Please use this identifier to cite or link to this item:
https://doi.org/10.1021/nn501459v
Title: | Imaging and tuning molecular levels at the surface of a gated graphene device | Authors: | Riss, A Wickenburg, S Tan, L.Z Tsai, H.-Z Kim, Y Lu, J Bradley, A.J Ugeda, M.M Meaker, K.L Watanabe, K Taniguchi, T Zettl, A Fischer, F.R Louie, S.G Crommie, M.F |
Keywords: | Density functional theory Electronic states Graphene Molecular orbitals Scanning tunneling microscopy Spectroscopy Back-gate voltages Benzene molecules Molecular adsorbate Organic molecules Scanning tunneling spectroscopy Self energy Single molecule level Vibronic levels Molecules |
Issue Date: | 2014 | Publisher: | American Chemical Society | Citation: | Riss, A, Wickenburg, S, Tan, L.Z, Tsai, H.-Z, Kim, Y, Lu, J, Bradley, A.J, Ugeda, M.M, Meaker, K.L, Watanabe, K, Taniguchi, T, Zettl, A, Fischer, F.R, Louie, S.G, Crommie, M.F (2014). Imaging and tuning molecular levels at the surface of a gated graphene device. ACS Nano 8 (6) : 5395-5401. ScholarBank@NUS Repository. https://doi.org/10.1021/nn501459v | Rights: | Attribution 4.0 International | Abstract: | Gate-controlled tuning of the charge carrier density in graphene devices provides new opportunities to control the behavior of molecular adsorbates. We have used scanning tunneling microscopy (STM) and spectroscopy (STS) to show how the vibronic electronic levels of 1,3,5-tris(2,2-dicyanovinyl)benzene molecules adsorbed onto a graphene/BN/SiO2 device can be tuned via application of a backgate voltage. The molecules are observed to electronically decouple from the graphene layer, giving rise to well-resolved vibronic states in dI/dV spectroscopy at the single-molecule level. Density functional theory (DFT) and many-body spectral function calculations show that these states arise from molecular orbitals coupled strongly to carbon-hydrogen rocking modes. Application of a back-gate voltage allows switching between different electronic states of the molecules for fixed sample bias. © 2014 American Chemical Society. | Source Title: | ACS Nano | URI: | https://scholarbank.nus.edu.sg/handle/10635/183895 | ISSN: | 1936-0851 | DOI: | 10.1021/nn501459v | Rights: | Attribution 4.0 International |
Appears in Collections: | Staff Publications Elements |
Show full item record
Files in This Item:
File | Description | Size | Format | Access Settings | Version | |
---|---|---|---|---|---|---|
10_1021_nn501459v.pdf | 5.33 MB | Adobe PDF | OPEN | None | View/Download |
This item is licensed under a Creative Commons License