Electric Property Evolution of Structurally Defected Multilayer Graphene

Abstract

We report on the influence of structural disorder on the electrical properties of multilayer graphene (MLG). Exponential decreases in the conductance and transconductance with increase of defects in the MLG were observed, which could be explained by the percolation and the variable range hopping conduction. An enhancement of p-type nature with increasing disorders was considered to be the result of oxygen doping in the graphene sheets introduced by oxygen plasma. The rapid increase of low-frequency noise was attributed to the formation of conductive network through the continuum percolation, as the low-frequency noise could be increased by the enhanced carrier scattering at the defect sites. We hope that our result should suggest a simple method of tuning the electrical properties of graphene.

Variability Effects in Graphene: Challenges and Opportunities for Device Engineering and Applications

“…Artificially generated structural defects (e.g. ion irradiation) have been found to lower the mobility, shift the Dirac point, increase the noise and modify the transport properties [69,[169][170][171]. However, the quality of CVD-graphene has been significantly improved in recent years [17,23,172].…”

“…adjusting the process flow or device structure), one topic that is being heavily investigated [12,60,63,64,[66][67][68][69][70]. From the metrology perspective, on the other hand, we demonstrate that variabilities in graphene can function as novel probing mechanisms [58,65,[71][72][73][74][75], where the 'signal fluctuations' can be useful for potential sensing applications.…”

Thermal and mechanical improvement of aluminum open-cells foams through electrodeposition of copper and graphene

“…As the basic structure of all graphitic forms, graphene is a building block for carbon materials of all other dimensionalities, such as 0D fullerene, 1D nanotube, and 3D graphite. Because of its properties such as large specific surface area [20], high thermal and electrical conductivities [21], great mechanical strength [22], graphene has attracted a growing interest, founding potential applications in many fields such as nanocomposites [23], batteries [24], supercapacitors [25], nanoelectronics [26] and sensors [27], etc. These peculiar properties make graphene an excellent additive to dramatically enhance the mechanical, electrical and thermal properties of compounds [28].…”

Sensitive determination of metronidazole based on Graphene-TiO2 modified glassy carbon electrode in human serum and urine samples

“…Recently graphene (GR), which consists of two-dimensional sheets of sp 2 hybridized carbon atoms, has attracted enormous attention from scientists. Because of its large surface area, excellent thermal and electrical conductivity, high mobility of charge carriers, high mechanical strength and elasticity, GR is used as an excellent electrode modifier [7][8][9]. On the other hand nanocrystalline TiO2 films and membranes have good structural and catalytic properties, such as high surface area and good biocompatibility [10][11][12].…”