| Autor: |
Huynh, Thi Mien Trung, Phan, Thanh Hai, Phillipson, Roald, Volodine, Alexander, De Feyter, Steven |
| Zdroj: |
Journal of Materials Chemistry C; 2/21/2022, Vol. 10 Issue 7, p2696-2702, 7p |
| Abstrakt: |
In this contribution we demonstrate doping of graphene by uncharged dibenzyl viologen (DBV0). Deposited electrochemically on chemical vapor deposited (CVD) graphene on SiO2, DBV0 forms a water-insoluble self-assembled molecular network, in contrast to water-soluble monocationic DBV˙+. The phase formation at the molecular scale is revealed by scanning tunneling microscopy (STM) and atomic force microscopy (AFM). The doping efficiency is characterized by a combination of Raman spectroscopy and Kelvin probe force microscopy (KPFM). The Raman mapping of the G-band of the DBV0 adlayer on top of CVD graphene on SiO2 shows an apparent red shift compared to the unmodified analogue indicating an n-doping effect. This observation is in line with the KPFM results of which the measured contact potential difference (CPD) displays a positive shift compared to that of the pristine graphene. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
