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. 2018 Oct 4;8:14801. doi: 10.1038/s41598-018-32827-y

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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The dual-band sensing of dielectric property of chemicals using the MIM sensor. (a) Measured results when channel A and channel B are filled with ethanol and methanol of 60% concentration, respectively. (b) Corresponding results when samples are exchanged. (c) The dielectric characteristic line of samples, when the frequency, the real and imaginary parts of the complex permittivity are taken as the Z, X and Y axes of the coordinate system, respectively. The reproducibility of signals (d) when using different cleaning methods in channel A (e) or filling different samples in the channel A. (f) The dielectric characteristic line of different types of samples.