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. 2018 Apr 3;18(4):1075. doi: 10.3390/s18041075

Figure 2.

Figure 2

(a) Measurement setup including the device-under-test (DUT), test samples, a micropipette for depositing the samples, connection probes, and a network analyzer for examining the performance of the device under varied concentrations of water-ethanol solution. (b) Enlarged view of the DUT. (c) Microscopic image of the fabricated sensor, which was connected to the planar circuit board through wire bonding.