Temperature dependence of the diameters of PNIPAM microspheres with different thermosensitivities. The diameters are obtained by dynamic light scattering. Particle B (red squares) is more sensitive to temperature than particle A (black squares), the straightlines are linear fits to the measured data. Snapshots of sample structures at 28.5℃, 27.5℃, and 25.0℃ are shown in the insets from right to left.