Abstract
We report on an investigation of the optical properties of gold nanoparticles assembled as thin films of different thickness. The nanoparticles were linked to the surface of a gold chip by dithiol reagents and studied by surface plasmon resonance (SPR) spectroscopy and atomic force microscopy. There is good correlation between the experimental findings and theoretical simulation, and the respective data reveal the presence of ordered nanostructures in the assemblies. The shift in the SPR angle is linearly dependent on the particle size and the ratio of the different particles. SPR spectroscopy also reveals important information in terms of the optical constants of such films. This shall be further applied to in-situ quality control in the fabrication of optoelectronic, solar cell and semiconductor devices.
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Acknowledgement
This work was supported by the New & Renewable Energy program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant (No. 20103020010050) funded by the Ministry of Knowledge Economy, Republic of Korea and by the Special Fund for Outstanding Young Teachers and Innovation Program of the Shanghai Municipal Education Commission (11YZ07), PR China.
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Chen, H., Lee, J., Kang, N.L. et al. A surface plasmon resonance study on the optical properties of gold nanoparticles on thin gold films. Microchim Acta 172, 489–494 (2011). https://doi.org/10.1007/s00604-011-0550-2
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DOI: https://doi.org/10.1007/s00604-011-0550-2