Development of functional hybrid organic/inorganic architectures : methodology and applications

功能性混合有机/无机结构的开发：方法和应用

• 批准号: RGPIN-2017-05865
• 负责人: Claverie, Jerome
• 金额: $ 5.39万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=711840
• 关键词: Development; functional; hybrid; organic; inorganic

Our research program aims at the conception (design, synthesis, characterization and property assessment) of functional hybrid materials. Due to their unique electronic and optical properties, inorganic nanostructures are exponentially used for a plethora of applications. However, they are difficult to exploit on a large scale due, inter alia, to their absence of solubility, their tendency to agglomerate, their poor adhesion and their lack of cohesiveness. To address these issues, surfactants, binders, surface-ligands, dispersants must be employed, but their presence is often responsible for a deterioration of the electronic or optical performance of the material. Here, we will explore the dispersion of nanoparticles and nanotubes using ephemeral surfactants, a novel class of surfactants which are surface-active in solution, but which evaporate in the solid-state. For this purpose, we will explore the copolymerization of a variety of olefin monomers with sulfur dioxide to form an amphiphilic polymer capable of stabilizing nanomaterials in solution. Interestingly, such polymers are also self-immolative: under the action of a heat, light or acid stimulus, they depolymerize into volatile monomeric units. As a contingency plan, we will also explore the anionic polymerization of aldehydes for the formation of ephemeral surfactants. The resulting dispersions will be used to form conducting inks, with the expected outcome that a higher conductivity be reached due to the absence of interfacial organic material at the interface between conducting nanoparticles or nanotubes. We will also explore the formation of a graphitizing polymer. Such polymer is soluble and processable, but under the action of a stimulus, it transforms into graphite. For this purpose, the chemistry of poly paraphenylene methylene will be investigated. A photoacid generator which decomposes under illumination will be used to trigger the transformation into graphite. The use of graphitizing polymers offer the possibility of direct laser writing of intractable graphite on a wide range of materials. Overall, this research program could have a significant impact of the formulation of nanomaterials for application for the microelectronic industry. Four PhD students and two undergraduate students will be supported each year, making the formation of highly qualified personnel an essential component of our research program.

我们的研究计划旨在功能杂化材料的概念（设计、合成、表征和性能评估）。由于其独特的电子和光学特性，无机纳米结构的应用呈指数级增长。 然而，它们难以大规模开发，尤其是由于它们缺乏溶解性、它们易于附聚、它们的粘附性差以及它们缺乏内聚性。为了解决这些问题，必须使用表面活性剂、粘合剂、表面配体、分散剂，但它们的存在通常会导致材料的电子或光学性能恶化。 在这里，我们将探索使用短暂表面活性剂分散纳米粒子和纳米管，这是一类新型表面活性剂，在溶液中具有表面活性，但在固态时会蒸发。为此，我们将探索多种烯烃单体与二氧化硫的共聚，形成能够稳定溶液中纳米材料的两亲性聚合物。有趣的是，此类聚合物也是自焚的：在热、光或酸刺激的作用下，它们解聚成挥发性单体单元。 作为应急计划，我们还将探索醛的阴离子聚合以形成短暂表面活性剂。所得分散体将用于形成导电油墨，由于导电纳米颗粒或纳米管之间的界面处不存在界面有机材料，因此预期可达到更高的电导率。 我们还将探索石墨化聚合物的形成。这种聚合物是可溶的和可加工的，但在刺激的作用下，它会转变为石墨。为此，将研究聚对亚苯基亚甲基的化学性质。在光照下分解的光致产酸剂将被用来引发石墨转变。石墨化聚合物的使用提供了在多种材料上直接激光写入难处理石墨的可能性。 总体而言，该研究计划可能会对微电子行业应用的纳米材料配方产生重大影响。 每年将支持四名博士生和两名本科生，使高素质人才的培养成为我们研究计划的重要组成部分。