Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 15, Pages 5941-5946Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja110939a
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [10934007, 10874177]
- special funds for the Major State Basic Research of China [2009CB929301]
- ERG
- EPSRC [EP/G042357/1]
- Royal Society
- EU [PITN-GA-2010-264694]
- Nokia Research Centre, Cambridge
- EPSRC [EP/G042357/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G042357/1] Funding Source: researchfish
Ask authors/readers for more resources
We use anhydrous ferric chloride (FeCl3) to intercalate graphite flakes consisting of 2-4 graphene layers and to dope graphene monolayers. The intercalant, staging, stability, and doping of the resulting intercalation compounds (ICs) are characterized by Raman scattering. The G peak of heavily doped monolayer graphene upshifts to similar to 1627 cm(-1). The 2-4 layer ICs have similar upshifts, and a Lorentzian line decoupled heavily doped monolayer. By performing Raman shape for the 2D band, indicating that each layer behaves as a measurements at different excitation energies, we show that, for a given doping level, the 2D peak can be suppressed by Pauli blocking for laser energy below the doping level. Thus, multiwavelength Raman spectroscopy allows a direct measurement of the Fermi level, complementary to that derived by performing measurements at fixed excitation energy significantly higher than the doping level. This allows us to estimate a Fermi level shift of up to similar to 0.9 eV. These ICs are thus ideal test-beds for the physical and chemical properties of heavily doped graphenes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available