MRI: Acquisition of an ultrahigh vacuum closed cryostat scanning probe microscope for nanoscale discoveries on surfaces

MRI：购买超高真空封闭式低温恒温器扫描探针显微镜，用于表面纳米级发现

• 批准号: 2216346
• 负责人: Ashleigh Baber
• 金额: $ 75.16万
• 依托单位: James Madison University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2216346&HistoricalAwards=false
• 关键词: MRI; Acquisition; ultrahigh; vacuum; closed

This award from the Major Research Instrumentation program supports the acquisition of a Scienta Omicron Infinity Scanning Probe Microscopy Lab, with a closed-loop cryostat, ultrahigh vacuum scanning tunneling and non-contact atomic force microscope. This microscope provides images on the atomic and molecular levels at low temperatures. The incorporation of closed helium loop technology rids the instrument users from needing expensive, nonrenewable helium cryogen resources, while still accessing low temperatures ( 10 K) in a low noise environment, necessary for atomic resolution. The stability of these instruments will allow the user to keep samples at low temperatures for weeks at a time, and enables users to conduct high impact, novel work at James Madison University (JMU), an undergraduate institution. The installation of the Infinity microscope at JMU will enhance the research opportunities for students by increasing the impact of research projects spanning four departments at both JMU and the University of Virginia (UVA): (JMU Chemistry/Biochemistry and Physics/Astronomy, UVA Chemistry/Biochemistry and Materials Science/Engineering). Researchers at UVA will travel to JMU to use the instrumentation to enhance their own projects while working with JMU PIs and undergraduates. These networking opportunities will enrich the experiences of JMU undergraduate researchers. Across the 9 research groups at JMU and UVA, undergraduate and graduate researchers will get hands-on experience with a state-of-the-art instrument. The Infinity microscope will provide the atomic and nanoscale resolution, electronic structure characterization, and low temperature transitions (molecular packing, electronic structure and conductivity measurements, defect morphology and rearrangement, molecular binding sites) for 9 new or ongoing projects at both JMU and UVA. These cross-disciplinary projects will involve both undergraduate and graduate students in research in 1) intermolecular interactions and substrate effects on packing, 2) electron transport in individual photosynthesis proteins, 3) surface characteristics of entropy-stabilized oxides, 4) surface electronic structures of manganese-doped indium tin oxide, 5) local electronic structures of graphene defects, 6) defect sites of nickel-based alloys, 7) geometric and electronic structures of 2D ceria nanosheets, 8) tip-induced dissociation of adsorbates, and 9) self-assembly of block copolymer structures and domains. The microscope will provide nanoscale geometric and electronic details that will further the fundamental knowledge of each particular research project. The thermally stable, low temperature scanning tunneling microscope will allow researchers to investigate the morphology and electronic structure of their conductive samples, while atomic force microscopy will highlight nanoscale intricacies on nonconductive substrates. The atomic and molecular level insights gained by this microscope will aid the fundamental understanding of fields including catalysis, corrosion, photosynthesis, polymer science, surface science, and materials science.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.

主要研究仪器计划的该奖项支持获得科学的无限扫描探针显微镜实验室，其闭环低温恒温器，超高真空扫描隧道和非接触原子力显微镜。该显微镜在低温下提供了原子和分子水平的图像。封闭的氦回路技术的结合使仪器使用者从需要昂贵的，不可再生的氦气制冷资源中，同时仍在低噪声环境中进入低温（10 K），这是原子分辨率所必需的。这些仪器的稳定性将使用户一次将样品一次在低温下保持数周，并使用户能够在本科机构詹姆斯·麦迪逊大学（JMU）进行高影响力，新颖的工作。在JMU上安​​装无限显微镜将通过增加跨越JMU和弗吉尼亚大学（UVA）四个系的研究项目的影响来增强学生的研究机会：（ JMU化学/生物化学和物理学/物理学/天文学，UVA化学/生物化学/生物化学和材料科学/工程学）。 UVA的研究人员将前往JMU使用该仪器来增强自己的项目，同时与JMU PIS和本科生合作。这些网络机会将丰富JMU本科研究人员的经验。在JMU和UVA的9个研究小组中，本科和研究生研究人员将获得最先进的工具的实践经验。 无穷大显微镜将为JMU和UVA的9个新项目提供9个新项目或持续的项目。这些跨学科的项目将涉及本科和研究生参与研究中的研究1）1）分子间相互作用和底物对包装的影响，2）2）单个光合作用蛋白中的电子传输，3）熵稳定的氧化物的表面特征，4）4）位于含锰氧化物的含锰氧化含量的含量含量的含量含量的含量的含量合金，7）2D陶瓷纳米片的几何和电子结构，8）尖端诱导的吸附物解离，以及9）块共聚物结构和域的自组装。显微镜将提供纳米级的几何和电子细节，从而进一步进一步了解每个特定研究项目的基本知识。热稳定的低温扫描隧道显微镜将使研究人员能够研究其导电样品的形态和电子结构，而原子力显微镜将突出纳米级的复杂性，对非导导性底物的复杂性。该显微镜获得的原子和分子水平洞察力将有助于对领域的基本理解，包括催化，腐蚀，光合作用，聚合物科学，表面科学和材料科学。这一奖项反映了NSF的法定任务，并认为通过基金会的知识优点和广泛的影响，通过评估来评估。