Application of Near-Field Scanning Microwave Microscopy in Liquid Environment

In this article, a method of illustrating the electromagnetic properties of liquid specimens is proposed by our homemade near-field scanning microwave microscopy (NSMM). By introducing the fundamental theorem of NSMM and conducting a simulation on the configuration of the whole system, parameters including quality factor and resonant frequency in electrolyte liquid specimen vary with types of the solution as well as their concentration. By conducting the line scanning testing method, the relation of concentration of a specified solution concerning its corresponding electromagnetic properties is clarified. Eventually, yeast cells are tested at living or dead status with point scanning and line scanning separately. The NSMM experiment results exhibit a substantial capacity for biologic samples in a liquid environment.