Materials at the Nanoscale: Structure, Properties and Applications

纳米级材料：结构、性能和应用

• 批准号: RGPIN-2017-04372
• 负责人: Bennett, Craig
• 金额: $ 1.53万
• 依托单位: Acadia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632983
• 关键词: Materials; Nanoscale; Structure; Properties; Applications

The behavior of materials with nanometer scale dimensions is often profoundly altered from that prevailing in the bulk. Dimensionality introduces an additional avenue to tune the mechanical, optical, thermal, electrical and magnetic properties which allows further exploration of the fundamental processes as well as generating new opportunities across a wide gamut of materials-related applications. Structural characterization at the nanometer scale and below is an essential component of the development and understanding of these novel materials. Using transmission electron microscopy as the primary investigative technique, the proposed research will examine low-dimensional and nanoparticle systems with applications ranging from electronics and industry to medicine and the environment. Among the systems to be investigated are nanocomposites involving superparamagnetic iron oxide particles, which have recently attracted considerable attention related to their potential for the transport of therapeutically important compounds as well as the development of improved industrial catalysts. Low-dimensional materials exhibiting charge density waves (CDW) represent a second area of research focus. A CDW is a periodic, coupled distortion of the atomic lattice and the conduction electron density often observed in transition metal chalcogenide compounds. Advances in crystal growth, have created new opportunities to investigate the effects of reduced dimensionality on CDW properties in these compounds and will provide new insights to ultimately enable these unique systems to be tuned and exploited for practical applications.

具有纳米尺度尺寸的材料的行为通常与在体中普遍存在的行为有着深刻的变化。维度引入了一个额外的途径来调整机械，光学，热学，电学和磁学性能，从而可以进一步探索基本过程，并在广泛的材料相关应用中产生新的机会。纳米级及以下的结构表征是开发和理解这些新材料的重要组成部分。利用透射电子显微镜作为主要的调查技术，这项拟议的研究将检查低维和纳米粒子系统，其应用范围从电子和工业到医学和环境。在被研究的系统中，包括超顺磁性氧化铁颗粒的纳米复合材料，最近引起了相当大的关注，因为它们具有运输治疗重要化合物的潜力，以及开发改进的工业催化剂。表现电荷密度波（CDW）的低维材料是第二个研究热点。CDW是在过渡金属硫族化合物中经常观察到的原子晶格和传导电子密度的周期性耦合畸变。晶体生长的进步为研究这些化合物中降维对CDW性质的影响创造了新的机会，并将提供新的见解，最终使这些独特的系统能够被调整和开发用于实际应用。