Plasmon-assisted chemistry

等离子体辅助化学

• 批准号: 1858779
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1858779
• 关键词: Plasmon; assisted; chemistry

Metallic nanostructures have revolutionized our ability to control light on the nanoscale, via the formation of electromagnetic field hot spots due to localized surface plasmons. Plasmonics has developed into one of the most exciting areas of interdisciplinary nanoscience, affecting all areas of science and technology where light is a prominent ingredient, from biosensing to optoelectronics and quantum optics. However, up to this point most research has exclusively focused on the nanoscale light confinement aspect of surface plasmons, neglecting the charge carriers involved. Here, we want to challenge this, via the development of the notion of a plasmonic nanostructure as a means to create nanoscale hot spots of chemical reactivity via site-specific control of charge transfer. This will profoundly impact the further development of nanophotonics, photocatalysis, and nanochemistry.Surface plasmons decay on ultrafast time scales into hot carriers, and we want to establish means for their controlled extraction into desired nanoscale volumes. This will enable the development of nanoscale, site-selective surface chemistry and catalysis with high efficiency. We will develop methodologies for the spatial mapping of reactivity, and develop a physical tool kit to its control.

金属纳米结构已经彻底改变了我们在纳米尺度上控制光的能力，通过局部表面等离子体激元形成电磁场热点。等离子体动力学已经发展成为纳米科学中最令人兴奋的跨学科领域之一，影响着所有以光为主要成分的科学技术领域，从生物传感到光电子学和量子光学。然而，到目前为止，大多数研究都只集中在表面等离子体的纳米级光约束方面，而忽略了所涉及的载流子。在这里，我们想要挑战这一点，通过发展等离子体纳米结构的概念，通过特定位置的电荷转移控制来创造纳米级化学反应性热点。这将深刻地影响纳米光子学、光催化和纳米化学的进一步发展。表面等离子体在超快时间尺度上衰变为热载流子，我们希望建立一种方法，将其控制提取到所需的纳米尺度体积。这将使纳米级、位点选择性表面化学和高效催化的发展成为可能。我们将开发反应性空间映射的方法，并开发其控制的物理工具包。