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

该奖项全部或部分根据2021年美国救援计划法案（公法117-2）资助。 该项目支持采购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的各种有机和无机化合物。这款先进的质谱仪还可以检测自然存在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（HOM），并且具有很大的挥发性。该仪器也可在实地部署。这一工具将大大加强多个用户机构的大气和气候科学研究和教育基础设施，面向教师、研究生和本科生，包括科学和技术领域的妇女和代表性不足的成员。亨茨维尔的亚拉巴马大学、特拉华州大学、格鲁吉亚大学和爱荷华州大学。正在进行或计划在未来使用该仪器的合作研究包括以下项目：（1）在美国混合落叶林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与硫酸如何在高海拔地区促进新颗粒形成;（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;以及（5）涉及气溶胶形成的硅氧烷的新化学。该仪器将有助于早期的一名职业女性教员建立了一个强大的研究计划，研究气溶胶颗粒中涉及的化学过程，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知识价值和更广泛的影响进行评估，被认为值得支持审查标准。

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.