Casimir force experiments with quartz tuning forks and an atomic force microscope (AFM)
Casimir force experiments with quartz tuning forks and an atomic force microscope (AFM)
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DOI：
10.1088/1751-8113/41/16/164025
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发表时间：
2008-04-25
影响因子：
2.1
通讯作者：
Ludwig, T.
中科院分区：
文献类型：
--
作者：
Ludwig, T.
测量系列的目的是研究卡西米尔力，特别是不同材料和几何形状的影响。测量亚纳米牛顿力的技术已经在材料科学中得到了很大程度的应用，特别是对于原子力显微镜。在当今的扫描显微镜技术中，有几种常用的方法用于测量亚纳米牛顿力。虽然商用原子力显微镜（AFM）大多使用软硅音叉，但大学团体有大量关于使用石英音叉获得高分辨率AFM图像，测量剪切力或创建新的力传感器的报告。基于石英音叉的力传感器与硅悬臂梁相比具有许多优点，但也存在一些缺点。在这份报告中，石英音叉的基础上的方法进行了描述，其可用性卡西米尔力测量和比较与其他成功的技术。此外，卡西米尔力测量的设计，成立于柏林将被描述和实际的实验方面进行了讨论。一个状态报告的卡西米尔实验在柏林，包括实验装置。为了研究Casimir效应的细节，必须进一步改进装置和活性表面。表面必须更平整、更干净。为了获得更好的分辨率，必须采用弹簧常数较低的杠杆和音叉。
The aim of the measurement series is to study the Casimir force, specifically the effects of different materials and geometries. The art of measuring sub-nano Newton forces has been engineered to a great extent in the material sciences, especially for the atomic force microscope. In today's scanning microscope technologies there are several common methods used to measure sub-nano Newton forces. While the commercial atomic force microscopes ( AFM) mostly work with soft silicon cantilevers, there are a large number of reports from university groups on the use of quartz tuning forks to get high resolution AFM pictures, to measure shear forces or to create new force sensors. The quartz tuning fork based force sensor has a number of advantages over the silicon cantilever, but also has some disadvantages. In this report the method based on quartz tuning forks is described with respect to their usability for Casimir force measurements and compared with other successful techniques. Furthermore, a design for Casimir force measurements that was set up in Berlin will be described and practical experimental aspects will be discussed. A status report on the Casimir experiments in Berlin will be given, including the experimental setup. In order to study the details of the Casimir effect the apparatus and active surfaces have to be improved further. The surfaces have to be flatter and cleaner. For better resolution, cantilevers and tuning forks with a low spring constant have to be employed.