22 December 2006 Laser interference deposition of silver nanoparticles on glass
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Abstract
A couple of glass plates sandwiching the molten AgNO3-KNO3 mixture at the temperature of 250°C was irradiated by pulsed Nd:YAG laser with a wavelength of 1.06μm. The irradiation induced the color of transparent yellow and orange in the glasses with the irradiation time because of the deposition of silver nanoparticles. In the observations using FE-SEM and AFM, periodically aligned structures, stripes and circles, formed by silver nanoparticles were observed in the irradiated area. The stripes had the interval of 600-700nm, and the circles had the diameters more than 40μm, the latter of which were considered to be due to the Newton's ring interference of laser on bubbles in the molten salt. On the other hand, in the experiment of two-beam irradiation, we obtained strictly aligned stripes pattern with a periodic interval of 2.6μm and a height of 50nm on the glass surface. The observed interval gave a good agreement with the theoretical length that was calculated from the wavelength and the inter-crossing angle of the coherent lasers. Moreover, the stripes pattern showed the Bragg diffraction of visible light from violet to red. From these, it was found that the laser deposition method united with light interference was useful to prepare periodic pattern of nanoparticles on a transparent substrate.
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Fuji Funabiki, Tetsuji Yano, Shuichi Shibata, "Laser interference deposition of silver nanoparticles on glass", Proc. SPIE 6413, Smart Materials IV, 64130L (22 December 2006); doi: 10.1117/12.695731; https://doi.org/10.1117/12.695731
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