Reduced graphene oxide decorated with Fe doped SnO2 nanoparticles for humidity sensor

Compositional engineering of the pi-conjugated small molecular VOPcPhO : Alq3 complex to boost humidity sensing

“…5,6 However, in the current scenario, researchers are struggling to introduce correct material combinations which possess outstanding properties of superior sensitivity and stability, while preserving a low manufacturing cost, a moderately simple processing method, and eco-friendly techniques. 4,[7][8][9] Even though researchers have managed to introduce various simple fabricating processes, which can be coupled with physical and chemical exibility from polymer organic-based materials, mass production of these types of sensing devices seems promising only once their other limitations have been overcome.…”

A solution-processed tin dioxide film applicable as a transparent and flexible humidity sensor

“…1,2 Several studies dedicated to improving the efficacy of SnO 2 -based sensors by the addition of a dopant or control of the surface morphology have been reported and have proved that SnO 2 -based materials could be employed in a wide range of applications including gas, humidity, or biomedical sensors with high performance. [3][4][5][6][7][8] However, owing to the unavoidable requirement of relatively high process temperature for the fabrication of SnO 2 lms and the low heat-resistant temperature of the general polymer substrate (e.g., polyethylene terephthalate, polyethylene naphthalate, polyethersulfone), it is still an insurmountable obstacle to directly prepare a SnO 2 lm on a exible substrate. 9 A simple method for synthesizing SnO 2 lms was provided by Vayssieres and Graetzel in 2004.…”

A Novel Silicon Carbide Nanosheet for High‐Performance Humidity Sensor

“…Both of the two samples show the peak at 3400 cm −1 because of the stretching of the hydroxyl group (OH) or the physical‐absorbed water molecule on the surface. Both peaks at 2892 and 2839 cm −1 of the rGO can be assigned to the CH bond, and the specific peak at 1620 cm −1 is resulted from the CC double bond of the rGO structure . Meanwhile, regardless of the weak intensity, those three peaks mentioned above can all be found from the spectrum of SiC NSs.…”

“…To confirm the best humidity sensing test condition, the dependence of impedance on the RH at different frequency was initially explored, as shown in Figure S4 of the Supporting Information. It can be found directly that the electrical resistivity decreases as the frequency increases, corresponding to the Maxwell–Wagner–Debye relaxation . Furthermore, when the frequency becomes lower, the absolute value of the line slope rises up gradually, which means that the impedance is more sensitive to RH change at low frequency.…”