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

该奖项的全部或部分资金来自《2021年美国救援计划法案》(公法117-2)。该项目支持收购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自然生成的离子簇的详细化学成分，这些离子簇包含硫酸、氨、胺、碘酸和各种高度氧化的有机分子(HOMS)在大范围的挥发性物质中。该仪器也可在现场部署。该仪器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，供教员、研究生和本科生使用，包括女性和科技领域代表性不足的成员。该仪器将由四个共享用户机构的多个个人投资机构共享：阿拉巴马大学亨茨维尔分校、特拉华大学、佐治亚大学和爱荷华大学。该仪器正在进行或计划在未来使用的合作研究包括以下项目：(1)在与美国落叶混交林相关的条件下，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HOMS与硫酸如何促进高海拔地区新颗粒的形成；(3)气相和气相有机物的化学组成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；以及(5)与气溶胶形成有关的新型硅氧烷化学。该仪器将帮助一名职业早期的女性教员建立一个强大的研究计划，以研究气溶胶粒子中涉及的化学过程，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优势和更广泛的影响审查标准进行评估，被认为值得支持。

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.