A Lithography-Free Fabrication of Low-Operating Voltage-Driven, Very Large Channel Length Graphene Field-Effect Transistor With NH₃ Sensing Application

1D and 2D Field Effect Transistors in Gas Sensing: A Comprehensive Review

“…CVD was also proposed for the large‐scale fabrication of graphene‐FET gas sensors for the detection of NH 3 , [ 254–257 ] SO 2 , [ 258 ] and NO 2 . [ 240,255,259 ] CVD graphene was grown using high‐temperature hydrocarbon gaseous species in the presence of a thin metallic film; the catalytic activity of the metal enhanced the decomposition of hydrocarbons and facilitated the nucleation of a graphene lattice.…”

“…proposed a CVD‐grown large‐area graphene‐FET for detection of NH 3 at RT. [ 256 ] Graphene was grown by CVD and transferred on a Li 5 AlO 4 /Si substrate, then provided with Ag (60 nm) source and drain contacts achieving a channel length of 450 µm. The as‐fabricated FET featured a p‐type dominant ambipolar behavior with the Dirac point located at ≈1.5 V. Due to the high capacitance density of Li 5 AlO 4 , namely, 318 nFcm −2 , the trans‐characteristic was measured only between −2 and 2 V to display significant information about the I DS behavior near to the Dirac point and, in turn, about the FET operation.…”

“…Experimental setup and device fabrication were further optimized in a next work enabling the detection of NH 3 in a wider range of concentrations, namely, from 10 ppm to 38%. [253] CVD was also proposed for the large-scale fabrication of graphene-FET gas sensors for the detection of NH 3 , [254][255][256][257] SO 2 , [258] and NO 2 . [240,255,259] CVD graphene was grown using high-temperature hydrocarbon gaseous species in the presence of a thin metallic film; the catalytic activity of the metal enhanced the decomposition of hydrocarbons and facilitated the nucleation of a graphene lattice.…”

“…In 2020, Chourasia et al proposed a CVD-grown largearea graphene-FET for detection of NH 3 at RT. [256] Graphene was grown by CVD and transferred on a [240] Copyrigth 2019, American Chemical Society.…”

Investigation of charge carrier dynamics in a Ti3C2Tx MXene for ultrafast photonics applications

“…1 Ever since the isolation of single-layer graphene in 2004, it has become a reference for all 2D materials and has opened the door to finding even more materials. 2,3 Recently, various types of new 2D materials, such as transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), clays, transition metal oxides, etc. , have been discovered.…”