2 research outputs found
Structural Correlations in Heterogeneous Electron Transfer at Monolayer and Multilayer Graphene Electrodes
As a new form of carbon, graphene is attracting intense
interest
as an electrode material with widespread applications. In the present
study, the heterogeneous electron transfer (ET) activity of graphene
is investigated using scanning electrochemical cell microscopy (SECCM),
which allows electrochemical currents to be mapped at high spatial
resolution across a surface for correlation with the corresponding
structure and properties of the graphene surface. We establish that
the rate of heterogeneous ET at graphene increases systematically
with the number of graphene layers, and show that the stacking in
multilayers also has a subtle influence on ET kinetics
Mapping Nanoscale Electrochemistry of Individual Single-Walled Carbon Nanotubes
We
introduce a multiprobe platform for the investigation of single-walled
carbon nanotubes (SWNTs) that allows the electrochemical response
of an individual SWNT to be mapped at high spatial resolution and
correlated directly with the intrinsic electronic and structural properties.
With this approach, we develop a detailed picture of the factors controlling
electrochemistry at SWNTs and propose a definitive model that has
major implications for future architectures of SWNT electrode devices