Doping Single‐Layer Graphene with Aromatic Molecules

The extended growth of graphene oxide flakes using ethanol CVD

“…23 Figure S3 shows this 30 deconvoluted 2D 1 and 2D 2 bands of HOPG. It is noted that in our ethanol CVD treated chips, both new growth and pre-existing GO flakes, do not show the 2D 1 and 2D 2 bands typical of HOPG, thus suggesting the thickness of the layers must be less than 5 layers, which we confirm with the Atomic Force Microscopy (AFM) 35 later in this manuscript. Raman spectroscopy can distinguish the number of layers of carbon.…”

“…9 After reduction, the increased pockets of sp 2 hybridised carbon structure provides its mechanical strength and electrical conductivity. 7 Despite these advantages and a substantial progress in RGO research over the years, we are still not able to produce RGO on 35 substrates with good homogeneity and conductivity for practical applications. 10 This is due to the incomplete, poor coverage and different sizes of RGO flakes on substrates; posing a challenge to working with RGO fabrication.…”

“…In the TEM image, the lighter contrast of the newly grown RGO is highlighted in yellow. The contrast difference is due to the difference in number of layers between the pre-existing 35 RGO flake and newly grown RGO. It is observed that the new growth ends with circular edges, similar to observations in the high-magnification SEM image.…”

“…26 Thus, ethanol CVD method increased the average size of sp 2 domains on existing GO flakes. Using the Tuinstra-Koenig 27 empirical 35 method, the lateral domain size of the sp 2 graphitic ring cluster on the GO flake after 2 hours of Ethanol CVD treatment is calculated to be ~4.8nm. The treatment by ethanol CVD could increase the spatial dimension of the sp 2 region of existing RGO flake thus resulting in an increase in conductivity.…”

Sensing at the Surface of Graphene Field‐Effect Transistors

“…[12] The broad sensing potential of graphene can only be unlocked by the introduction of sensitizer (bio)molecules and structures, e.g. various inorganic groups, [23][24][25][81][82][83][84][85][86][87][88][89][90] organic or organometallic molecules, [37,[91][92][93][94][95][96] DNAs, [97][98][99][100][101] proteins, [102] peptides, [30,31,103,104] nanoparticles, [105,106,107] and 2D heterostructure. [51,52,61,108] These molecules are able to respond chemically or physically to their nearby environment, whose responses could then be transduced into an appreciable change in the conductivity of the carbon-based honeycomb scaffold.…”