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

在固体表面上固定有机和生物有机分子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大小的金属基材料，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与金属基材料合成的新通用化学途径的发展、固体表面的改性以及表面吸附的分子操纵和控制直接相关。我的长期目标是开发用于传感和能量收集和存储应用的分子电子器件。我最初的重点是化学的两个重要方面，这是使这种技术成为可实现的技术所必需的；(1)发展用有机分子有效修饰导电和半导体表面的新方法；(2)发展新的简单、通用和更环保的方法来合成金属硫化物材料。虽然制备SAM的大多数实验条件都能产生具有某些应用可接受的特定理想功能的可再生有机界面，但其他基本性能仍需要进一步研究和优化，包括腐蚀和电化学性能。这与开发缺陷更低、有序度更高的地对空导弹有着内在的联系。另一方面，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组合，并且是技术上有用和分子可调谐薄膜的有吸引力的方法。****对于第一个方面，将研究导电（Au, Ag, Cu）和半导体（Si）表面。将对改性表面进行严格的表征，并对所形成薄膜的电化学性能进行研究。电化学操作的吸附剂在高度局部水平将进行研究。****对于第二个方面，各种新的硫前体将被用于开发合成金属硫化物材料的新方法。这些方法将被设计成一种控制这些材料的特性的方式，这些特性取决于它们的物理性质，如成分、大小和形状。目前的大多数方法都有各种各样的缺点，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。****这个建议的想法是利用我在ET基础反应和电化学方面的经验来开发表面衍生化和局部操纵以及金属基材料合成问题的化学解决方案

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.***