InN Based Water Condensation Sensors on Glass and Flexible Plastic Substrates

Abstract

In this paper, we report the realization and characterization of a condensation sensor based on indium nitride (InN) layers deposited by magnetron sputtering on glass and flexible plastic substrates, having fast response and using potentially low cost fabrication technology. The InN devices work as open gate thin film sensitive transistors. Condensed water droplets, formed on the open gate region of the sensors, deplete the electron accumulation layer on the surface of InN film, thus decreasing the current of the sensor. The current increases back to its initial value when water droplets evaporate from the exposed InN film surface. The response time is as low as 2 s.

Structural and Optical Properties of InN Nanowires Formed on Si(111)

“…The full width at half maximum (FWHM) values of the peaks for the (0002) crystal plane of InN were measured as 0.18, 0.16, 0.17, and 0.19 ∘ for the NW1, NW2, NW3, and NW4 samples, respectively. All FWHM values of InN NWs were significantly narrower than those (~0.46 ∘ ) in pre- viously reported results [27,28]. This result indicates that InN NWs formed on Si(111) have high crystallinity.…”

Piezoelectric Smart Patch Operated with Machine-Learning Algorithms for Effective Detection and Elimination of Condensation

“…Consequently, timely detection and elimination of condensation are of great importance for many applications. Most of the currently reported condensation detectors measure the capacitance changes caused by the changes of dielectrics (e.g., formation of dew) to determine whether condensation occurs. − However, these detectors are susceptible to the variations of electrical characteristics of liquids and ambient humidity and also show strong nonlinearity. In this paper, we propose a flexible Lamb wave device to monitor the dissipation of acoustic energy during condensation, and it can effectively not only detect but also prevent or remove the surface condensation.…”