Electrical characterization of interdigitated humidity sensors based on CNT modified calixarene molecules
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In this study, we report on the optimization and characterization of chloroform soluble calixarene derivative as a humidity sensor based on electrical properties. Due to the fact that calixarene molecules are nonconductive, we modified the calixarene molecules with carbon nanotubes with electrostatic bond in order to increase the conductance of calixarene molecule (5,11,17,23-tetra-ter-butyl-25,27-dehydrazinamidcarbonilmetoxy-26,28- -dehydroxy-kalixaren). Using photolithography technique, we fabricated interdigitated gold electrodes with 3 micrometers separation to investigate the electrical properties of carbon nanotubes modified calixarene molecule where we used dropcast method to form a thin film of carbon nanotubes modified calixarene molecule on the gold electrodes. Our reproducible experimental results indicated that the chloroform soluble carbon nanotubes modified calixarene films have great potential for humidity sensing applications at room temperature operations.