The carrier materials of NPs provide it with such advantages as shielding odor, long-term sustained releasing of drug, lowering toxicity, extend biologic half life of drug and gene, etc.

• 纳米粒子的载体材料可屏蔽药物不良气味、维持药物长期缓慢释放、延长药物半衰期和减小毒副作用等。