二维纳米材料磁性探测的双臂微悬臂梁设计  

Design of double-arm micro-cantilever beam of two-dimensional nanomaterial magnetic detection

作　　者：种波 陈博杨 陈长城 田东平 Chong Bo;Chen Boyang;Chen Changcheng;Tian Dongping(School of Science,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学理学院,陕西西安710055

出　　处：《红外与激光工程》2022年第4期321-325,共5页Infrared and Laser Engineering

基　　金：西安市科技计划高校人才服务企业项目(2019217414GXRC010CG011-GXYD10.2)。

摘　　要：磁共振弱力探测技术能够对物质实现非破坏性的高精度结构信息探测,在物理、生物、医学等领域有着非常重要的应用。该技术中,超灵敏悬臂梁是实现弱力探测的核心组成之一。近年来,二维纳米材料由于其奇特的物理特性得到了越来越多的关注。为实现对二维纳米材料磁性的探测,基于单臂微悬臂梁模型,利用差动放大的方法,提出了双臂微悬臂梁的设计,并分析了双臂微悬臂梁中上下球形磁探针内外部的磁场分布,最后以单晶硅悬臂梁和钐钴合金磁球探针为例,对该悬臂梁进行数值模拟,发现该方案能够显著提高悬臂梁的探测灵敏度。Magnetic resonance weak force microscopy(MRWFM)can achieve non-destructive high-precision structural information detection of substances.This advantage makes MRWFM be widely applied in fields of physics,biology,medicine,and so on.The super-sensitive cantilever beam is one of core composition to realize weak force detection in this technology.In recent years,two-dimensional nanomaterials have attracted more and more attention due to their unique physical properties.In order to achieve the detection of the magnetism of twodimensional nanomaterials,the design of double-arm micro-cantilever beams with differential amplification based on single arm micro-cantilever beam model was proposed.Then the magnetic field distributions inside and outside of the scan balls fastened on the double-arm micro-cantilever beams were analyzed.Finally,the numerical simulation of the cantilever beam was completed,taking the single-crystal silicon cantilever beams and CoSm magnetic ball probe as examples.It is found that the scheme can improve detection sensitivity of cantilever beam significantly.

关 键 词：磁共振技术 弱力探测 悬臂梁 灵敏度 

分 类 号：O4-34[理学—物理]