The rapid response and high sensitivity of a ruthenium-doped copper ferrite thin film (Ru–CuFe₂O₄) sensor

Abstract

A sensor displaying a rapid response and high sensitivity was developed by following a simple route.

The emergence of MnFe2O4 nanosphere-based humidity sensor: a methodical investigation by scanning Kelvin probe and its deployment in multitudinous applications

“…This hysteresis may occur owing to the superhydrophilic nature of MFO. Additionally, in both static and dynamic studies, the sensitivity in the primary region (20–65% RH) was higher than that in the later region, which may be attributed to less proton hopping in the distant layer owing to the less van der Waals force between metal ions and the water layer 49–51 (Fig. S2b, ESI†).…”

“…This chemisorbed layer is not further reformed or affected by extra humidity and is difficult to remove. 49,51 Further increase in water molecules begins to form a physisorbed water layer above the chemisorbed surface. In this layer, conduction occurs owing to protonic (H + ) hoping by applying the Grotthuss chain mechanism (H + + H 2 O -H 2 O + H + ).…”

Humidity Sensor Performance Based ZnO/SnO₂ Nanorods Structure Using Different ZnO Seed Layer

“…This is due to the absorption of water vapour on the surface of thin films. This water vapour can increase current flow through the thin film while lowering resistance[20]. The conductivity of thin films is strongly influenced by water vapour in the air [21]…”