In Situ Measurement of Adhesion Force between a Single Microparticle and a Surface Using Radiation Pressure of Pulsed Laser Light
In Situ Measurement of Adhesion Force between a Single Microparticle and a Surface Using Radiation Pressure of Pulsed Laser Light
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使用脉冲激光辐射压力原位测量单个微粒与表面之间的粘附力
DOI：
10.1143/jjap.36.l721
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
H. Masuhara
中科院分区：
文献类型：
--
作者：
K. Sasaki;K. Horio;H. Masuhara
提出了一种分析空气中单个微粒与固体表面粘附力的新方法。该方法基于纳秒脉冲激光施加在颗粒上的µ N辐射力，该辐射力将颗粒从透明固体表面拉离，以对抗粘附力。力的强度是根据米氏散射理论确定的，具有辐射压力和粘附力平衡的临界激光强度。这种光学力测量具有无机械接触、适用于微米至纳米尺寸的颗粒以及不会对样品的物理和化学条件造成扰动的优点。在聚合物胶乳和玻璃表面之间的粘附力的分析中清楚地证明了这种方法的高潜力。
A new method is proposed for analyzing the adhesion force between a single microparticle and a solid surface in air. The method is based on the µ N radiation force that is exerted on a particle by nanosecond pulsed laser light, which pulls a particle from a transparent solid surface against the adhesion force. The strength of the force is determined on the basis of the Mie scattering theory with the critical laser intensity at which the radiation pressure and the adhesion force are balanced. This optical force measurement has the advantages of no mechanical contact, of applicability to micro∼nanometer-sized particles and of causing no perturbations on the physical and chemical conditions of a sample. The high potential of this method is clearly demonstrated in the analysis of the adhesion force between polymer latexes and glass surfaces.