A spherical polystyrene (PS) microparticle with density 1.05 g/cm3 is attached by a polymer adhesive to the free end of a tipless AFM cantilever.
PS microspheres with diameters A = 1.98 µm, B = 3.6 µm, C = 6.1 µm, D = 10.8 µm and E = 14.45 µm are available.