Highly Sensitive and Fast Responsive Humidity Sensor based on 2D PtSe₂ with Gamma Radiation Tolerance

Abstract

2D transition‐metal dichalcogenides (TMDs) with their unique properties have accelerated the study of emerging sensors and nanoelectronics to embed in various industries including severe environments such as nuclear power plant, low Earth orbit, and space. Therefore, a systematic investigation of the sensing properties and ionizing radiation effect on 2D TMDs is required. This study reveals a facile humidity sensor based on 2D platinum diselenide (PtSe2), and the effect of a high dose of gamma (γ‐ray) radiation on their physical and electrical properties. The proposed humidity sensor exhibits notable variation of current signal up to 105 orders under the relative humidity (RH) range of 20–85% and a fast response time of 60 ms. The real‐time electrical output of the PtSe2 during irradiation by 10 kGy of γ‐rays (60Co), followed by material characterization confirms their unique stability under gamma radiation. Furthermore, precise and fast detection of moisture by the proposed PtSe2‐based humidity sensor is demonstrated as a potential leak locator application.

Wafer-Level, High-Performance, Flexible Sensors Based on Organic Nanoforests for Human–Machine Interactions

“…As shown in Figure a, there is an abrupt change in the sensitivity curve of the sensor at 60% RH; this can be ascribed to the reach of the critical humidity condition. At this critical condition, the way the water molecules are absorbed changes from chemisorption to physisorption. − Especially when RH is below the critical condition, the number of water molecules is not large enough to form a continuous layer, whereas beyond the critical point, excess water molecules tend to form more layers on the sensing material. , In such a condition, the transfer of condensed water to the positions of electrodes becomes possible. Consequently, we obtained linear relationships between the capacitance and RH, one for each humidity range.…”

Self-Powered Humidity Sensors Based on SnS2 Nanosheets

“…In this work, we are working at room temperature without applying any catalyst, so the response and recovery times are mostly influenced by the extreme surface area of the vertical SnS 2 . Mondal et al introduced a 2D platinum diselenide (PtSe 2 ) humidity sensor in which its physical and electrical properties were investigated at a high dose of gamma (γ-ray) radiation . The projected humidity sensor displays current at 10 5 orders under a RH range of 20–85% with a considerably fast response time of 60 ms through the irradiation by 10 kGy of γ-rays (60Co).…”

“…Mondal et al introduced a 2D platinum diselenide (PtSe 2 ) humidity sensor in which its physical and electrical properties were investigated at a high dose of gamma (γ-ray) radiation. 44 The projected humidity sensor displays current at 10 5 orders under a RH range of 20−85% with a considerably fast response time of 60 ms through the irradiation by 10 kGy of γ-rays (60Co). As can be seen here, achieving a fast response time is only possible under gamma radiation.…”

On the Rational Design of Mesoporous Silica Humidity Sensors

“…Sensing the relative humidity is a key feature in applications where moisture variation has either an effect on the desired performance (agriculture [1,2], food processing [3], electronics [4], corrosion [5]), or where the user comfort benefits from humidity control (automotive [6], aviation [7], smart home [8], healthcare [9], and space vehicles industries [10]). Humidity sensors with wide detection range, high sensitivity and selectivity, small hysteresis, rapid response and recovery times, coupled with low fabrication cost, are the focus of research nowadays [11].…”