VANDERWAALS FORCES BETWEEN OBJECTS COVERED WITH A CHROMIUM LAYER
VANDERWAALS FORCES BETWEEN OBJECTS COVERED WITH A CHROMIUM LAYER
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DOI：
10.1039/f19787402637
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发表时间：
1978-01-01
期刊：
影响因子：
--
通讯作者：
OVERBEEK, JTG
中科院分区：
文献类型：
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作者：
VANBLOKLAND, PHGM;OVERBEEK, JTG
两个金属物体之间的色散力已被测量，从132到670 nm的距离变化。必须采取预防措施，以消除电压电位差引起的静电力。通过测量由测试对象形成的电容来确定金属对象之间的距离。为了比较实验和理论，本文在Lifshitz理论的基础上，对铬物体间的货车范德华力进行了数值计算。结果表明，当铬的介电常数由自由电子气模型描述，并考虑吸收带时，得到与实验非常吻合。此外，还对一些近似的力计算公式的有效性进行了检验。
Dispersion forces between two metal objects have been measured at distances varying from 132 to 670 nm. Precautions had to be taken to eliminate electrostatic forces arising from differences in Volta potential. The distance between the metallic objects was determined by measurring the capacitance formed by the test objects. To compare experiment and theory van der Waals forces between chromium objects have been calculated numerically on the basis of the Lifshitz theory. It is shown that when the dielectric constant of chromium is described by the free electron gas model and when an absorption band is taken into account excellent agreement with experiment is obtained. In addition the validity of a number of approximate equations for calculating the force is tested.