities, the AgNPs were deposited on the AAO nanoporous templates. The SERS activities of these nanostructures were demonstrated with the methylene blue (MB) as the probing molecules.

You might also be interested in these eBooks

Info:

* - Corresponding Author

[1] K. Kneipp, H. Kneipp, J. Kneipp, Surface-enhanced Raman scattering in local optical fields of silver and gold nanoaggregates-From single-molecule raman spectroscopy to ultrasensitive probing in live cells, Acc. Chem. Res. 39 (2006) 443-450.

DOI: 10.1021/ar050107x

Google Scholar

[2] Noppadon Nuntawong, Mati Horprathum, Pitak Eiamchai, Krongkamol Wong-ek, Viyapol Patthanasettakul, Pongpan Chindaudom, Surface-enhanced Raman scattering substrate of silver nanoparticles depositing on AAO template fabricated by magnetron sputtering, Vacuum. 84 (2010).

DOI: 10.1016/j.vacuum.2009.12.020

Google Scholar

[3] W. J. Stępniowski, Z. Bojar, Synthesis of anodic aluminium oxide (AAO) at relatively high temperatures, Study of the influence of anodization conditions on the alumina structural features, Surface and Coatings technology. 206 (2011) 265-272.

DOI: 10.1016/j.surfcoat.2011.07.020

Google Scholar

[4] X. Dong, H. Gu, J. Kang, X. Yuan, J. Wu, Effect of the surface modification of silver nanoparticles on the surface-enhanced Raman spectroscopy of methylene blue for borohybride-reduced siliver colloid, Journal of molecular structure. 984 (2010).

DOI: 10.1016/j.molstruc.2010.10.014

Google Scholar