Hollow Glass Microspheres are inorganic, nonmetallic spherical materials created by specific processes, commonly with diameters in the range of 10 to 250 μm and wall thicknesses of 1 to 2 μm (Figure 1 ...

Fig. 2: Example power density spectrum of the apparent motion of a particle resting on the substrate. Without correction, the particle position seems to oscillate because of the light refraction at ...