光トラップ法を用いた固体表面近傍の粘性評価

抄録

Optical trapping is a promising technology for micromechanics, biotechnology and so on. Micro-scale object can be trapped and manipulated by optical trapping. In this study, we carried out experiment of manipulation of a glass beads on a slide glass. While the experiment in air results in failure, the beads in a water droplet can be manipulated. The trapping force can't overcome the gravitational force or an adhesive force by capillarity between the beads and the slide glass. Its manipulating performance in the water droplet is dependent on size of the beads and velocity of the manipulation. This would be because of viscous effect by fluid surrounding of the bead. On the contrary, viscosity near the slide glass can be evaluated with the result of the optical trapping manipulation.