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Issue 46, 2015
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Tip-based nanofabrication of arbitrary shapes of graphene nanoribbons for device applications

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Abstract

Graphene nanoribbons (GNRs) have promising applications in future nanoelectronics, chemical sensing and electrical interconnects. Although there are quite a few GNR nanofabrication methods reported, a rapid and low-cost fabrication method that is capable of fabricating arbitrary shapes of GNRs with good-quality is still in demand for using GNRs for device applications. In this paper, we present a tip-based nanofabrication method capable of fabricating arbitrary shapes of GNRs. A heated atomic force microscope (AFM) tip deposits polymer nanowires atop a CVD-grown graphene surface. The polymer nanowires serve as an etch mask to define GNRs through one step of oxygen plasma etching similar to a photoresist in conventional photolithography. Various shapes of GNRs with either linear or curvilinear features are demonstrated. The width of the GNR is around 270 nm and is determined by the width of the deposited polymer nanowire, which we estimate can be scaled down to 15 nm. We characterize our TBN-fabricated GNRs using Raman spectroscopy and IV measurements. The measured sheet resistances of our GNRs fall within the range of 1.65–2.64 kΩ □−1, in agreement with previously reported values. Furthermore, we determined the high-field breakdown current density of GNRs to be approximately 2.94 × 108 A cm−2. This TBN process is seamlessly compatible with existing nanofabrication processes, and is particularly suitable for fabricating GNR based electronic devices including next generation DNA sequencing technologies and beyond silicon field effect transistors.

Graphical abstract: Tip-based nanofabrication of arbitrary shapes of graphene nanoribbons for device applications

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Publication details

The article was received on 10 Mar 2015, accepted on 14 Apr 2015 and first published on 14 Apr 2015


Article type: Paper
DOI: 10.1039/C5RA04257G
Citation: RSC Adv., 2015,5, 37006-37012
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    Tip-based nanofabrication of arbitrary shapes of graphene nanoribbons for device applications

    H. Hu, S. Banerjee, D. Estrada, R. Bashir and W. P. King, RSC Adv., 2015, 5, 37006
    DOI: 10.1039/C5RA04257G

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