Development of new methodologies for the modification of solid surfaces and the synthesis of metal sulfide materials

固体表面改性和金属硫化物材料合成新方法的开发

• 批准号: RGPIN-2015-05443
• 负责人: Houmam, Abdelaziz
• 金额: $ 1.46万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=613555
• 关键词: Development; new; methodologies; modification; solid

The immobilization of organic and bioorganic molecules on solid surfaces is a central objective in nanotechnology and microarray technologies. A parallel chemistry can be used to synthesize metal-based materials of various shapes and sizes, which present a wide range of applications in many areas including solar energy, energy storage, catalysis, etc. Advances in these important areas are directly related to the development of new general chemical pathways for the synthesis of metal based materials, the modification of solid surfaces and the molecular manipulation and control of surface adsorbates. My long-term objective is the development of molecular electronic devices for use in sensing and energy harvesting and storage applications. My initial thrust concerns two important aspects of the chemistry necessary to make this a realizable technology; (i) the development of new approaches for the efficient modification of conducting and semiconducting surfaces with organic molecules, and (ii) the development of new simple, general, and more environmentally friendly methodologies for the synthesis of metal sulfide materials. While most experimental conditions for SAM preparation yield reproducible organic interfaces with specific desirable functionalities that are acceptable for some applications, other fundamental properties need still to be further studied and optimized including corrosion and electrochemical properties. This is intrinsically related to the development of SAMs with lower defects and increased order. On the other hand, the organic modification of oxide-free Si surfaces offering a direct combination of molecular materials and solid-state semiconductor structures and is then an attractive approach toward technologically useful and molecularly tunable thin films. For the first aspect, both conducting (Au, Ag, Cu) as well as semiconducting (Si) surfaces will be investigated. Rigorous characterization of the modified surfaces and investigation of the electrochemical properties of the formed films will be performed. The electrochemical manipulation of adsorbates on a highly local level will be investigated. For the second aspect, a wide variety of new sulfur precursors will be used to develop new methods for the synthesis of metal sulfide materials. These methods will be designed in a way to control the characteristics of these materials, on which their physical properties depend, such as composition, size and shape. Most of the present methods suffer from various drawbacks including the use ofcomplex experimental set-up, very high temperature, and toxic reagents. Our approach consists of developing methods to overcome these limitations. The idea of this proposal is to use my experience in ET based reactions and electrochemistry to develop chemical solutions to the issues of surface derivatization and local manipulation and metal based materials synthesis.

有机和生物有机分子在固体表面的固定化是纳米技术和微阵列技术的中心目标。平行化学可用于合成各种形状和尺寸的金属基材料，在太阳能、储能、催化等领域有着广泛的应用。这些重要领域的进展直接关系到金属基材料合成、固体表面修饰和表面吸附物的分子操纵和控制的新的通用化学途径的发展。我的长期目标是开发用于传感、能量采集和存储应用的分子电子器件。我最初的重点是使这项技术成为一项可实现技术所必需的化学的两个重要方面：(I)开发用有机分子有效地修饰导电和半导体表面的新方法，以及(Ii)开发用于合成金属硫化物材料的简单、通用和更环保的新方法。虽然大多数制备SAM的实验条件都可以得到具有特定理想功能的可重复性有机界面，但其他基本性能仍需进一步研究和优化，包括腐蚀和电化学性能。这与缺陷更少、有序度更高的自组装膜的发展有着内在的联系。另一方面，对无氧化物硅表面的有机修饰提供了分子材料和固态半导体结构的直接结合，因此是一种具有技术用途和分子可调薄膜的有吸引力的方法。 对于第一个方面，我们将同时研究导电(Au，Ag，Cu)和半导体(Si)表面。将对修饰表面进行严格的表征，并对形成的膜的电化学性质进行研究。我们将研究在高度局域水平上对吸附物的电化学操作。 在第二方面，将广泛使用各种新的硫磺前驱体来开发合成金属硫化物材料的新方法。这些方法的设计将以一种方式来控制这些材料的特性，这些特性取决于它们的物理特性，如组成、大小和形状。目前的大多数方法都存在各种缺点，包括使用复杂的实验装置、非常高的温度和有毒的试剂。我们的方法包括开发克服这些限制的方法。 这个提议的想法是利用我在基于ET的反应和电化学方面的经验来开发化学解决方案，以解决表面衍生化和局部操纵以及金属基材料合成的问题。