Local anodic oxidation kinetics of chemical vapor deposition graphene supported on a thin oxide buffered silicon template

Chuang, Min-Chiang; Chien, Hsiao-Mei; Chain, Yuan-Hong; Chi, Gou–Chung; Lee, Sheng‐Wei; Woon, Wei Yen

doi:10.1016/j.carbon.2012.11.045

Cited by 18 publications

(24 citation statements)

References 32 publications

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“…We suggest that in the first stage the height increase was mainly induced by the conversion of graphene into graphene oxide and then the oxidation of Si occurred during the second and third stages. This conclusion is consistent with the reports of Chuang and co‐workers . Moreover, for the first stage of OTS‐RGO oxidation, the value of the height increase (≈0.5 nm) is consistent with the height increase expected from graphene to graphene oxide …”

Section: Resultssupporting

confidence: 92%

Site‐Specific Chemical Surface Functionalization and Electronic Patterning of Graphene by Electrooxidative Lithography

Hoeppener

Schubert

2016

ChemPhysChem

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The combination of different properties being manipulated on nanomaterials is one of the challenges in nanotechnology research. In particular, the possibility to tailor the electronic and chemical properties offers promising possibilities for the design of functional nanostructures. Herein, we report an approach that permits control of these properties on the basis of electrooxidative lithography to structure reduced graphene oxide functionalized with a self-assembled monolayer of n-octadecyltrichlorosilane. The electrochemical oxidation process first induces the formation of polar acid groups on the monolayer, which can be used to covalently bind nanoparticles and molecules and, secondly, also allows the reoxidation of the underlying reduced graphene oxide. As such, the chemical signature as well as the electronic properties of the substrate can be tailored on the micro- and nanometer scale. Details on the oxidation of the monolayer as well as thorough characterization of the electronic properties will be presented. Finally, the approach is used to demonstrate the fabrication of a sensitive glucose sensor device.

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Section: Resultssupporting

confidence: 92%

Site‐Specific Chemical Surface Functionalization and Electronic Patterning of Graphene by Electrooxidative Lithography

Hoeppener

Schubert

2016

ChemPhysChem

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“…The role of molecular oxygen in this kind of processes is very significant, in fact, it is able to shift the Fermi level up to about 0.5 eV and give a p‐type doping up to 10 13 cm −2 . These properties have been started to be exploited to selectively oxidize Gr in view of nanodevices realization . In particular, by opportune thermal treatments in controlled atmosphere it has been shown that Gr and also other 2D materials of interest can be doped, but some drawbacks arising from the environment can come including stress effects .…”

Section: Introductionmentioning

confidence: 99%

Graphene‐SiO₂ Interaction from Composites to Doping

Armano

Buscarino

Cannas

et al. 2019

Physica Status Solidi (a)

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An overview of the interaction between monolayer graphene and SiO2 dielectric substrate is reported focusing on the effect this latter has on doping and strain induced by thermal treatments in controlled atmosphere. The disentanglement of strain and doping is highlighted and the comparison with another dielectric substrate of Al2O3 evidences the critical role that the substrate has in the electronic properties of graphene. The reported results pave the way for microelectronic devices based on graphene on dielectrics and for Fermi level tuning in composites of graphene and nanoparticles.

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“…But for longer exposure times (up to s), a lateral expansion of a very thin oxide layer is actually evidenced, which progress unavoidably, spoiling the aspect ratio of the features . In fact, it will be confirmed later that the disc‐shaped oxidized region in graphene expands much more than expected according to the estimated dimensions of the water meniscus around the tip …”

Section: Introductionmentioning

confidence: 82%

New Concepts for Production of Scalable Single Layer Oxidized Regions by Local Anodic Oxidation of Graphene

Quesada

Borrás

García-Vélez

et al. 2019

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A deep comprehension of the local anodic oxidation process in 2D materials is achieved thanks to an extensive experimental and theoretical study of this phenomenon in graphene. This requires to arrange a novel instrumental device capable to generate separated regions of monolayer graphene oxide (GO) over graphene, with any desired size, from micrometers to unprecedented mm2, in minutes, a milestone in GO monolayer production. GO regions are manufactured by overlapping lots of individual oxide spots of thousands µm2 area. The high reproducibility and circular size of the spots allows not only an exhaustive experimental characterization inside, but also establishing an original model for oxide expansion which, from classical first principles, overcomes the traditional paradigm of the water bridge, and is applicable to any 2D‐material. This tool predicts the oxidation behavior with voltage and exposure time, as well as the expected electrical current along the process. The hitherto unreported transient current is measured during oxidation, gaining insight on its components, electrochemical and transport. Just combining electrical measurements and optical imaging estimating carrier mobility and degree of oxidation is possible. X‐ray photoelectron spectroscopy reveals a graphene oxidation about 30%, somewhat lower to that obtained by Hummers' method.

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Local anodic oxidation kinetics of chemical vapor deposition graphene supported on a thin oxide buffered silicon template

Cited by 18 publications

References 32 publications

Site‐Specific Chemical Surface Functionalization and Electronic Patterning of Graphene by Electrooxidative Lithography

Site‐Specific Chemical Surface Functionalization and Electronic Patterning of Graphene by Electrooxidative Lithography

Graphene‐SiO₂ Interaction from Composites to Doping

New Concepts for Production of Scalable Single Layer Oxidized Regions by Local Anodic Oxidation of Graphene

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Local anodic oxidation kinetics of chemical vapor deposition graphene supported on a thin oxide buffered silicon template

Cited by 18 publications

References 32 publications

Site‐Specific Chemical Surface Functionalization and Electronic Patterning of Graphene by Electrooxidative Lithography

Site‐Specific Chemical Surface Functionalization and Electronic Patterning of Graphene by Electrooxidative Lithography

Graphene‐SiO2 Interaction from Composites to Doping

New Concepts for Production of Scalable Single Layer Oxidized Regions by Local Anodic Oxidation of Graphene

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Graphene‐SiO₂ Interaction from Composites to Doping