Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2011 Jun 26;6(7):439-45.
doi: 10.1038/nnano.2011.94.

Bi- and trilayer graphene solutions

Affiliations

Bi- and trilayer graphene solutions

Chih-Jen Shih et al. Nat Nanotechnol. .

Abstract

Bilayer and trilayer graphene with controlled stacking is emerging as one of the most promising candidates for post-silicon nanoelectronics. However, it is not yet possible to produce large quantities of bilayer or trilayer graphene with controlled stacking, as is required for many applications. Here, we demonstrate a solution-phase technique for the production of large-area, bilayer or trilayer graphene from graphite, with controlled stacking. The ionic compounds iodine chloride (ICl) or iodine bromide (IBr) intercalate the graphite starting material at every second or third layer, creating second- or third-stage controlled graphite intercolation compounds, respectively. The resulting solution dispersions are specifically enriched with bilayer or trilayer graphene, respectively. Because the process requires only mild sonication, it produces graphene flakes with areas as large as 50 µm(2). Moreover, the electronic properties of the flakes are superior to those achieved with other solution-based methods; for example, unannealed samples have resistivities as low as ∼1 kΩ and hole mobilities as high as ∼400 cm(2) V(-1) s(-1). The solution-based process is expected to allow high-throughput production, functionalization, and the transfer of samples to arbitrary substrates.

PubMed Disclaimer

References

    1. Nat Mater. 2007 Oct;6(10):770-5 - PubMed
    1. Nano Lett. 2009 Jan;9(1):30-5 - PubMed
    1. Phys Rev Lett. 2006 Nov 3;97(18):187401 - PubMed
    1. Nanotechnology. 2010 Jun 25;21(25):255703 - PubMed
    1. Phys Rev Lett. 2007 Dec 21;99(25):256802 - PubMed

Publication types

LinkOut - more resources