Ultrasensitive mass sensing using mode localization in coupled microcantilevers

作者：Matthew Spletzer, Arvind Raman, Alexander Q. Wu, Xianfan Xu, Ron Reifenberger · 发表于：Applied Physics Letters · 年份：2006 · DOI：10.1063/1.2216889 · 被引用次数：411 · 研究领域：Mechanical and Optical Resonators、Force Microscopy Techniques and Applications、Photonic and Optical Devices

We use Anderson or vibration localization in coupled microcantilevers as an extremely sensitive method to detect the added mass of a target analyte. We focus on the resonance frequencies and eigenstates of two nearly identical coupled gold-foil microcantilevers. Theoretical and experimental results indicate that the relative changes in the eigenstates due to the added mass can be orders of magnitude greater than the relative changes in resonance frequencies. Moreover this sensing paradigm possesses intrinsic common mode rejection characteristics thus providing an alternate way to achieve ultrasensitive mass detection under ambient conditions.