Engineered Interfaces of Artificial Perovskite Oxide Super lattices via Nanosheet Deposition Process
Engineered Interfaces of Artificial Perovskite Oxide Super lattices via Nanosheet Deposition Process
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DOI：
10.1021/nn102144s
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发表时间：
2010-11-01
期刊：
影响因子：
17.1
通讯作者：
Sasaki, Takayoshi
中科院分区：
文献类型：
--
作者：
Li, Bao-Wen;Osada, Minoru;Sasaki, Takayoshi
将不同的材料组合成所需的超晶格结构，可以在界面上产生新的电子状态，并有机会创造具有新性能的人工材料。在这里，我们介绍了一种新的、意想不到的、简单的方法来实现钙钛矿氧化物在Dion - Jacobson相的超晶格组装，即层状钙钛矿模型系统，采用两种不同的钙钛矿纳米片（LaNb2O7和Ca2Nb3O10）作为构建块，通过层层组装成功地制备了高质量的双色钙钛矿超晶格（LaNb2O7）（nL）（Ca2Nb3O10）（nC）。人工制备的（LaNb2O7/Ca2Nb3O10）超晶格结构独特。这在批量形式中是不可行的。通过这种人为的结构。我们发现（LaNb2O7和Ca2Nb3O10）超晶格具有一种新的界面耦合形式，从而产生铁电性。
Combining different materials into desired superlattice structures can,produce new electronic states at the interface and the opportunity to create artificial materials with novel properties. Here we introduce a new, rather unexpected, and yet simple way to such a superlattice assembly of perovskite oxides in the Dion - Jacobson phase, a model system of layered perovskites, high-quality bicolor perovskite superlattices (LaNb2O7)(nL)(Ca2Nb3O10)(nC) are successfully fabricated by a layer by layer assembly using two different perovskite nanosheets (LaNb2O7 and Ca2Nb3O10) as a building block. The artificially fabricated (LaNb2O7/Ca2Nb3O10) superlattices are structuraly unique. which is not feasible to create in the bulk form. By such an artificial structuring. We found that (LaNb2O7 and Ca2Nb3O10) superlattices possess a new form of interface coupling, which gives rise to ferroelectricity.