Development of SrPbO3 for the growth of nanostructures: a feasibility study

用于纳米结构生长的 SrPbO3 的开发：可行性研究

• 批准号: EP/F066015/1
• 负责人: Steven Dunn
• 金额: $ 7.39万
• 依托单位: CRANFIELD UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF066015%2F1
• 关键词: Development; SrPbO3; growth; nanostructures; feasibility

The development of nanostructures is becoming increasingly important not only in the laboratory but also as commercial products. Major supermarkets now carry a large number of product lines that contain nanostructured particles or rely on nanostructuring for functionality, mainly in the health and beauty sections. A new, and exciting, technique for making nanostructures is based on ferroelectric lithography where the structures are made directly onto the patterned surface of a ferroelectric substrate using a photo activated state. This is a technique that has been developed at Cranfield University in collaboration with others, such as Prof D Bonnell at University of Pennsylvania. This proposal seeks to improve the photochemical performance of the ferroelectric by increasing the number of photoexcited holes available for reaction in the REDOX cycle. It is well known from literature and text books that the photochemistry of materials such as SrTiO3 and BaTiO3 is limited by the activity of holes. A recent paper has indicated that the material SrPbO3 has some of the characteristics required to increase the holes available in the system. It has a deep valance band at ca 7eV and a relatively small band gap of 1.8eV, these values mean that it should be possible to inject holes from the SrPbO3 into the standard photocell that consists of BaTiO3 (BT) or PbZrxTi1-xO3 (PZT). A review of the literature and text books indicates that when these characteristics are combined into a standard PZT or BT photo-cell an enhancement of the overall cell performance by as much as 30% could be expected. Cell performance will be measured using the photocurrent produced by the cell and also investigation as to the size and density of nanoparticles produced during irradiation.

纳米结构的发展不仅在实验室而且作为商业产品变得越来越重要。现在，主要的超市都有大量含有纳米结构颗粒或依靠纳米结构实现功能的产品系列，主要是在健康和美容领域。一种新的，令人兴奋的，用于制造纳米结构的技术是基于铁电光刻，其中使用光激活状态将结构直接制造到铁电衬底的图案化表面上。这是一项由克兰菲尔德大学与其他人合作开发的技术，如宾夕法尼亚大学的D邦内尔教授。该提议试图通过增加可用于REDOX循环中的反应的光激发空穴的数量来改善铁电体的光化学性能。从文献和教科书中众所周知，诸如SrTiO 3和BaTiO 3的材料的光化学受到空穴活性的限制。最近的一篇论文表明，SrPbO 3材料具有增加系统中可用空穴所需的一些特性。它具有约7 eV的深价带和1.8eV的相对小的带隙，这些值意味着应该可以将空穴从SrPbO 3注入由BaTiO 3（BT）或PbZrxTi 1-xO 3（PZT）组成的标准光电池。对文献和教科书的回顾表明，当这些特性结合到标准PZT或BT光电池中时，可以预期整体电池性能提高多达30%。电池性能将使用电池产生的光电流来测量，并且还将研究照射期间产生的纳米颗粒的尺寸和密度。