Soft materials on the nanoscale

纳米级软材料

• 批准号: 238475-2012
• 负责人: Forrest, James
• 金额: $ 4.44万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=547006
• 关键词: Soft; materials; nanoscale

Technology is pushing device production and demanding material understanding on the nanoscale. It is perhaps surprising that even when we have a detailed understanding of a bulk material that does not mean we have a similar understanding for nanoscale samples of the same material. In fact there are certainly examples where the nanoscale material behaviour would not even be predictable from bulk properties. This dearth of understanding is most prevalent for glassy material for which we can not even claim an understanding in bulk. Such deviations from "expected" behaviour is often most pronounced for what are called soft materials (polymers, colloids, proteins, glasses). The reason for this is that these materials often have characteristic length scales that are significantly larger than those of simple atomic or molecular crystalline solids. The study of glassy polymer films is one of high technological importance and has been the subject of much study - and almost equal controversy. We propose a set of experiments that has tremendous promise to alleviate all of the existing controversy, and also lead to a thorough understanding of nanoscopic glassy materials. We also propose to develop a process where fairly common experimental techniques can be used to probe the depth dependent properties of protein adsorbed onto biomaterials.

技术正在推动设备生产并要求在纳米尺度上理解材料。也许令人惊讶的是，即使我们对块体材料有了详细的了解，但这并不意味着我们对相同材料的纳米级样品有类似的了解。事实上，确实存在一些例子，纳米级材料的行为甚至无法从整体特性中预测。这种缺乏理解对于玻璃材料来说最为普遍，我们甚至不能声称对玻璃材料有大量的了解。对于所谓的软材料（聚合物、胶体、蛋白质、玻璃），这种与“预期”行为的偏差通常最为明显。其原因是这些材料通常具有比简单原子或分子晶体固体大得多的特征长度尺度。玻璃状聚合物薄膜的研究具有很高的技术重要性，并且一直是许多研究的主题，而且几乎同样引起争议。我们提出了一系列实验，这些实验有望缓解所​​有现有争议，并带来对纳米级玻璃材料的透彻理解。我们还建议开发一种方法，可以使用相当常见的实验技术来探测吸附到生物材料上的蛋白质的深度依赖性特性。