Noble Metal Nanocluster Formation in Epitaxial Perovskite Thin Films
Noble Metal Nanocluster Formation in Epitaxial Perovskite Thin Films
复制标题
外延钙钛矿薄膜中贵金属纳米团簇的形成
DOI：
10.1021/acsomega.7b02071
复制
发表时间：
2018
期刊：
影响因子：
4.1
通讯作者：
Lippmaa Mikk
中科院分区：
文献类型：
--
作者：
Lee Mihee;Arras Remi;Takahashi Ryota;Warot-Fonrose Benedicte;Daimon Hiroshi;Casanove Marie-Jose;Lippmaa Mikk
我们研究了在氧化物半导体基体中嵌入贵金属团簇的纳米复合材料的合成。嵌入的纳米结构在一个简单的自组织单步生长过程中形成。主要兴趣是开发用于光电化学能量转换的材料，其中空间非均匀能带结构可以增强光电产生的电荷分离和从半导体中提取载流子。我们发现在Ir: srtio3薄膜的初始生长过程中发生了金属Ir的自发偏析。横断面透射电子显微镜显示，纳米级的Ir团簇是与主晶格外延的，它们的存在是无法通过表面形貌测量检测到的。
We studied the synthesis of nanocomposite materials consisting of noble metal clusters embedded in an oxide semiconductor matrix. The embedded nanostructures form in a simple self-organized single-step growth process. The primary interest is in developing materials for photo-electrochemical energy conversion where spatially inhomogeneous band structures can enhance photogenerated charge separation and carrier extraction from a semiconductor. We show that spontaneous segregation of metallic Ir occurs during the initial growth of an Ir:SrTiO3thin film. Cross-sectional transmission electron microscopy suggests that the nanoscale Ir clusters are epitaxial with the host lattice, and their presence is not detectable by surface morphology measurements.