MRI: Acquisition of an Ultra-High Vacuum Cryogen-Free Magnet Cryostat to Enhance Multi-Disciplinary Research and STEM Education at San Francisco State University

MRI：购买超高真空无冷冻剂磁体低温恒温器以加强旧金山州立大学的多学科研究和 STEM 教育

• 批准号: 1828476
• 负责人: Akm Newaz
• 金额: $ 66.74万
• 依托单位: San Francisco State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2021-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1828476&HistoricalAwards=false
• 关键词: MRI; Acquisition; Ultra; Vacuum; Cryogen

This award, funded by the Major Research Instrumentation Program (MRI), will bring new research and teaching capabilities to three Departments and Schools at the College of Science & Engineering at San Francisco State University and six collaborating undergraduate and Ph.D. granting institutions through the acquisition of an Ultra-High Vacuum Cryogen-Free Magnet Cryostat. This magnet cryostat is a fundamental, non-invasive, complex physical property measurement system and will enable student researchers, and faculty and staff members to measure properties of nanoscale materials and devices ranging from electrical transport and thermal conductivity properties to optical, and magneto-optical properties. The acquisition of the cryostat will lead to the development of a new comprehensive nanoscale shared research facility with broadly disseminated scholarly outcomes. These include elucidating the physical properties of nanoscale materials and devices, developing new course modules, and publishing student authored/co-authored peer-reviewed articles and conference papers. The cryostat system will support the integration of research and teaching and will catalyze a new era of collaborations among seven Bay Area undergraduate and graduate institutions thereby creating new research opportunities. It will allow faculty, staff, and students to break new ground in their scientific inquiries and will have profound benefits for both the investigators and their student researchers. The training on the cryostat platform will prepare a large and diverse student body for the challenges of graduate programs and professional careers and will provide a large number of researchers from underrepresented groups the skills to become the next generation of competent scientists and engineers. Importantly, it will enable students to develop the core practical skills and technical competencies that lay the foundation for the U.S. to build talent to remain at the cutting edge of STEM fields.A low-temperature physical properties measurement system equipped with a magnet is a powerful non-invasive tool to characterize nanoscale materials and devices that are currently at the forefront of interest in materials science and condensed matter physics. This cryogen-free system is equipped with four major components: (i) a variable 12 T superconducting magnet; (ii) a variable temperature unit for measurements ranging from 1.65 K to 300 K; (iii) an electrical transport probe with a three-dimensional sample rotator; and (iv) a confocal microscope operating at cryogen temperature. The measurement capabilities include electrical transport, magnetoresistance, Hall & Quantum Hall Effect, thermal conductivity to optical, optoelectrical, magneto-optical and magneto-optoelectrical properties. The cryo-free system will allow all users to advance the frontiers of research in the following areas of materials science: (i) electronic and photonic materials (2D van der Waals crystals, van der Waals heterostructures, and memristors); (ii) metals (plasmonic nanoparticles, graphene, and ferromagnetics); (iii) semiconductors (metal oxides, wide bandgap materials; (iv) strongly correlated materials (vanadium dioxides, Weyl and Dirac semimetals) and (v) polymers with an emphasis on conductive polymers. The combination of magnetic field, electrical contacts, and optical excitation of materials at low temperatures will enable the measurement of transport properties, optical properties and optoelectrical properties of a wide range of nanoscale materials, which is of key importance for developing future nanoscale electronics and photonics devices.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.

该奖项由主要研究仪器计划（MRI）资助，将通过收购超高真空无低温磁铁低温恒温器，为旧金山州立大学科学与工程学院的三个系和学院以及六个合作的本科和博士学位授予机构带来新的研究和教学能力。这种磁体低温恒温器是一种基本的、非侵入性的、复杂的物理性质测量系统，它将使学生、研究人员和教职员工能够测量纳米材料和器件的性质，范围从电传输和导热性到光学和磁光性质。低温恒温器的收购将导致一个新的综合纳米级共享研究设施的发展，其学术成果广泛传播。这些包括阐明纳米材料和器件的物理性质，开发新的课程模块，发表学生撰写/合作撰写的同行评审文章和会议论文。低温恒温系统将支持研究和教学的整合，并将催化七所湾区本科和研究生院校之间合作的新时代，从而创造新的研究机会。它将允许教职员工和学生在他们的科学研究中开辟新的领域，并将对研究人员和他们的学生研究人员都有深远的好处。低温恒温器平台上的培训将为研究生项目和职业生涯的挑战准备一个庞大而多样化的学生群体，并将为大量来自代表性不足群体的研究人员提供成为下一代有能力的科学家和工程师的技能。重要的是，它将使学生能够发展核心实用技能和技术能力，为美国培养保持在STEM领域前沿的人才奠定基础。低温物理性能测量系统配备了磁铁是一个强大的非侵入性工具，表征纳米材料和器件，目前在材料科学和凝聚态物理的前沿兴趣。该无低温系统配备四个主要部件：(i)可变12 T超导磁体；（ii）测量范围从1.65 K到300 K的可变温度单元；（iii）带三维样品旋转器的电传输探针；（iv）在低温下工作的共聚焦显微镜。测量能力包括电输运、磁阻、霍尔和量子霍尔效应、热导率到光学、光电、磁光和磁光电特性。无低温系统将允许所有用户推进以下材料科学领域的研究前沿：(i)电子和光子材料（二维范德华晶体，范德华异质结构和忆阻器）；金属（等离子体纳米粒子、石墨烯和铁磁性材料）；（iii）半导体（金属氧化物，宽禁带材料）；（iv）强相关材料（二氧化钒，Weyl和Dirac半金属）和(v)聚合物，重点是导电聚合物。低温下材料的磁场、电接触和光激发的结合将使各种纳米材料的输运性质、光学性质和光电学性质的测量成为可能，这对开发未来的纳米级电子和光子器件具有关键意义。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Vibrational Properties of a Naturally Occurring Semiconducting van der Waals Heterostructure

天然半导体范德华异质结构的振动特性

• DOI: 10.1021/acs.jpcc.1c05241
• 发表时间: 2021
• 期刊: The Journal of Physical Chemistry C
• 作者: Costa, Viviane Zurdo;Liang, Liangbo;Vaziri, Sam;Miller, Addison;Pop, Eric;Newaz, A. K.
• 通讯作者: Newaz, A. K.