We introduce the concept of screen-printed back-to-back electroanalytical
sensors where in this facile and generic approach, screenprinted
electrodes are printed back-to-back with a common electrical
connection to the two working electrodes with the counter and
reference electrodes for each connected in the same manner as a
normal “traditional” screen-printed sensor would be. This approach
utilises the usually redundant back of the screen-printed sensor,
converting this “dead-space” into a further electrochemical sensor
which results in improvements in the analytical performance. In the
use of the back-to-back design, the electrode area is consequently
doubled with improvements in the analytical performance observed
with the analytical sensitivity (gradient of a plot of peak height/
analytical signal against concentration) doubling and the corresponding
limit-of-detection being reduced.We also demonstrate that
through intelligent electrode design, a quadruple in the observed
analytical sensitivity can also be realised when double microband
electrodes are used in the back-to-back configuration as long as they
are placed sufficiently apart such that no diffusional interaction
occurs. Such work is generic in nature and can be facilely applied to a
plethora of screen-printed (and related) sensors utilising the
commonly overlooked redundant back of the electrode providing
facile improvements in the electroanalytical performance
