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Issue 14, 2013
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Structure control of ultra-large graphene oxide sheets by the Langmuir–Blodgett method

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Abstract

As a unique type of soft building block, graphene oxide (GO) dispersions are easy to process to produce electronic devices. Developing methods to produce large sized GO with controllable structure is the key for these applications. Here, ultra-large graphene oxide (UL-GO) sheets (up to ∼100 μm in lateral size) were produced in aqueous media and deposited onto substrates with controllable structure, including flat, rippled, standing collapsed, folded, over folded, highly curved, and scrolled morphologies, via the Langmuir–Blodgett (L–B) technique. The MD simulations show that the GO becomes much softer than pristine graphene sheets due to the sp3-hybridization caused by oxygen containing functional groups and this is the reason why a series of distinct structures were observed. To demonstrate the fabrication of a transparent conductor, the close-packed flat UL-GO films on poly(ethylene terephthalate) (PET) were reduced with a low-temperature chemical reduction process in a hydriodic (HI) acid aqueous solution, achieving a sheet resistance as low as 8.1 kΩ/sq with 90% transparency.

Graphical abstract: Structure control of ultra-large graphene oxide sheets by the Langmuir–Blodgett method

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Publication details

The article was received on 02 Oct 2012, accepted on 14 Jan 2013 and first published on 16 Jan 2013


Article type: Paper
DOI: 10.1039/C3RA22367A
Citation: RSC Adv., 2013,3, 4680-4691
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    Structure control of ultra-large graphene oxide sheets by the Langmuir–Blodgett method

    Q. Zheng, L. Shi, P. Ma, Q. Xue, J. Li, Z. Tang and J. Yang, RSC Adv., 2013, 3, 4680
    DOI: 10.1039/C3RA22367A

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