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采用发光细菌法考察了纳米材料的形状对其毒性的影响.通过对硫化镉(CdS)量子点、米粒状的硫化镉棒以及多臂硫化镉棒毒性的评价,发现多臂硫化镉棒在三者中尺寸最大,毒性最大;而粒径最小的硫化镉量子点毒性最小.实验证实,这3种硫化镉纳米粒子均可进入细菌,产生不同的毒性.紫外照射和维生素C实验证明了这几种硫化镉纳米材料的毒性差异与其形状有关,其原因在于不同形状的纳米粒子对细胞膜具有不同的刺伤能力.
The effect of shape of nanomaterials on its toxicity was investigated by luminescent bacteria method.Based on the evaluation of the toxicity of CdS quantum dots, grain-shaped cadmium sulfide rods and the multi-armed cadmium sulfide rods, The largest in size, the most toxic; and the smallest particle size cadmium sulfide quantum dots the least toxicity experiments confirmed that these three kinds of cadmium sulfide nanoparticles can enter the bacteria, have different toxicity. UV irradiation and vitamin C experiments show that these The toxicity of CdS nanomaterials is related to their shape due to the different stab-resistant capabilities of different shaped nanoparticles to the cell membrane.