SST: Dynamics of Microbeam Sensor Arrays

项目概述：SST：微梁系统的非线性动力学智力优点：在提出的研究中，我们的目标是通过研究非线性、形状和与附近悬臂梁耦合的重要影响来改善SPM悬臂梁在空气和真空中的运行。微束阵列的同步操作可以显著提高化学和力传感器、成像和数据存储等应用的吞吐量。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，可以提出设计和操作，使反杠杆同步，从而增强传感器。这项提议的工作将包括建模、分析和实验。在这项工作中，将详细研究微梁近共振的非线性响应，并绘制出影响性能的重要特征。分析研究将集中在微光束弱非线性模型的微扰、对称和相位消减技术上，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，并探索分析建议的操作制度。这项工作将集中在单个微光束和一维微光束阵列的响应上，比如那些为提高化学传感器的吞吐量而开发的微光束阵列。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。已知具有这些一般特征的系统会经历不稳定性和局部响应，其中同步丢失并且振动能量集中在梁的小子集中。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，以及它们影响传感器整体性能的方式。此外，还将考虑采用故意失谐模式的分析模型，这些模型已知可以最大限度地减少不稳定性和局部化的影响。实验工作将用于指导和确认分析，并测试设计为以同步方式运行的系统。更广泛的影响：一项综合教育计划已经提出，将外展与研究生教育结合起来。具体来说，目标是将可观察到的现象的演示和解释结合起来，这些现象可以通过对非线性振动和动力学的理解来解释，以及从微尺度和纳米尺度工程到现有扩展计划的主题。简单悬臂式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。在加州大学圣巴巴拉分校，这些课程将通过与当地教师合作开发。这些关系中至少有一种已经与圣巴巴拉高中的一位老师建立了牢固的关系。在密歇根州立大学，这种推广将通过密歇根州立大学高中工程研究所进行，该研究所以中学生为目标，积极鼓励他们参与工程科学。在研究生教育和技术转让方面，更广泛的影响将部分通过与当地公司Veeco的合作来实现。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，并资助了Veeco的研究生实习生，其中包括PI小组的一名实习生。Veeco对我们计划在这项工作中学习的技术很感兴趣，并将允许学生使用UCSB没有的设备。团队合作：提议的工作是由Kimberly Turner （UCSB）、Steven Shaw（MSU）和Jeffrey moehis （UCSB）合作完成的，并将在他们各自的机构进行。两个团队的学生和pi将参与项目的各个方面，通过电子通信和密歇根州立大学团队定期访问UCSB的设施来保持最新状态。

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.