Nanomaterials in 0, 1, 2, and 3-Dimensions

0、1、2 和 3 维纳米材料

• 批准号: RGPIN-2015-04493
• 负责人: Lennox, Robert
• 金额: $ 4.3万
• 依托单位: McGill 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=632289
• 关键词: Nanomaterials; Dimensions

Nanomaterials are key elements of a number of developing technologies including energy storage, biomedical devices, chemical catalysis, and advanced materials. This research program focuses on the synthesis and reactivity of two of the most important nanomaterial systems - self assembled monolayers (2D SAMs) and ligand-capped metal nanoparticles (NPs with 3D SAMs). Research will be directed to obtaining a comprehensive mechanism-based understanding of the formation and stability of multicomponent thiol-based 2D self assembled monolayers. Particular emphasis will be directed to the use of electrochemical methods to make multicomponent 2D SAMs. Potential-assisted exchange (or replacement) reactions offer the possibility a controlled entry to derivatize mono- and multi-composition SAMs in a reproducible manner. Potential control will thus be explored in detail as a means to prepare binary and ternary SAMs with a large number of RSH pairs or trios. This knowledge will provide an entry to the generation of functional nanoscale patterns in 2D SAMs. In parallel, the factors which determine metal nanoparticle growth and dispersion will be determined, with an emphasis on the role played by the NP capping ligand, or 3D SAM. In particular, the concept of a charge density-limited equilibrium size will be explored by developing an extensive structure (e.g. ligand species) –property (e.g. metal core size) map, using a wide selection of ligands. This knowledge will lead to an understanding of ligand stability and activation toward replacement reactions, and will enable methods to achieve equilibrium phase separation of a multicomponent 3D SAM into a range of nanoscale patterns.

纳米材料是能源存储、生物医学设备、化学催化和先进材料等许多发展技术的关键要素。该研究项目重点关注两种最重要的纳米材料系统的合成和反应性——自组装单层 (2D SAM) 和配体封端的金属纳米粒子（具有 3D SAM 的 NP）。 研究将旨在获得对基于多组分硫醇的二维自组装单层的形成和稳定性的全面的基于机制的理解。将特别强调使用电化学方法来制造多组分 2D SAM。电势辅助交换（或替代）反应提供了以可重复的方式受控进入单组分和多组分 SAM 的可能性。因此，将详细探讨潜在控制作为制备具有大量 RSH 对或三元组的二元和三元 SAM 的方法。这些知识将为在 2D SAM 中生成功能性纳米级图案提供切入点。同时，将确定决定金属纳米粒子生长和分散的因素，重点是 NP 封端配体 (3D SAM) 所发挥的作用。特别是，将通过使用多种配体选择来开发广泛的结构（例如配体种类）-性质（例如金属核尺寸）图来探索电荷密度限制平衡尺寸的概念。这些知识将有助于理解配体稳定性和置换反应的活化，并使方法能够实现多组分 3D SAM 平衡相分离成一系列纳米级图案。