Plasmon-induced Triplet Energy Transfer (PITET) for Photon Upconversion

用于光子上转换的等离激元诱导三重态能量转移 (PITET)

• 批准号: 2003544
• 负责人: Ming Tang
• 金额: $ 45万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2021-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2003544&HistoricalAwards=false
• 关键词: Plasmon; induced; Triplet; Energy; Transfer

With this award, the Macromolecular, Supramolecular, and Nanochemistry Program in the Chemistry Division is supporting Dr. Ming Lee Tang at the University of California Riverside (UCR) to study the energy transfer process of plasmonic systems. Plasmonics refers to light-induced oscillation of loosely bound electrons in metals. This research is important for catalysis, imaging, and energy conversion applications. Minuscule metal particles with dimensions on the order of nanometers have been treasured historically for their beauty in stained glass windows. The vivid colors in stained glass arise from the strong absorption and scattering of light due to plasmons supported by the metal nanoparticles. Dr. Tang’s team is conducting fundamental research that addresses that seeks to efficiently transfer the energy stored as plasmons in metal nanoparticles to neighboring chemical molecules. The research aims to provide mechanisms to prevent the system from unwanted energy loss through rapid scattering of light or dissipation of energy as heat. Such advances are essential for the development of metal nanoparticles for intended applications in photocatalysis and in solar cells. The team designs and synthesizes various nanomaterial architectures. Plasmons tightly confined within the nanoscale metal architectures are then characterized to tune the system to perform useful work upon light activation. This research also has broader impacts of engaging the general public in the Inland Empire program in Southern California. This outreach program includes interactive demonstrations and science activities at local elementary schools and pre-schools that are led by undergraduate and graduate students.Dr. Ming Lee Tang’s team at UCR is investigating plasmon-induced triplet energy transfer. The goal is to use light captured by metal nano-antennas for photon upconversion, a process of converting low energy photons from incoherent sources such as the sun to useful high energy photons. Novel light-absorbing nanostructures based on noble metals in this research can absorb near-infrared photons to produce violet photon emissions from neighboring anthracene- and perylene-based chromophores. Specifically, silver nanoprisms and gold nanorods with their localized surface plasmon resonance tuned between 1.5 and 1.8 eV are expected to be resonant with the lowest excited triplet states of the chromophores, so as to photosensitize the molecular triplet states across an oxide barrier. Steady-state photon upconversion measurements will be used to quantify the efficiency of plasmon-induced triplet energy transfer. Time resolved photoluminescence and transient absorption measurements provide independent measurements of the yield and rate of the triplet energy transfer.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

通过此奖项，化学部门的宏观分子和纳关术计划是加利福尼亚河滨（UCR）的Ming Lee Tang博士，以研究等离子系统的能量转移过程。从历史上看，彩色玻璃窗口的美感。用于热量的光或耗散的元素。在加利福尼亚州，在当地小学的磨难和科学活动。从诸如太阳等近亲金属上的近亲近红外光子上的高gy光子中的低能光子转换为紫罗兰色pholet pholet pholet pholet pholet pholet pholet pholet pholet pholet pholet pholeth预计将纳米型和1.5和1.8介于1.8之间的NOROD与发色团的最低站共呼应，以便将势垒稳态光子上升测量值量化吸收测量值对三胞胎能量转移的收益率和速率的依赖性。这反映了NSF'SF'Story Mission，并通过使用Toundation的知识分子优点和更广泛的影响来评估标准，被认为值得通过评估来获得支持。