Yamamoto Takashi, Umemura Yasushi, Sato Osamu, Einaga Yasuaki
Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan.
J Am Chem Soc. 2005 Nov 23;127(46):16065-73. doi: 10.1021/ja053131e.
Thin films of cobalt-iron cyanide (Co-Fe Prussian blue) have been fabricated by means of the modified Langmuir-Blodgett (LB) method using a smectite clay mineral (montmorillonite). In this combined method, clay LB films play a template role in the formation of the Co-Fe Prussian blue thin layer. The films were revealed to possess a well-organized structure not only in perpendicular directions to the film surface but also in parallel directions to the film surface. The photoinduced electron transfer from the iron ion to the cobalt through the bridging cyanide in the films occurred at low temperature (8 K), similar to that in the bulk Co-Fe Prussian blue. The films clearly exhibited magnetic anisotropy with regards to the direction of the applied magnetic field. Moreover, the photoinduced magnetization effect in the films was also found to be anisotropic.
通过使用蒙脱石这种蒙脱石粘土矿物，采用改进的朗缪尔-布洛杰特（LB）方法制备了钴铁氰化物（钴铁普鲁士蓝）薄膜。在这种组合方法中，粘土LB膜在钴铁普鲁士蓝薄层的形成中起模板作用。结果表明，这些薄膜不仅在垂直于薄膜表面的方向上具有良好的组织结构，而且在平行于薄膜表面的方向上也具有良好的组织结构。薄膜中通过桥连氰化物从铁离子到钴的光致电子转移在低温（8K）下发生，这与块状钴铁普鲁士蓝中的情况类似。这些薄膜在施加磁场的方向上明显表现出磁各向异性。此外，还发现薄膜中的光致磁化效应也是各向异性的。
