Progressive NO₂ Sensors with Rapid Alarm and Persistent Memory‐Type Responses for Wide‐Range Sensing Using Antimony Triselenide Nanoflakes

Abstract

Antimony triselenide (Sb 2 Se 3 ) nanoflake-based nitrogen dioxide (NO 2 ) sensors exhibit a progressive bifunctional gas-sensing performance, with a rapid alarm for hazardous highly concentrated gases, and an advanced memory-type function for low-concentration (<1 ppm) monitoring repeated under potentially fatal exposure. Rectangular and cuboid shaped Sb 2 Se 3 nanoflakes, comprising van der Waals planes with large surface areas and covalent bond planes with small areas, can rapidly detect a wide range of NO 2 gas concentrations from 0.1 to 100 ppm. These Sb 2 Se 3 nanoflakes are found to be suitable for physisorption-based gas sensing owing to their anisotropic quasi-2D crystal structure with extremely enlarged van der Waals planes, where they are humidity-insensitive and consequently exhibit an extremely stable baseline current. The Sb 2 Se 3 nanoflake sensor exhibits a room-temperature/low-voltage operation, which is noticeable owing to its low energy consumption and rapid response even under a NO 2 gas flow of only 1 ppm. As a result, the Sb 2 Se 3 nanoflake sensor is suitable for the development of a rapid alarm system. Furthermore, the persistent gassensing conductivity of the sensor with a slow decaying current can enable the development of a progressive memory-type sensor that retains the previous signal under irregular gas injection at low concentrations.

Unlocking superior NO2 sensitivity and selectivity: the role of sulfur abstraction in indium sulfide (InS) nanosheet-based sensors

“…To assess the NO 2 sensing performance, we conducted a comparative analysis of InS (Table S1, ESI†) with respect to various sensors utilizing 2D semiconductors (SnS 2 , 55 Sb 2 Se 3 , 56 N-doped In 2 S 3 , 57 black phosphorus, 58 and reduced graphene oxide 59 ), graphitic carbon nitride, 60 metal oxides (In 2 O 3 nanoparticles, 61,62 and SnO 2 nanowires 63 ), and diverse heterostructures (SnO 2 /SnSe 1.7 , 64 In 2 O 3 /SnS 2 , 65 SnO 2 /SnS 2 , 66 SnSe 2 /SnO/SnSe, 67 and In 2 O 3 nanoparticles/SnO 2 nanowires 63 ). The evaluation revealed that InS outperforms state-of-the-art materials, exhibiting a superior sensing response and lower LOD than all the aforementioned systems.…”

Solution-processed In2Se3 nanosheets for ultrasensitive and highly selective NO2 gas sensors

“…To evaluate the performance for NO 2 sensing, we compared α-In 2 Se 3 with other sensors based on 2D semiconductors (SnS 2 , 65 Sb 2 Se 3 , 66 N-doped In 2 S 3 , 67 black phosphorus, 68 reduced graphene oxide 69 ), graphitic carbon nitride, 70 metal oxides (In 2 O 3 nanoparticles, 71,72 SnO 2 nanowires 73 ), and various heterostructures (SnO 2 /SnSe 1.7 , 74 In 2 O 3 /SnS 2 , 75 SnO 2 /SnS 2 , 76 SnSe 2 /SnO/SnSe, 77 In 2 O 3 nanoparticles/SnO 2 nanowires 73 ). The comparative analysis highlights the superior suitability of α-In 2 Se 3 compared to state-of-the-art materials, with significantly higher sensing response and lower LOD than all other above-mentioned systems.…”

High NO2 gas sensing performance of tin-dichalcogenides at room temperature via high-energy mechanical milling synthesis

“…The values found for https://doi.org/10.26434/chemrxiv-2024-np6zg ORCID: https://orcid.org/0000-0001-7971-5567 Content not peer-reviewed by ChemRxiv. License: CC BY 4.0 𝐿𝐷𝐿 are below those reported in recent studies, and also far below the level which is considered harmful to human health [18,30,[44][45][46][47][48]. The reactivity derived from both chalcogenide elements, as well as the exposure of surface defective edges by exfoliation are considered factors that can influence the sensitivity of NO2 sensor devices.…”