MRI: Development of a Scanning Probe Microscope for Resolving Fast Local Dynamics in Nanostructured Materials

MRI：开发扫描探针显微镜来解决纳米结构材料中的快速局部动力学

• 批准号: 1337173
• 负责人: David Ginger
• 金额: $ 60万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-15 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1337173&HistoricalAwards=false
• 关键词: MRI; Development; Scanning; Probe; Microscope

Technical Description: This Major Research Instrumentation award supports development of a scanning probe microscope capable of following dynamic local changes in charge density, ionic motion, polarization, and molecular cooperative phenomena with ~100 nanosecond temporal resolution. The instrument will allow these transient phenomena to be measured following optical, electrical, or thermal excitation while probing the system response with nanometer-scale spatial resolution in a controlled atmosphere and at varying temperatures. The instrument will offer capabilities including: (1) the ability to measure events taking place on ~100 ns timescales by analysis of the dynamic cantilever motion following a transient excitation; (2) the ability to excite the sample with optical pulses synchronized to the cantilever motion and to detect the resulting transient electrical, thermal, and dielectric relaxation processes with high resolution using robust, commercial AFM tips, and; (3) the ability to perform high-bandwidth non-contact frequency-modulation based dielectric measurements, and compare them with contact mode dielectric spectroscopy over a wide frequency range. By permitting these dynamic measurements to be performed at high bandwidth and high spatial resolution, the instrument will allow for future materials advances by directly connecting performance with specific structural features, even in heterogeneous films as are often encountered in real technological materials and applications.*******Non-Technical Description:The investigators at the University of Washington will build, and commission a unique scanning probe microscope capable of following dynamic local changes in electronic, ionic, and molecular properties. The microscope will be able to capture changes happening faster than 100 billionths of a second in features smaller than 20 billionths of a meter (20,000 times smaller than a hair) in size. Once completed, the microscope will be made available as part of an existing shared user facility, providing researchers within and beyond the University of Washington with capabilities to study new materials for applications that advance economically and environmentally important technologies such as new solar photovoltaics for generating low cost energy, Li-ion batteries for consumer electronics and transportation applications, thermoelectric materials for waste heat recovery and thermal management, novel ferroelectrics for use in flexible electronics and sensors, and membranes for industrially and environmentally important separations. The equipment will support the ongoing training and outreach efforts of the Advanced Materials for Energy and Molecular Engineering and Sciences Institutes at the University. The program will support training of student and postdoctoral scholars in the construction and use of next generation of instrumentation, and by encouraging ties with industry will not only provide them with educational enrichment but also support future possibilities for commercialization and widespread adoption of the developed instrumentation.

技术描述：这项重大研究仪器奖支持扫描探针显微镜的开发，该显微镜能够以约 100 纳秒的时间分辨率跟踪电荷密度、离子运动、极化和分子协作现象的动态局部变化。该仪器将允许在光学、电学或热激发之后测量这些瞬态现象，同时在受控气氛和不同温度下以纳米级空间分辨率探测系统响应。 该仪器将提供的功能包括：(1) 通过分析瞬态激励后的动态悬臂运动来测量在 ~100 ns 时间尺度上发生的事件的能力； (2) 能够用与悬臂运动同步的光脉冲激发样品，并使用坚固的商用 AFM 尖端以高分辨率检测由此产生的瞬态电、热和介电弛豫过程； (3) 能够执行基于高带宽非接触调频的介电测量，并将其与宽频率范围内的接触模式介电谱进行比较。通过允许在高带宽和高空间分辨率下进行这些动态测量，该仪器将通过直接将性能与特定结构特征联系起来，从而实现未来材料的进步，即使是在真实技术材料和应用中经常遇到的异质薄膜中也是如此。********非技术描述：华盛顿大学的研究人员将建造并委托使用一种独特的扫描探针显微镜，能够跟踪电子、 离子和分子性质。该显微镜将能够捕捉到尺寸小于十亿分之一米（比头发丝小 20,000 倍）的特征发生的速度超过 100 亿分之一秒的变化。一旦完成，该显微镜将作为现有共享用户设施的一部分提供，为华盛顿大学内外的研究人员提供研究新材料的能力，这些新材料的应用可推进经济和环境重要的技术，例如用于产生低成本能源的新型太阳能光伏、用于消费电子和运输应用的锂离子电池、用于废热回收和热管理的热电材料、用于柔性柔性材料的新型铁电材料 用于工业和环境重要分离的电子设备和传感器以及膜。该设备将支持该大学能源先进材料和分子工程与科学研究所正在进行的培训和推广工作。该计划将支持学生和博士后学者在下一代仪器的构建和使用方面的培训，并通过鼓励与工业界的联系，不仅为他们提供丰富的教育，而且支持未来商业化和广泛采用所开发仪器的可能性。