Migration of silver microparticles suspended in water by means of photophoresis induced with laser radiation.

A. R. Cruz-Garrido; A. Guzmán-Barraza; J. G. Ortega-Mendoza

doi:10.1117/12.2568113

20 August 2020 Migration of silver microparticles suspended in water by means of photophoresis induced with laser radiation.

A. R. Cruz-Garrido, A. Guzmán-Barraza, J. G. Ortega-Mendoza

Author Affiliations +

Proceedings Volume 11463, Optical Trapping and Optical Micromanipulation XVII; 1146318 (2020) https://doi.org/10.1117/12.2568113
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

In this work is presented a study of the photophoresis phenomenon induced in a group of silver microparticles suspended in distilled water. To generate this phenomenon, the light of a laser source with a wavelength of 445 nm is guided through a multimode optical fiber which is inserted inside a thin cell, where the microparticles in water are contained. Due to the high absorption by silver microparticles, an uneven uniform heat distribution is generated inside the particles and, consequently, the solvent is heated too. In such manner, the particles will experience a movement directed towards the light source. As time passes, a greater number of silver micro particles are agglomerated at the tip of the optical fiber. To observe the phenomenon in situ, a 20x microscope objective was used together with a CMOS microscope camera.

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Citation Download Citation

A. R. Cruz-Garrido, A. Guzmán-Barraza, and J. G. Ortega-Mendoza "Migration of silver microparticles suspended in water by means of photophoresis induced with laser radiation.", Proc. SPIE 11463, Optical Trapping and Optical Micromanipulation XVII, 1146318 (20 August 2020); https://doi.org/10.1117/12.2568113

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