Photoswitchable magnetic nanoparticles of prussian blue with amphiphilic azobenzene
Photoswitchable magnetic nanoparticles of prussian blue with amphiphilic azobenzene
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DOI：
10.1021/cm051060c
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发表时间：
2005-07
影响因子：
8.6
通讯作者：
Minori Taguchi;Koji Yamada;Koji Suzuki;O. Sato;Y. Einaga
中科院分区：
文献类型：
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作者：
Minori Taguchi;Koji Yamada;Koji Suzuki;O. Sato;Y. Einaga
利用反胶束技术设计并制备了一种新型的光控普鲁士蓝(PB)磁性纳米粒子。这些磁性纳米颗粒具有良好的纳米级结构。偶氮苯发色团的可逆光异构化实现了磁化强度的光开关。复合材料的光致异构化伴随着反胶束内几何受限的结构变化，这反映在偶极矩和静电场的变化上。因此，可以通过交替使用紫外光和可见光照明来可逆地切换磁化值。
A novel type of photocontrollable Prussian blue (PB) magnetic nanoparticle has been designed and prepared by using the reverse micelle technique. These magnetic nanoparticles possess a well-organized nanoscale structure. Reversible photoisomerization of azobenzene chromophores realized photoswitching of the magnetization. The photoisomerization of the composite materials was accompanied by a geometrically confined structural change within the reverse micelles, as reflected by changes in the dipole moment and the electrostatic field. As a result, the magnetization values could be switched reversibly by using alternating UV and visible light illumination.