PMID- 21141990
OWN - NLM
STAT- MEDLINE
DCOM- 20110425
LR  - 20200930
IS  - 1530-6992 (Electronic)
IS  - 1530-6984 (Linking)
VI  - 11
IP  - 1
DP  - 2011 Jan 12
TI  - Probing charge transfer at surfaces using graphene transistors.
PG  - 132-7
LID - 10.1021/nl103015w [doi]
AB  - Graphene field effect transistors (FETs) are extremely sensitive to gas exposure. 
      Charge transfer doping of graphene FETs by atmospheric gas is ubiquitous but not 
      yet understood. We have used graphene FETs to probe minute changes in 
      electrochemical potential during high-purity gas exposure experiments. Our study 
      shows quantitatively that electrochemistry involving adsorbed water, graphene, 
      and the substrate is responsible for doping. We not only identify the 
      water/oxygen redox couple as the underlying mechanism but also capture the 
      kinetics of this reaction. The graphene FET is highlighted here as an extremely 
      sensitive potentiometer for probing electrochemical reactions at interfaces, 
      arising from the unique density of states of graphene. This work establishes a 
      fundamental basis on which new electrochemical nanoprobes and gas sensors can be 
      developed with graphene.
FAU - Levesque, Pierre L
AU  - Levesque PL
AD  - Regroupement Quebecois sur les materiaux de pointe, Universite de Montreal, 
      Montreal, Quebec H3C 3J7, Canada. p.levesque@umontreal.ca
FAU - Sabri, Shadi S
AU  - Sabri SS
FAU - Aguirre, Carla M
AU  - Aguirre CM
FAU - Guillemette, Jonathan
AU  - Guillemette J
FAU - Siaj, Mohamed
AU  - Siaj M
FAU - Desjardins, Patrick
AU  - Desjardins P
FAU - Szkopek, Thomas
AU  - Szkopek T
FAU - Martel, Richard
AU  - Martel R
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20101209
PL  - United States
TA  - Nano Lett
JT  - Nano letters
JID - 101088070
RN  - 059QF0KO0R (Water)
RN  - 7782-42-5 (Graphite)
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - Electrochemistry
MH  - Electron Transport
MH  - Graphite/*chemistry
MH  - Oxidation-Reduction
MH  - Oxygen/*chemistry
MH  - Transistors, Electronic
MH  - Water/*chemistry
EDAT- 2010/12/15 06:00
MHDA- 2011/04/26 06:00
CRDT- 2010/12/15 06:00
PHST- 2010/12/15 06:00 [entrez]
PHST- 2010/12/15 06:00 [pubmed]
PHST- 2011/04/26 06:00 [medline]
AID - 10.1021/nl103015w [doi]
PST - ppublish
SO  - Nano Lett. 2011 Jan 12;11(1):132-7. doi: 10.1021/nl103015w. Epub 2010 Dec 9.