Gas sensing devices based on two-dimensional materials: a review

Abstract

Gas sensors have been widely utilized penetrating every aspect of our daily lives, such as medical industry, environmental safety testing, and the food industry. In recent years, two-dimensional (2D) materials have shown promising potential and prominent advantages in gas sensing technology, due to their unique physical and chemical properties. In addition, the ultra-high surface-to-volume ratio and surface activity of the 2D materials with atomic-level thickness enables enhanced absorption and sensitivity. Till now, different gas sensing techniques have been developed to further boost the performance of 2D materials-based gas sensors, such as various surface functionalization and Van der Waals heterojunction formation. In this article, a comprehensive review of advanced gas sensing devices is provided based on 2D materials, focusing on two sensing principles of charge-exchange and surface oxygen ion adsorption. Six types of typical gas sensor devices based on 2D materials are introduced with discussion of latest research progress and future perspectives.

Application of Two-Dimensional Materials towards CMOS-Integrated Gas Sensors

“…FET-based sensors can also be designed using a tunnel FET structure or a nanowire channel in order to provide more control over the conduction in the channel. Furthermore, semiconductor films have also been applied in designing inductive and optical gas sensors, as was mentioned in Section 2.5.1 ; nevertheless, when 2D materials are discussed in terms of gas sensing, it is the chemiresistive and TFT FET devices which are of primary interest [ 114 , 121 ].…”

“…From the different types of FET-based gas sensing structures, the TFT is one which appears to be most promising and has been tested most extensively using 2D semiconductor materials [ 114 , 121 ]. The reason is that it is relatively easy to fabricate test devices, and the sensitive 2D film is the one which is directly exposed to the gas and acts as a FET channel layer.…”

“…TMDs including MoS 2 , MoTe 2 , WSe 2 , and SnS 2 have already been widely studied for gas sensing in the FET configuration, primarily for the detection of nitrogen-containing compounds. In the chemiresistor configuration, a broader group of 2D materials have shown high potential for gas sensor development, including TMDs, boron nitride, black phosphorus, and MXenes [ 1 , 121 ]. The recent review of these materials by Wang et al [ 121 ] goes into some detail discussing the potential of these films for gas sensing.…”

“…In the chemiresistor configuration, a broader group of 2D materials have shown high potential for gas sensor development, including TMDs, boron nitride, black phosphorus, and MXenes [ 1 , 121 ]. The recent review of these materials by Wang et al [ 121 ] goes into some detail discussing the potential of these films for gas sensing. However, they do not discuss the means or potential for their integration with CMOS fabrication or electronics, which is the main basis for this review.…”

Assembly of bimetallic (Au–Ag)FON composite films at liquid/solid interfaces and their tunable optical properties

“…45 They can be applied in the field of electronic/optoelectronic devices, 46 catalysis 47,48 and sensing. 49,50 2D structural colloidal monolayers based on colloid self-assembly technology have attracted the attention of researchers because of their characteristics of uniform surface, large specific surface and easy to be prepared in large-scale. 51,52 When the light beam passes through the surface of colloid crystal, its ordered sub-wavelength periodic structure will cause typical Bragg diffraction, resulting in specific structure color and photonic band gap.…”