Aspect ratio-dependent optical properties of Ni–P/AAO nano-array composite structure
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Using electrochemical deposition, Ni–P nanorod arrays with a series of aspect ratios have been successfully fabricated in the pores of anodic aluminum oxide (AAO) membranes. The aspect ratio of Ni–P nanorods was controlled by the deposition time. The morphologies were analyzed by scanning electron microscopy and transmission electron microscopy. The dependence of the optical absorbance upon the aspect ratio was studied by UV–vis spectra. The results show that the absorbance increases in visible region and decreases rapidly in ultraviolet region as the aspect ratio of nanorods increases, which qualitatively agree with the prediction of Maxwell–Garnett (MG) theory and the simulation based on the Mie scattering theory, respectively. The dependence of photoluminescence emission (PL) spectra upon the aspect ratio is also obtained. These investigations show that the optical properties of nano-array composite structure can be modified by changing the aspect ratio of nanorods.
KeywordsAspect Ratio Composite Structure Anodic Aluminum Oxide Optical Absorbance Nanorod Array
This work was supported by FANEDD of China No. 200525, Natural Science Foundation of Hubei Province No.2005ABA027 and Science & Technology Program of Wuhan City No.200970634268.
- 13.Foss CA Jr, Hornyak GL, Stockert JA, Martin CR (1993) In: Proceedings of materials research society symposium on nanometals, vol 286. Boston, MA, p 431Google Scholar
- 16.Brenner A, Riddell GE (1946) J Res Natl Bur Stand 37:31Google Scholar
- 18.Feldheim DL, Foss CA Jr (2002) Metal nanoparticles: synthesis, characterization and application. Marcel Dekker, New YorkGoogle Scholar
- 26.Zong RL, Zhou J, Li B, Fu M, Shi SK, Li LT (2005) J Chem Phys 123:094710-1-094710-5Google Scholar
- 32.Van de Huist HC (1981) Light scatting by small particles. Dover, New YorkGoogle Scholar
- 35.Bohren CF, Huffman DR (1983) Absorption and scattering of light by small particles. Wiley, New YorkGoogle Scholar
- 36.Barber PW, Hill SC (1990) Light scattering by particles: computational methods. World Scientific, River Edge, NJGoogle Scholar
- 39.Varadan VK, Varadan VV (1980) Acoustic, electromagnetic and elastic wave scattering: focus on the T-matrix approach. Pergamon, New YorkGoogle Scholar