MRI: Acquisition of Instrumentation for Real-Time Molecular Level Measurement of Atmospheric Gas- and Particle-Phase Com pounds

MRI：获取用于大气气体和颗粒相化合物实时分子水平测量的仪器

• 批准号: 2117389
• 负责人: Shan-Hu Lee
• 金额: $ 34.94万
• 依托单位: University of Alabama in Huntsville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-15 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2117389&HistoricalAwards=false
• 关键词: MRI; Acquisition; Instrumentation; Real; Time

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2). This project supports the acquisition of a FIGAERO-HR-ToF-CIMS that will enable the PI to detect various organic and inorganic compounds in gas- and particle-phases with high mass-resolution in real-time. This advanced mass spectrometer can also detect the detailed chemical composition of naturally occurring ion clusters containing sulfuric acid, ammonia, amines, iodic acids, and various highly oxidized organic molecules (HOMs) within a large range of volatilities. The instrument is also field-deployable. This instrument will greatly strengthen the research and educational infrastructure in atmospheric and climate sciences at multiple user institutions for faculty and graduate and undergraduate students, including women and underrepresented members in science and technology fields.The instrument will be shared among multiple PIs at four shared-user institutions: the University of Alabama in Huntsville, the University of Delaware, the University of Georgia, and the University of Iowa. Collaborative research underway or planned for future use of the instrument includes the following projects: (1) the chemical mechanisms of isoprene suppression of new particle formation (NPF) under the conditions relevant to mixed deciduous forests in the US; (2) how ions vs. neutral clusters and HOMs vs. sulfuric acid contribute to new particle formation at high-elevation; (3) how the chemical composition of gas- and aerosol-phase organics contribute to the growth of nanoparticles; (4) how the chemical composition and hygroscopy of organics affect the aging of marine aerosols; and (5) the novel chemistry of siloxanes involved in aerosol formation.This instrument will help an early-career female faculty member build a strong research program to study the chemical processes involved in aerosol particles and will support research in 3 EPSCoR states.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.

该奖项的全部或部分资金根据《2021 年美国救援计划法案》（公法 117-2）提供。 该项目支持购买 FigAERO-HR-ToF-CIMS，使 PI 能够以高质量分辨率实时检测气相和颗粒相中的各种有机和无机化合物。这种先进的质谱仪还可以检测天然存在的离子簇的详细化学成分，这些离子簇含有大范围挥发性的硫酸、氨、胺、碘酸和各种高度氧化的有机分子（HOM）。该仪器还可现场部署。该工具将极大地加强多个用户机构在大气和气候科学方面的研究和教育基础设施，为教师、研究生和本科生提供服务，其中包括科学技术领域的女性和代表性不足的成员。该工具将由四个共享的多个 PI 共享用户机构：亨茨维尔的阿拉巴马大学、特拉华大学、佐治亚大学和爱荷华大学。正在进行或计划未来使用该仪器的合作研究包括以下项目：（1）在美国落叶混交林相关条件下异戊二烯抑制新颗粒形成（NPF）的化学机制； (2) 离子与中性团簇以及 HOM 与硫酸如何促进高海拔下新颗粒的形成； (3)气相和气溶胶相有机物的化学成分如何促进纳米颗粒的生长； （4）有机物的化学成分和吸湿性如何影响海洋气溶胶的老化； (5) 与气溶胶形成相关的硅氧烷的新颖化学。该仪器将帮助职业生涯早期的女教员建立一个强大的研究计划，以研究气溶胶颗粒所涉及的化学过程，并将支持 3 个 EPSCoR 州的研究。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Synergetic Effects of Isoprene and HO x on Biogenic New Particle Formation

异戊二烯和 HO x 对生物新颗粒形成的协同作用

• DOI: 10.1029/2023gl103545
• 发表时间: 2023-07
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Tiszenkel, Lee;Lee, Shan‐Hu
• 通讯作者: Lee, Shan‐Hu