Photo-Stimulated Nanopattern Formation Dynamics on Ferroelectric Surfaces

技术：这个项目是关于在极性图案铁电材料表面通过光诱导过程形成纳米图案。利用光电子发射显微镜（PEEM）和扫描探针方法对铁电材料的纳米级表面特性进行了表征。该研究项目结合化学、光增强和热方法，通过控制筛选制备极性图案铁电表面。原位表面处理和氧化薄膜的沉积可以提供具有增强电场的均匀端接表面，该电场反映了铁电畴的纳米图案。表面状态、缺陷和极化束缚电荷导致带弯曲效应，这有助于光致沉积过程。光诱导纳米图案形成的第二种方法是将沉积在铁电表面的二氧化钒结合起来，驱动绝缘体-金属的转变，这种转变遵循纳米图案域。非技术：该项目涉及支撑纳米模式形成方法的科学，这可能会影响电子或传感器技术。跨学科的研究环境将使参与这项研究的研究生和本科生获得专业知识，以考虑从事电子或传感器技术开发的职业。该项目还提供了将研究生研究人员与亚利桑那州立大学纳米科学专业硕士候选人配对的综合项目。通过亚利桑那州立大学的“科学是有趣的”项目，对铁电材料的新演示将成为向凤凰城地区K-12学生展示的项目的一部分。

Technical: This project is on nanopattern formation enabled by photo-induced processes at the surface of polarity patterned ferroelectric materials. The nanoscale surface properties of the ferroelectric materials are characterized using photo electron emission microscopy (PEEM) and scanned probe approaches. The research project combines chemical, photo-enhanced and thermal approaches to prepare polarity patterned ferroelectric surfaces with controlled screening. In situ surface processing and deposition of thin oxide films can provide uniformly terminated surfaces with enhanced electric fields which reflect the nanopatterns of the ferroelectric domains. Surface states, defects and the polarization bound charge lead to band bending effects which contribute to the photo-induced deposition process. A second approach for photo-induced nanopattern formation combines vanadium dioxide deposited on ferroelectric surfaces to drive an insulator-metal transition which follows the nanopatterned domains.Nontechnical: The project addresses the science that underpins approaches for nanopattern formation which could impact electronics or sensor technologies. The interdisciplinary research environment will enable the graduate and undergraduate students involved with this research to gain the expertise to consider a career in electronics or sensor technology development. The project also provides integrated projects that pair graduate student researchers with candidates of the ASU Professional Science Masters in Nanoscience. The K-12 education outreach is through the ASU Science is Fun program and a new demonstration on ferroelectric materials will become part of program for presentation to Phoenix area K-12 students.