Fig. 1. Schematic representation of the PNIPAM tethered to nanoparticle surface. Bonding between PNIPAM and SCN^– by formation of P—S bonds. 接枝在纳米粒子表面的PNIPAM球面刷系统(其中SCN^–通过P—S键与PNIPAM结合)

Fig. 2. Height of the grafted PNIPAM brushes as a function of temperature. The P—S bond energetic gain is chosen as , and the entropic loss is given by . The surface coverage is . 接枝在纳米粒子表面的PNIPAM球面刷高度随温度的变化关系(其中结合能参数为 , 熵的损失为 , , 接枝密度为 )

Fig. 3. Local fraction of P—S bond as a function of SCN^– concentration at a given temperature of T = 31 ℃. All parameters are the same as those in Fig. 2. P—S 键分数在垂直纳米粒子表面方向的分布(其中温度T = 31 ℃, 其余参数与图2相同)

Fig. 4. Electrostatic potential as a function of the distance from the surface at different thiocyanate anion concentrations at a given temperature of T = 31 ℃. All parameters are the same as those in Fig. 2体系静电势在距离垂直纳米粒子表面方向的分布(温度T = 31 ℃, 其余参数与图2相同)

Fig. 5. Average volume fractions of the grafted PNIPAM chains as a function of the distance from the surface for C = 750 mmol: (a) ; (b) . All parameters are the same as those in Fig. 2C = 750 mmol时PNIPAM分子链单体的平均体积分数在垂直纳米粒子表面方向的分布　(a) (b) ; 其余参数与图2相同

Fig. 6. Height of the grafted PNIPAM brushes as a function of temperature at C = 750 mmol. The – 2.25 + 95/ T. All parameters are the same as those in Fig. 2. C = 750 mmol时PNIPAM球面刷高度随温度的变化(其中 , 其余参数与图2相同)