Figure 2. 3D helical TVFs enable stable out-of-plane rotation and stationary spinning of microparticles in high-viscosity environments. (IMAGE)
Caption
Figure 2. 3D helical TVFs enable stable out-of-plane rotation and stationary spinning of microparticles in high-viscosity environments. (a) A back-and-forth line-by-line scanning sequence largely eliminates the net flow along the x-direction. Measured 3D single-particle trajectory reveals opto-hydrodynamic rotation and focusing of the particle (with a diameter of 1 μm) at a stable x-position. (b) Demonstration of particle accumulation with high throughput, where dense clustering occurs within only a few seconds of illumination. (c) Evolutionary pathway from rotation to binding, leading to a stable spinning dimer. (d) Left: Schematic (top) and experimental image of the photobleaching of individual fluorescent, perfectly spherical microparticles. Middle: Measured fluorescence intensity of a stably spinning, inhomogeneously photobleached particle as a function of time. Right: Histogram of the particle’s x and y positions.
Credit
Prof. Moritz Kreysing et al.
Usage Restrictions
Credit must be given to the creator.
License
CC BY