Enabling the Preparation of Advanced Materials through Analysis and Control of the Interfacial Chemistries of Nanoscale Materials

通过分析和控制纳米材料的界面化学来制备先进材料

• 批准号: RGPIN-2015-06763
• 负责人: Gates, Byron
• 金额: $ 4.3万
• 依托单位: Simon Fraser University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=651574
• 关键词: Enabling; Preparation; Advanced; Materials; through

Nanoscale materials are being pursued widely for a variety of applications. A critical component of harnessing the potential of these materials is the ability to controllably and reliably tune their surface and interfacial chemistries. A series of analytical studies are proposed that will advance our understanding and control of chemical modifications to the surfaces of nanoscale materials. New methods will be developed that increase the diversity of chemistries available for these surface modifications. In addition to advancing the knowledge of the field and our ability to uniformly and reproducibly modify surfaces of nanomaterials, this research will guide the development of a number of economically important technologies.****A diverse array of chemistries will be enabled for modifying the surfaces of silicon oxides. Nanomaterials are commonly coated with silicon oxides to improve their stability, but these oxides also require further chemical modification. We will create simple methods to tune the surface chemistries of silicon oxides to withstand or facilitate a variety of specific molecular interactions (e.g., binding molecular targets, chelating metal ions, and preventing other chemical interactions). These surface chemistries could be extended to materials other than silicon oxides, as well as to modifying thin films used in chromatography and biomedical devices. This research will develop scalable and potentially commercially viable methods. ****Fundamental to utilizing nanostructured materials as better electrocatalysts or more sensitive electrochemical sensors is our ability to confirm and improve our theoretical understanding of these systems. Our studies will build an experimental model through which we can refine composition, spatial distribution, and surface chemistry of such nanomaterials. We will perform a thorough analysis to better understand how to improve the chemical selectivity, activity, and stability of these materials. This understanding will facilitate development of cost effective low temperature fuel cell catalysts and sensors with increased sensitivity and selectivity for use in portable medical diagnostics for detecting dissolved chemical species. ****The unique properties of nanomaterials will also be harnessed to create a new means of chemical transformations, whether for modifying the surface chemistry of these materials or triggering larger-scale reactions. We will investigate photothermal generated heat and/or radicals to facilitate new reactions, as well as to expand our knowledge of photothermal triggered chemical processes. This knowledge will also be used to promote chemical reactions that are largely unreactive under ambient conditions. ****In summary, these advances will enrich our knowledge of the surface and interface chemistry of nanoscale materials that is needed to utilize these materials to their fullest economic potential.**

纳米级材料正被广泛地用于各种应用。利用这些材料的潜力的一个关键组成部分是可控和可靠地调整其表面和界面化学的能力。提出了一系列的分析研究，这将促进我们的理解和控制的化学修饰的纳米材料的表面。将开发新的方法，增加可用于这些表面改性的化学物质的多样性。除了推进该领域的知识和我们均匀和可重复地修改纳米材料表面的能力外，这项研究还将指导许多经济上重要的技术的发展。一系列不同的化学物质将能够用于改性氧化硅的表面。纳米材料通常涂有氧化硅以提高其稳定性，但这些氧化物还需要进一步的化学改性。我们将创造简单的方法来调整氧化硅的表面化学，以承受或促进各种特定的分子相互作用（例如，结合分子靶、螯合金属离子和防止其它化学相互作用）。这些表面化学可以扩展到氧化硅以外的材料，以及用于色谱和生物医学设备的改性薄膜。这项研究将开发可扩展的和潜在的商业可行的方法。* 利用纳米结构材料作为更好的电催化剂或更灵敏的电化学传感器的基础是我们能够确认和提高我们对这些系统的理论理解。我们的研究将建立一个实验模型，通过它我们可以细化这种纳米材料的成分，空间分布和表面化学。我们将进行全面的分析，以更好地了解如何提高这些材料的化学选择性，活性和稳定性。这种理解将有助于开发具有成本效益的低温燃料电池催化剂和传感器，其具有增加的灵敏度和选择性，用于检测溶解的化学物质的便携式医疗诊断。**** 纳米材料的独特性质也将被利用来创造一种新的化学转化手段，无论是改变这些材料的表面化学还是引发更大规模的反应。我们将研究光热产生的热量和/或自由基，以促进新的反应，以及扩大我们的光热触发化学过程的知识。这些知识也将用于促进在环境条件下基本上不起反应的化学反应。* 总之，这些进展将丰富我们对纳米材料的表面和界面化学的知识，这是利用这些材料充分发挥其经济潜力所必需的。