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Microwave measurements combined with scanning probe microscopy is a novel tool to explore high-localized mechanical and electrical properties of biological species. Complex permittivities and permeabilities are detected through slight variations of an incident microwave signal. Here we report the high-frequency dependence of the electromagnetic dynamic characteristics in human monocytic leukemia cells...
We describe a method to measure capacitances and dopant densities with a nanometer scale spatial resolution. It is implemented using an atomic force microscope with a conductive tip interfaced with a microwave vector network analyzer. A microwave signal is sent to the tip and the ratio of reflected and incident wave is measured. The technique - also referred to as scanning microwave microscopy (SMM)...
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