纳米材料指外部尺寸或内部结构处于纳米级别,至少有一维尺寸介于1~100 nm之间,具有特殊性能的新型材料,如金属或金属氧化物、碳纳米管、石墨烯、有机纳米颗粒或纳米复合材料等,不同于非纳米级的同类物质,其在光学、热学、电学、磁学、力学以及化学等方面具有独特的性质~([1])。近年来,纳米技术发展迅速并且具有巨大的市场潜力。2012年,为充分认识和把握纳米类产品的安全性问题,经过专家论证,国家食 Nanomaterials refer to new materials with special properties such as metal or metal oxides, carbon nanotubes, graphene, organic nanoparticles, or nano-particles with external dimensions or internal structures on the order of nanometers and at least one dimension ranging from 1 to 100 nm Nanocomposites, etc., which are different from non-nano-like substances, have unique properties in optics, heat, electricity, magnetism, mechanics and chemistry. In recent years, nanotechnology has developed rapidly and has great market potential. In 2012, in order to fully understand and grasp the safety issues of nano-products, after experts argued that the national food