Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy.
Nanoscale. 2011 Nov;3(11):4647-54. doi: 10.1039/c1nr10768b. Epub 2011 Sep 27.
We report here a simple synthetic route to Au-Fe(x)O(y) heterostructures in which spinel ferrite (Fe(x)O(y)) grows as a nanorod on a spherical gold (Au) seed. The large red shift in the plasmon resonance in the heterostructures could be explained by a dielectric effect (although we could not entirely exclude a contribution due to electron transfer from Au to defect states at the Au-Fe(x)O(y) interface), while the magnetic properties of the Au-Fe(x)O(y) heterostructures were basically the same as those of the corresponding nanocrystals after Au leaching. In films of Au-Fe(x)O(y) heterostructures the electrical conductivity appeared to be mediated by the Au domains.
我们在此报告一种简单的合成方法，用于制备 Au-Fe(x)O(y) 异质结构，其中尖晶石型铁氧体 (Fe(x)O(y)) 纳米棒在球形金 (Au) 种子上生长。在异质结构中，等离子体共振的大幅红移可以用介电效应来解释（尽管我们不能完全排除由于 Au 向 Au-Fe(x)O(y) 界面的缺陷态的电子转移而产生的贡献），而 Au-Fe(x)O(y) 异质结构的磁性性质与 Au 浸出后相应的纳米晶基本相同。在 Au-Fe(x)O(y) 异质结构的薄膜中，电导率似乎是由 Au 畴介导的。
