Open Access Nano Express

Microfabrication and optical properties of highly ordered silver nanostructures

Hee-Ryoung Cha1, Jaeseon Lee1, Jae-Wook Lee1, Jong-Man Kim1, Jaebeom Lee1, Jihye Gwak2, Jae Ho Yun2, Yangdo Kim3 and Dongyun Lee1*

Author Affiliations

1 Department of Nano Fusion Technology, Pusan National University, Busan, 609-735, South Korea

2 Solar Cells Research Center, Korea Institute of Energy Research, Daejeon, 305-343, South Korea

3 School of Materials Science and Engineering, Pusan National University, Busan, 609-735, South Korea

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Nanoscale Research Letters 2012, 7:292  doi:10.1186/1556-276X-7-292

Published: 6 June 2012

Abstract

Using thermal evaporation, we fabricated five uniform and regular arrays of Ag nanostructures with different shapes that were based on an anodized aluminum oxide template and analyzed their optical properties. Round-top-shaped structures are obtained readily, whereas to obtain needle-on-round-top-shaped and needle-shaped structures, control of the directionality of evaporation, pore size, length, temperature of the substrate, etc., was required. We then observed optical sensitivity of the nanostructures by using surface-enhanced Raman scattering, and we preliminarily investigated the dependency of Raman signal to the roughness and shape of the nanostructures.

Keywords:
Physical vapor deposition; Raman spectroscopy; Nanostructured materials; Optical absorption; Surface-enhanced Raman scattering