Zhu Xinhua
National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China.
Recent Pat Nanotechnol. 2009;3(1):42-52. doi: 10.2174/187221009787003276.
Ferroelectric oxide materials with a perovskite structure have promising applications in electronic devices such as random access memories, sensors, actuators, infrared detectors, and so on. Recent advances in science and technology of ferroelectrics have resulted in the feature sizes of ferroelectric-based electronic devices entering into nanoscale dimensions. At nanoscale perovskite ferroelectric materials exhibit a pronounced size effect manifesting itself in a significant deviation of the properties of low-dimensional structures from the bulk and film counterparts. One-dimensional perovskite ferroelectric nanotube/nanowire systems, offer fundamental scientific opportunities for investigating the intrinsic size effects in ferroelectrics. In the past several years, much progress has been made both in fabrication and physical property testing of perovskite ferroelectric nanostructures. In the first part of this paper, the recent patents and literatures for fabricating ferroelectric nanowires, nanorods, nanotubes, and nanorings with promising features, are reviewed. The second part deals with the recent advances on the physical property testing of perovskite ferroelectric nanostructures. The third part summarizes the recently patents and literatures about the microstructural characterizations of perovskite ferroelectric nanostructures, to improve their crystalline quality, morphology and uniformity. Finally, we conclude this review with personal perspectives towards the potential future developments of perovskite ferroelectric nanostructures.
具有钙钛矿结构的铁电氧化物材料在诸如随机存取存储器、传感器、致动器、红外探测器等电子器件中有着广阔的应用前景。铁电体科学技术的最新进展使得基于铁电体的电子器件的特征尺寸进入了纳米尺度。在纳米尺度下，钙钛矿铁电材料表现出明显的尺寸效应，表现为低维结构的性能与块状和薄膜对应物有显著偏差。一维钙钛矿铁电纳米管/纳米线系统为研究铁电体中的本征尺寸效应提供了基本的科学机会。在过去的几年里，钙钛矿铁电纳米结构的制备和物理性能测试都取得了很大进展。在本文的第一部分，综述了制备具有良好特性的铁电纳米线、纳米棒、纳米管和纳米环的最新专利和文献。第二部分论述了钙钛矿铁电纳米结构物理性能测试的最新进展。第三部分总结了最近关于钙钛矿铁电纳米结构微观结构表征的专利和文献，以提高其晶体质量、形态和均匀性。最后，我们以个人观点对钙钛矿铁电纳米结构未来的潜在发展进行总结。
