Piezoelectric resonators based on self-assembled diphenylalanine microtubes
Piezoelectric resonators based on self-assembled diphenylalanine microtubes
复制标题
DOI：
10.1063/1.4793417
复制
发表时间：
2013-02-18
影响因子：
4
通讯作者：
Kholkin, A. L.
中科院分区：
文献类型：
--
作者：
Bosne, E. D.;Heredia, A.;Kholkin, A. L.
压电驱动已广泛应用于微电子机械器件中，包括基于共振的生物传感器、质量探测器、谐振器等。这些主要是通过硅的微加工和沉积的基于金属氧化物或钙钛矿型材料的无机压电材料来生产的，为了在生物应用中使用，这些材料必须进一步功能化。在这项工作中，我们展示了基于具有强固有压电效应的个体自组装二苯丙氨酸微管的压电驱动微机械谐振器。不同直径和长度的管子从溶液中生长出来，并组装在刚性支架上。然后使用商用原子力显微镜的导电尖端来激发振动并研究共振行为。对于长277 μ m的微管，在约2.7 MHz的基本共振频率下实现了高效压电驱动，质量因子为114。讨论了压电二肽应用于生物传感器的可能性。(C) 2013年美国物理研究所。[http://dx.doi.org/10.1063/1.4793417]
Piezoelectric actuation has been widely used in microelectromechanical devices including resonance-based biosensors, mass detectors, resonators, etc. These were mainly produced by micromachining of Si and deposited inorganic piezoelectrics based on metal oxides or perovskite-type materials which have to be further functionalized in order to be used in biological applications. In this work, we demonstrate piezoelectrically driven micromechanical resonators based on individual self-assembled diphenylalanine microtubes with strong intrinsic piezoelectric effect. Tubes of different diameters and lengths were grown from the solution and assembled on a rigid support. The conducting tip of the commercial atomic force microscope was then used to both excite vibrations and study resonance behavior. Efficient piezoelectric actuation at the fundamental resonance frequency approximate to 2.7 MHz was achieved with a quality factor of 114 for a microtube of 277 mu m long. A possibility of using piezoelectric dipeptides for biosensor applications is discussed. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793417]