Generally, the characterization of a metal layer formed on a planar substrate has been achieved using scanning electron microscopy and transmission electron microscopy. These techniques provide details of the surface and/or the crosssection of a planar structure with high resolution. However, the evaluation of sphere-like structures is troublesome owing to the necessity to observe a sample from various angles and/or to calculate the yield from many values obtained for many samples, since the conventional methods can observe a sample only from one direction. We have developed a simple evaluation method for a thin metal layer on plastic microbeads based on its light-scattering properties using dark-field microscopy coupled with a spectrometer. The light-scattering intensity of gold-nanoparticle-coated microbeads depends significantly on the gold coverage. We believe that our study is significant because it describes the development and evaluation of the surface coverage of a thin metal layer on a sphere-like microstructure. 2016
CITATION STYLE
Shiigi, H., Fujita, T., Shan, X., Terabe, M., Mihashi, A., Yamamoto, Y., & Nagaoka, T. (2016). Optical characterization of gold nanoparticle layers formed on plastic microbeads. Analytical Sciences, 32(3), 281–285. https://doi.org/10.2116/analsci.32.281
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