Influence of thin-fluid-film effects on surface characterization with dynamic atomic force microscopy

薄膜流体膜效应对动态原子力显微镜表面表征的影响

• 批准号: 0854735
• 负责人: Santiago Solares
• 金额: $ 28万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0854735&HistoricalAwards=false
• 关键词: Influence; thin; fluid; film; effects

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The research objective of this award is to develop fundamental understanding of the effect of probe-sample thin-fluid-film forces on the accuracy of dynamic atomic force microscopy (AFM) images acquired in ambient air. In particular, the work will quantify the impact of environmental, imaging parameter and chemical composition variables on the emergence of imaging artifacts, such as multistability, whereby up to an infinite number of images can be obtained for the same sample, probe and set of imaging parameters in tapping-mode AFM. The project relies on imaging and spectroscopy AFM experiments to be conducted under controlled environmental conditions with standard and customized probes, scanning tunneling microscopy and transmission electron microscopy experiments, and atomistic, continuum and nonlinear dynamics AFM simulations. Deliverables include a catalog of quantitative relationships between the parameters governing thin-fluid-film probe-sample forces and the accuracy of the acquired topographical images, multi-scale modeling and analysis tools, demonstration and validation via hardware, documentation of research results and engineering student education.If successful, the results of this research will aid in the correct interpretation of AFM experiments performed on a variety of nanostructures commonly used in high-impact technologies such as MEMS/NEMS, biotechnology, microrobotic surgery, drug design, tissue engineering, etc., where accurate topographical measurements are critical and could impact the well-being of human beings. Additionally, the application of theoretical and experimental nanoscale science to specific research problems will contribute to the education of the next-generation workforce. This will take place in the short term through enrichment of an existing multi-scale simulation course, through research internships for high-school seniors participating in the University of Maryland (UMD) Pre-College Program and through short research projects for undergraduate students enrolled in the UMD Inventis Academy of Leadership.

该奖项是根据2009年《美国复苏与再投资法》（公法111-5）资助的。 该奖项的研究目的是对探针样本薄液形 - 胶片力对在环境空气中获得的动态原子力显微镜（AFM）图像的准确性的影响进行基本了解。 特别是，这项工作将量化环境，成像参数和化学成分变量对成像伪像的出现（例如多稳定性）的影响，从而可以在Tapping-Mode AFM中获得同一样品，探针，探针和集合参数的无限图像。 该项目依靠成像和光谱法AFM实验在具有标准和自定义探针的受控环境条件下进行，扫描隧道显微镜和透射电子显微镜实验，以及原子，连续性和非线性动力学AFM模拟。 可交付成果包括管理薄胶体 - 影片探针样本的参数之间的定量关系目录，以及所获得的地形图像的准确性，多规模的建模和分析工具，通过硬件的证明和验证，硬件的证明和验证，研究结果和工程学的教育。诸如MEM/NEM，生物技术，微生物手术，药物设计，组织工程等的技术，在该技术中，准确的地形测量至关重要，可能会影响人类的福祉。 此外，理论和实验纳米级科学在特定研究问题上的应用将有助于下一代劳动力的教育。 这将在短期内通过丰富现有的多尺度模拟课程，通过参加马里兰州大学（UMD）预科课程的高中生的研究实习，以及通过为UMD Inventis Invenaties领导力学院的本科生提供的简短研究项目。