Enhancement of the Electrical Properties of Graphene Grown by Chemical Vapor Deposition via Controlling the Effects of Polymer Residue

Suk, Ji Won; Lee, Wi Hyoung; Lee, Jong-Ho; Chou, Harry; Piner, Richard D.; Hao, Yufeng; Akinwande, Deji; Ruoff, Rodney S.

doi:10.1021/nl304420b

Cited by 338 publications

(359 citation statements)

References 46 publications

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“…Their results indicated that the outstanding transport properties of graphene were indeed accessible on soft substrates, though large-area synthesized sheets are required for practical applications. Since then, synthesized graphene TFTs and circuits have made remarkable progress, featuring state-of-the-art TFT mobilities of B8,000 cm 2 V À 1 s À 1 , enabled by advancements in: (i) large-area chemical vapour deposited synthesis 52 , (ii) post-synthesis transfer 53 and (iii) transistor device structure 32,38,54 . Readers interested in graphene synthesis will find the 2010 review article by Chhowalla and coworkers 55 an excellent resource.…”

Section: Contemporary Flexible Performancementioning

confidence: 99%

Two-dimensional flexible nanoelectronics

2014

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represents the tenth anniversary of modern graphene research. Over this decade, graphene has proven to be attractive for thin-film transistors owing to its remarkable electronic, optical, mechanical and thermal properties. Even its major drawback-zero bandgap-has resulted in something positive: a resurgence of interest in two-dimensional semiconductors, such as dichalcogenides and buckled nanomaterials with sizeable bandgaps. With the discovery of hexagonal boron nitride as an ideal dielectric, the materials are now in place to advance integrated flexible nanoelectronics, which uniquely take advantage of the unmatched portfolio of properties of two-dimensional crystals, beyond the capability of conventional thin films for ubiquitous flexible systems.T wo-dimensional (2D) atomic sheets are atomically thin, layered crystalline solids with the defining characteristics of intralayer covalent bonding and interlayer van der Waals bonding 1-3 . The expanding portfolio of atomic sheets illustrated in Fig. 1a currently include the archetypical 2D crystal graphene 3-14 , transition metal dichalcogenides (TMDs) 1,2,15-21 , diatomic hexagonal boron nitride (h-BN) 3,[22][23][24][25] , and emerging monoatomic buckled crystals collectively termed Xenes, which include silicene 2,26,27 , germanene 2 and phosphorene [28][29][30][31] . These materials are considered 2D because they represent the thinnest unsupported crystalline solids that can be realized, possess no dangling surface bonds and show superior intralayer (versus interlayer) transport of fundamental excitations (charge, heat, spin and light). The portfolio is expected to grow as more elemental and compound sheets are uncovered.The outstanding properties of 2D crystals have generated immense interest for both conventional semiconductor technology and the nascent flexible nanotechnology because, amongst other considerations, these atomic sheets afford the ultimate thickness scalability desired in a variety of essential material categories, including semiconductors, insulators, transparent conductors and transducers 3,16,18 . In particular, flexible nanoelectronics stand to greatly benefit from the development of 2D crystals because their unmatched combination of device physics and device mechanics is accessible on soft polymeric or plastic substrates 17,18,32,33 , which can enable the long sought after large-area high-performance flexible devices that can be manufactured at economically viable scales. As a result, existing flexible technology is expected to be transformed from low-cost commodity applications, such as radio-frequency identification tags and sensors, to integrated nanosystems with electronic performance comparable to silicon devices, in addition to affording mechanical flexibility and manufacturing form-factor beyond the capability of conventional semiconductor technology 34 . Hence, a new era in integrated flexible technology founded on 2D crystals is emerging.

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Section: Contemporary Flexible Performancementioning

confidence: 99%

Two-dimensional flexible nanoelectronics

2014

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“…103 Polymer residues after fabrication processes affect the electrical and thermal properties of graphene. Plasma treatment can also be used as post process cleaning step for CVD grown graphene.…”

Section: Nitrogen Functionalizationmentioning

confidence: 99%

Plasma engineering of graphene

Dey

Chroneos

Braithwaite

et al. 2016

Applied Physics Reviews

137

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Recently, there have been enormous efforts to tailor the properties of graphene.These improved properties extend the prospect of graphene for a broad range of applications. Plasmas find applications in various fields including materials science and have been emerging in the field of nanotechnology. This review focuses on different plasma functionalization processes of graphene and its oxide counterpart. The review aims at the advantages of plasma functionalization over the conventional doping techniques. Selectivity and controllability of the plasma techniques opens up future pathways for large scale, rapid functionalization of graphene for advanced applications. We also emphasize on atmospheric pressure plasma jet as the future prospect of plasma based functionalization processes.

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“…[13][14][15] The residue can alter the contact resistance as well as the electrical characteristics of the channel material. 14,16 Furthermore, the adhesion of a metal contact on the inert surface of a carbon nanotube is generally poor. 17 The contact can therefore delaminate during lift-off, and this undesired effect can significantly lower the device yield.…”

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confidence: 99%