Physics Department, University of Wisconsin-Milwaukee, 1900 E. Kenwood Blvd., Milwaukee, Wisconsin 53211, USA.
Langmuir. 2012 Oct 16;28(41):14777-83. doi: 10.1021/la301942t. Epub 2012 Jul 25.
The microradian X-ray scattering technique is used to investigate the colloidal crystallization of silica/magnetite core-shell magnetic nanoparticles. Particle self-assembly ranging from 2D sheets to 3D semicrystalline structures is observed as a function of the sedimentation-induced variation of the local particle concentration and the applied magnetic field. Because the particle size is comparable to the wavelength of light, these structures possess photonic properties that can be manipulated by an external stimulus.
微弧度 X 射线散射技术用于研究二氧化硅/磁铁矿核壳磁性纳米粒子的胶体结晶。观察到粒子自组装从 2D 片层到 3D 半晶结构，这是由于沉降引起的局部粒子浓度和施加磁场的变化。由于颗粒尺寸与光的波长相当，这些结构具有光子特性，可以通过外部刺激进行控制。
