SST: Dynamics of Microbeam Sensor Arrays

1项目概要：SST：微梁系统的非线性动力学智能优点：在拟议的研究中，我们的目标是通过调查由于非线性，形状和耦合到附近的悬臂梁的重要影响，以改善SPM悬臂梁在空气和真空中的操作。微束阵列的同时操作可以显着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，包括本地化和参数不稳定性。通过了解这些影响，设计和操作可以提出，使antilevers同步，导致传感器增强。这项拟议的工作将涉及建模，分析和实验。在这项工作中，微梁的非线性响应近共振将详细研究和功能将映射出的是重要的性能。分析调查将集中在微扰，对称性，和相位减少技术应用于弱非线性模型的微梁，这将允许topredict附近的共振响应。实验工作将用于参数识别，模型验证，并探讨操作regimes.The工作将集中在单个微梁和一维阵列ofmicrobeams的响应，如那些正在开发的增加通量的化学传感器。这些阵列由几个几乎相同的光束组成，这些光束与它们最近的邻居弱耦合。具有这些一般特性的系统会出现不稳定和局部响应，其中同步丢失，振动能量集中在梁的一个小子集中。分析部分的工作将集中在如何这些不稳定性和本地化的系统和激励参数的影响，以及它们影响传感器的整体性能的方式。此外，分析模型，采用intentionalpatterns的失谐将被考虑，这是已知的，以尽量减少不稳定性和本地化的影响。实验工作将被用来指导和确认的分析，并被设计为在一个synchronous manner.Broader Impacts操作的testsystems：一个综合的教育计划已被提出，它将outreach与研究生教育相结合。具体来说，目标将是通过对非线性振动和动力学的理解，以及从微尺度和纳米级工程的主题，将可观察现象的演示和解释纳入现有的推广计划。简单的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，并显示实际的，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。这些关系中至少有一个已经与小圣巴巴拉的一位老师巩固了。高在密歇根州立大学，这一推广活动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，积极鼓励学生参与工程科学。通过与当地公司Veeco的合作，将在研究生教育和技术转让方面产生更广泛的影响。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团队的一名实习生。Veeco对我们计划在这项工作中学习的技术感兴趣，并将允许学生利用UCSB无法获得的设备。团队合作：拟议的工作是Kimberly Turner（UCSB），Steven Shaw（MSU）和Jeffrey Moehlis（UCSB）之间的合作，并将在他们的家乡机构进行。两个团队的学生和PI将参与项目的各个方面，通过电子通信和MSU小组定期访问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.