Margueritat J, Gonzalo J, Afonso C N, Hörmann U, Van Tendeloo G, Mlayah A, Murray D B, Saviot L, Zhou Y, Hong M H, Luk'yanchuk B S
Laser Processing Group, Instituto de Optica, CSIC, Serrano 121, 28006 Madrid, Spain. Centre d'Elaboration de Matériaux et d'Etudes Structurales CNRS/Université Paul Sabatier, 29, rue Jeanne Marvig, BP 94347, 31055 Toulouse Cedex 4, France.
Nanotechnology. 2008 Sep 17;19(37):375701. doi: 10.1088/0957-4484/19/37/375701. Epub 2008 Aug 1.
We report the preparation of a new type of nanocomposite containing cobalt and silver nanoparticles organized in parallel layers with a well controlled separation. This arrangement allows the observation of an enhanced low-frequency Raman signal at the vibration frequency of cobalt nanoparticles excited through the surface plasmons of silver nanoparticles. Numerical simulations of the electric field confirm the emergence of hot spots when the separation between silver and cobalt nanoparticles is small enough.
我们报道了一种新型纳米复合材料的制备，该复合材料包含以平行层排列且间距可控的钴和银纳米颗粒。这种排列方式使得在通过银纳米颗粒的表面等离子体激元激发钴纳米颗粒的振动频率处，能够观察到增强的低频拉曼信号。电场的数值模拟证实，当银和钴纳米颗粒之间的间距足够小时会出现热点。
