When NPs are homogeneously localized in the cell membrane, the extinction spectra exhibit the maximal plasmon peak while the other two cases have lower, broader surface plasmon features.

• 当金纳米颗粒在细胞膜上均匀分布的时候，细胞的消光光谱的峰值最大，而另外2种情况则形成较宽的消光峰。