CAJ | 학술논문

通过电纺纤维自组装制备了具有强磁性敏感性的 Fe3 O 4＠SiO 2复合纳米颗粒．电纺纤维的形貌通过扫描电镜(SEM)进行表征.纳米颗粒的尺寸分布,形貌和磁性分别通过 FESEM、TEM 和 VSM 进行确定.结果显示,该复合纳米颗粒具有近似球形的结构,并且具有多个磁性内核被包覆其中.纳米颗粒的尺寸大约为40 nm.Fe3 O 4＠SiO 2复合颗粒典型的比饱和磁化强度高达43．842 A?m2/kg,并且其在室温下具有超顺磁性.由于该磁性纳米颗粒具有强磁性敏感性,它们势必可以应用于更加广泛的领域.
통과전방섬유자조장제비료구유강자성민감성적 Fe3 O 4＠SiO 2복합납미과립．전방섬유적형모통과소묘전경(SEM)진행표정.납미과립적척촌분포,형모화자성분별통과 FESEM、TEM 화 VSM 진행학정.결과현시,해복합납미과립구유근사구형적결구,병차구유다개자성내핵피포복기중.납미과립적척촌대약위40 nm.Fe3 O 4＠SiO 2복합과립전형적비포화자화강도고체43．842 A?m2/kg,병차기재실온하구유초순자성.유우해자성납미과립구유강자성민감성,타문세필가이응용우경가엄범적영역.
We fabricated the self-assembled Fe3O4 @SiO2 magnetic composite particles with high magnetic sensi-tivity from electrospun fibers.The morphology of the fibers was characterized by SEM.The size distribution, morphology and magnetic characteristics of the nanoparticles were determined with FE-SEM,TEM,and VSM, respectively.The results show that the composite nanoparticles have approximately spherical shapes with many magnetic cores inside them.The size distribution of the nanoparticles averaged around 45 nm.The typical satu-ration magnetization of the Fe3O4 @SiO2 composite particles is up to 43.842 A?m2/kg,with superparamagnet-ic properties being observed at room temperature.Since the nanoparticles have high magnetic sensitivity,they have much promise for use in a wide range of applications.