摘要
以氧化铁纳米颗粒为代表的医药磁性纳米材料,近年来在医学健康领域得到越来越多的重视.作为唯一得到食品药品监督管理局(FDA)批准,可临床使用的无机功能纳米材料,氧化铁纳米颗粒在纳米生物医学的研究和应用中发挥着至关重要的作用.本文将聚焦于氧化铁纳米颗粒等医药磁性纳米材料,主要基于本实验室的相关研究工作,介绍该领域的研究和发展.主要从如下几个方面进行论述:医药磁性氧化铁纳米材料的制备、医药磁性氧化铁纳米材料的磁学性质、医药磁性氧化铁纳米材料的生物效应、医药磁性氧化铁纳米材料的组装和性质调控以及医药磁性纳米材料及技术的发展趋势.
Medical magnetic nanomaterials refer to magnetic nanomaterials owning specific biological effects and therapeutic functions which are promising in clinical medicine. A good case in this point is the iron-based magnetic nanomaterials. As the only inorganic nanomaterials approved by FDA for clinical use, iron oxide nanoparticles play a vital role in fundamental research and clinical application of nanomedicine. This feature article mainly focused on the state-of-art of iron oxide nanoparticles on the basis of our own works. The following sections were included in this feature article: Preparation and magnetic property, biological effects, assembly and future development, which was intended to clarify the particularity, importance and complexity of magnetic nanomaterials applied in clinical medicine. Although thermal decomposition method can get iron oxide nanocrystals with better morphology, coprecipitation method is more suitable for the use in clinic. This issue will be emphasized. Superparamagnetism is a prominent advantage of magnetic nanomaterials for medical applications, which is closely related to their size and morphology. The biological effects of iron oxide nanoparticles are versatile and can be regulated by chemical composition, morphology and surface modification. In recent years, some new biological effects of iron oxide nanoparticles still have been found, such as the enzymatic effect. Another outstanding property of magnetic nanomaterials is that the collective property can be regulated by control of assembled structures and interactions between the nanoparticles without changing the property of monomers. Here, the magnetic field-controlled assembly of magnetic nanoparticles and the property regulation will be discussed in detail. In the future, we should firstly further investigate the synthesis of medical magnetic nanomaterials of high performance and expand the clinical applicability. Certainly, the new clinical nanodrugs should be developed. Then, the biological effects of magnetic nanomaterials in the presence of magnetic field should be explored deeply, from which we may discover some new paradigms for the clinic. Finally, the novel characterization techniques and strategies for diagnosis and treatment should be developed. We believe the magnetic nanomaterials will make the society more glorious.
引文
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