原子力显微镜测量双光子成型点的弹性模量  

Measuring and analyzing elastic modulus of single voxels by femo-second two-photon photopolymerization

作　　者：苏亚辉[1] 陈宇航[1] 董磊[2] 郑志军[3] 郭锐[1] 肖诗洲[1] 黄文浩[1] 

机构地区：[1]中国科学技术大学精密机械与精密仪器系,安徽合肥230026 [2]中国科学技术大学纳米结构与物理研究室,安徽合肥230022 [3]中国科学技术大学材料力学行为和材料设计研究实验室,安徽合肥230026

出　　处：《光学精密工程》2006年第4期667-672,共6页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.50275140);国家自然科学基金资助项目(No.50335050)

摘　　要：提出了一种飞秒激光双光子成型点弹性模量的测量及结果分析方法。借助于原子力显微镜,选用无针尖探针对成型点的力学性能进行了测试,建立了椭球-平面接触的弹性力学模型。考虑了成型点剩余部分形变对结果分析的影响,在标定微探针弹性系数和对粘附力进行分析的基础上,提取了力曲线中所包含的力学信息,推算出了成型点的弹性模量,得到了成型点的弹性模量低于宏观材料弹性模量的结论。An elastic modulus of single voxel was measured and analyzed to measure physical properties of materials. A tipless cantilever was used to measure the elastic modulus of the single voxel with the ellipsoid shape. Then allowing for the effect of deformation of the rest part on the result analysis, the contact model of elastic sphere on a flat surface was developed. In the base of calibrating the elastic constant of cantilever and analysis adhesion force, the force information from force curve was obtained and the elastic modulus of single voxel was calculated. At last,It is concladed that the elastic modulus of volex is generally lower than that of SCR500.

关 键 词：原子力显微镜 成型点 弹性模量 无针尖探针 力学模型 

分 类 号：O343[理学—固体力学] TH742.9[理学—力学]