Inorganic semiconductors have the potential features to enhance the stability and performance of printed electronic devices. In this work, we present a microcantilever (μC) printed device by using zinc oxide (ZnO) and silver nanoparticles (AgNP) ink. Two types of devices havebeen fabricated on silicon wafers using two methods: (i) theZnO ink is printed between twoμC printed AgNP electrodes separated within a sub-5μm gap (ii) the ZnO ink havebeen drop-casted between twoμC printed AgNP electrodes. Therefore the first type of devices is a fully printed structure. The measurements of both devices... Continue reading…

Zn 2 TiO 4 thin film is formed on Si/SiO 2 substrate by a spin coating process and Al is used as electrodes. This device has excellent hydrogen (H 2 ) gas sensing properties. The phase and crystal structure of the thin film was studied using X-ray diffraction. The sensor responds linearly at room temperature to H 2 gas concentrations ranging from 50 to 250 ppm and shows a good sensitivity toward low ppm of H 2 . The response time of the sensor is about 76 s at 250-ppm H 2 . We could fit the sensor response to the... Continue reading…

The fabrication and testing of hierarchical architecture based Zinc Ferrite-Zinc oxide (ZnFe 2 O 4 -ZnO) magnetic semiconductor (MS) sensor, for the detection of Hydrogen (H 2 ) down to 50 parts per million (ppm) at room temperature, are reported in this study. The synthesis of ZnFe 2 O 4 -ZnO heterostructure has been carried out using a simple hydrothermal route. The MS sensor shows good sensitivity, quick response, and remarkably good recovery to H 2 at room temperature. A rise in the magnetic movement is verified in ZnFe 2 O 4 -ZnO heterostructure with the interaction of reducing H 2 gas. The sensor exhibits a detection limit of 8.9 ppm with the highest sensitivity of 20% for the detection... Continue reading…

The study demonstrates the fabrication of magnetite (Fe 3 O 4 ) microspheres (MS) based magneto resistor (MR), for the detection of as low as 10 parts per billion (ppb) nitric oxide (NO) at room temperature. The Fe 3 O 4 MS with a diameter of nearly 430 nm, have been synthesized by a solvothermal method. The MR based gas sensor shows excellent sensitivity, fast response, and high recovery to NO at room temperature. Moreover after the interaction with NO, Fe 3 O 4 MS show an enhanced magnetic moment due to the increase in spin value... Continue reading…

This article reports the fabrication of zinc-oxide (ZnO) single-nanowire (SNW)-based backto-back Schottky diodes (BBSDs) using microcantilever printed AgNP contact pads. ZnO SNWs have been placed on a SiO2/Si surface by dropcasting an optimized dispersion of ZnO nanowires (NWs) in deionized (DI) water. The microcantilever-printing process has been used to overlap the surface of the ZnO NW with the AgNP pads. The electrical response of the printed diodes has been verified with an analytical model based on the thermionic emission theory. Printed-Schottky diodes have been fabricated with varying channel lengths of ZnO SNW, and among them, the typical ideality factor of ~2.4, the lowest... Continue reading…

In this work, a resistive sensor based on multiwalled carbon nanotube (MWCNT) - poly(diallyldi- methylammonium chloride) solution (PDDA) composite is proposed for highly sensitive carbon monoxide (CO) detection at room temperature. The surface of MWCNTs is functionalized with PDDA, and the functionalization is investigated by Fourier transform infrared and Raman spectroscopy. The MWCNT-PDDA composite is used as a sensing material with deposited interdigitated electrodes (IDE) of silver (Ag) on glass substrates. The resistance of the sensors changes due to charge... Continue reading…