SST: Dynamics of Microbeam Sensor Arrays

SST：微束传感器阵列的动力学

• 批准号: 0428916
• 负责人: Kimberly Foster
• 金额: $ 40万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0428916&HistoricalAwards=false
• 关键词: SST; Dynamics; Microbeam; Sensor; Arrays

1Project Summary: SST: Nonlinear Dynamics of Microbeam SystemsIntellectual Merit: In the proposed study we aim to improve the operation of SPM cantilevers inair and vacuum by investigating important effects due to nonlinearity, shape, and coupling to nearbycantilevers. Simultaneous operations of microbeam arrays can lead to significantly increasedthroughput in applications including chemical and force sensors, imaging, and data storage. Theseeffects can lead to dynamically interesting phenomena, including localization and parametricinstability. By understanding these effects, design and operation can be proposed which allow thecantilevers to synchronize, leading to sensor enhancement. This proposed work will involvemodeling, analysis, and experimentation. In this work the nonlinear response of microbeams nearresonance will be investigated in detail and features will be mapped out that are important forperformance. The analytical investigations will focus on perturbation, symmetry, and phasereduction techniques applied to weakly nonlinear models for microbeams, which will allow one topredict the response near resonance. Experimental work will be used for parameter identification,model verification, and to explore operating regimes suggested by the analysis.The work will focus on the response of individual microbeams and one-dimensional arrays ofmicrobeams, such as those being developed for increased throughput of chemical sensors. Thesearrays are composed of several nearly identical beams that are weakly coupled to their nearestneighbors. Systems with these general characteristics are known to experience instabilities andlocalized responses, wherein synchronization is lost and the vibration energy is concentrated in asmall subset of beams. The analytical part of the work will concentrate on how these instabilitiesand localization are influenced by system and excitation parameters, and the manner in which theyaffect overall performance of the sensor. In addition, analytical models that employ intentionalpatterns of mistuning will be considered, which are known to minimize the effects of instability andlocalization. The experimental work will be used to guide and confirm the analysis, and to testsystems that are designed to operate in a synchronous manner.Broader Impacts: An integrated educational plan has been proposed which integrates outreachwith graduate education. Specifically, the goal would be to incorporate demonstrations andexplanations of observable phenomena that can be accounted for through an understanding ofnonlinear vibrations and dynamics, as well as topics from microscale and nanoscale engineering, toexisting outreach programs. The mechanics principles behind simple cantilever sensors can be usedto illustrate how simple physics principles are used to develop sensors, and show practical, excitingapplication of science. At UCSB these programs will be developed through collaborations with localteachers. At least one of these relationships has already been solidified with a teacher at SantaBarbara Jr. High. At MSU, this outreach would occur via the MSU High School EngineeringInstitute, which targets secondary school students and actively encourages participation in theengineering sciences.Broader impact in graduate education and technology transfer will be achieved in part throughpartnerships with Veeco, a local company. Veeco has a long-standing relationship with UCSB.Veeco is currently a member of the California Nanosystems institute, and has funded graduatestudent interns at Veeco, including one from the PI's group. Veeco is interested in the technologywe plan to study in this effort, and will allow students to utilize equipment unavailable at UCSB.Teaming: The proposed effort is a collaboration between Kimberly Turner (UCSB), Steven Shaw(MSU), and Jeffrey Moehlis (UCSB), and will be carried out at their home institutions. The studentsand PIs on both teams will be involved in all aspects of the project, keeping up to date via electroniccommunication and by regular visits by the MSU group to the facilities at UCSB.

1项目总结：SST：微梁系统的非线性动力学智能优点：在拟议的研究中，我们的目标是通过研究非线性、形状和与附近悬臂梁的耦合所产生的重要影响来改善SPM悬臂梁在空气和真空中的运行。微束阵列的同时运行可以显著提高化学和力传感器、成像和数据存储等应用中的吞吐量。这些效应可以导致动态有趣的现象，包括局部化和参数不稳定性。通过了解这些影响，可以提出允许杠杆同步的设计和操作，从而提高传感器的性能。这项拟议的工作将涉及建模、分析和实验。在这项工作中，将详细研究微梁在共振附近的非线性响应，并绘制出对性能有重要意义的特征。分析研究将集中在微束的弱非线性模型中应用的微扰、对称性和相减技术，这将使人们能够预测共振附近的响应。实验工作将用于参数识别、模型验证和探索分析建议的操作模式。工作重点将放在单个微束和一维微束阵列的响应上，例如为增加化学传感器的吞吐量而开发的微束阵列。这些射线是由几个几乎相同的光束组成的，这些光束与它们最近的邻居弱耦合。具有这些一般特征的系统会经历不稳定和局部响应，其中同步丢失，振动能量集中在梁的一小部分中。这项工作的分析部分将集中在这些不稳定性和局部化如何受到系统和激励参数的影响，以及它们如何影响传感器的整体性能。此外，还将考虑采用有意错误调谐模式的分析模型，这将使不稳定和局部化的影响降至最低。实验工作将被用来指导和确认分析，并测试被设计为以同步方式运行的系统。广泛的影响：已经提出了将外展与研究生教育相结合的综合教育计划。具体地说，目标将是将可通过了解非线性振动和动力学来解释的可观察现象的演示和解释，以及从微尺度和纳米尺度工程的主题纳入现有的推广计划。简单悬臂梁传感器背后的力学原理可以用来说明如何使用简单的物理原理来开发传感器，并展示实际的、令人兴奋的科学应用。在UCSB，这些项目将通过与当地教师的合作来开发。其中至少有一段关系已经与小桑塔芭芭拉的一位老师巩固了下来。很高。在密歇根州立大学，这种扩展将通过密歇根州立大学高中工程学院进行，该学院以中学生为目标，并积极鼓励参与工程科学。在研究生教育和技术转让方面的广泛影响将部分通过与当地公司Veeco的合作实现。Veeco与UCSB有着长期的合作关系。Veeco目前是加州纳米系统研究所的成员，并为Veeco的毕业生实习生提供资金，其中一人来自PI的团队。Veeco对我们计划在这项工作中学习的技术感兴趣，并将允许学生使用加州大学伯克利分校没有的设备。团队：拟议的工作是金伯利·特纳(UCSB)、Steven Shaw(密歇根州立大学)和Jeffrey Moehlis(UCSB)之间的合作，将在他们的家乡机构进行。两个团队的学生和PI将参与项目的所有方面，通过电子通信和密歇根州立大学小组定期访问UCSB的设施来了解最新情况。