Current-induced cleaning of graphene

By J. Moser, A. Barreiro, A. Bachtold. 2007

672 citations recorded by the source corpus.

A simple yet highly reproducible method to suppress contamination of graphene at low temperature inside the cryostat is presented. The method consists of applying a current of several milliamperes through the graphene device, which is here typically a few microns wide. This ultrahigh current density is shown to remove contamination adsorbed on the surface. This method is well suited for quantum electron transport studies of undoped graphene devices, and its utility is demonstrated here by measuring the anomalous quantum Hall effect.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry, Physical and Theoretical Chemistry

View Paper: https://www.semanticscholar.org/paper/4e19ec0a55b8426576c9b548a7abaabfa19af659

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

In Physical and Theoretical Chemistry

Citations in the corpus

Progress, challenges, and opportunities in two-dimensional materials beyond graphene. (2013, background): “by functionalization of graphenewith hydrogen, oxygen, hydroxyl groups, or carboxylic groups.(208) However, adsorbed molecules have been found to have an extremely high mobility and low adhesion in ambient atmosphere,(209) which makes reliable device fabrication challenging.”
A review on the mechanical and thermal properties of graphene and graphene-based polymer nanocomposites: understanding of modelling and MD simulation (2020, background): “7%), electrical conductivity with a current density of 108 A/cm(2), and it is also capable of carrying one million times higher densities of electrical current than copper [5].”
High-throughput solution processing of large-scale graphene. (2009, background): “Moreover, this lithographic process can degrade device performance by introducing contaminants if the photoresist is not entirely remove”
Synthesis and Fabrication of Graphene and Graphene Oxide: A Review (2019, background): “7%), good electrical conductivity, and ability to withstand current density of 108 A/cm(2) [12].”
Electronic transport in two-dimensional graphene (2010, background): “Quite surprisingly, the suspended samples as prepared did not show much difference from unsuspended graphene, until after current annealing (Moser et al., 2007; Barreiro et al., 2009).”
Synthesis of graphene (2016, background): “%) and good electrical conductivity merit attention as well as ability to with stand current density of 108 A/cm2 [5], for applications such as for transparent conductive electrodes [6, 7] among many other potential applications.”
The influence of thermal annealing to remove polymeric residue on the electronic doping and morphological characteristics of graphene (2013, background): “remove polymeric contaminants [19,20], but can only be performed after electrode fabrication on the graphene.”
Production and processing of graphene and related materials (2020, methodology): “High currents (~mA per μm width) can be used to anneal SLG to clean up impurities [1388, 1389] or to produce narrow constrictions tens of nm wide in suspended SLG [1390].”