Controlled covalent functionalization of a graphene-channel of a field effect transistor as an ideal platform for (bio)sensing applications

Abstract

The controlled covalent functionalization of the graphene channel of a field effect transistor, based on interdigitated gold electrodes (source and drain), via electrochemical grafting, using specifically designed aryl diazonium species...

The holy grail of pyrene-based surface ligands on the sensitivity of graphene-based field effect transistors

“…1). 36 The Raman spectra recorded after wet-chemical transfer of graphene on different areas of the device underline the homogenous character of the interface (Fig. 2a) with a dominating band at 1580 cm −1 assigned to the G band of graphene sp 2 carbon lattice and contributions at 1350 cm −1 (D band), 2706 cm −1 (2D secondary D band) and ∼2450 cm −1 (lowintensity D + D′′ contribution) due to defects in the graphene sheet introduced during the transfer.…”

Catch and release strategy of matrix metalloprotease aptamers via thiol–disulfide exchange reaction on a graphene based electrochemical sensor

“…The graphene-based electrodes used in this study are interdigitated gold electrode (IDE) arrays of 90 pairs (each with a width of 10 μm, and separated by 10 μm) coated with CVD grown graphene via chemical transfer. 30 Fig. 2a depicts an SEM image of the IDE array, indicating the coverage of all the electrodes with graphene.…”

Highly performing graphene-based field effect transistor for the differentiation between mild-moderate-severe myocardial injury

“…Despite the impressive achievements in the electrical performances of GFETs, the reproducibility of sample preparation and maintaining the high mobility after surface modification represent bottlenecks to overcome [12][13][14]. We have recently demonstrated that CVD graphene-coated interdigitated electrodes functionalized by an ethynylphenyl monolayer via the electrochemical reduction of 4-((triisopropylsilyl)ethynyl)benzene diazonium salt (TIPS-Eth-ArN2 + ) offer an ideal platform for sensing applications where the modified GFET channels hole and electron mobilities reach 1739 ± 376 cm 2 V -1 s -1 and 1698 ± 536 cm 2 V -1 s -1 , respectively [15]. Indeed, while a deeper understanding and analysis of the influence of covalent grafting strategy is required, the creation of a functional monolayer might create a continuous path for electrons to flow in one single plane.…”