A programmable
multitarget-response electrochemical imaging technique
was presented using scanning electrochemical microscopy (SECM) combined
with a self-designed waveform. The potential waveform applied to the
tip decreased the charging current caused by the potential switch,
enhancing the signal-to-noise ratio. This programmable SECM (P-SECM)
method was used to scan a metal strip for verifying its feasibility
in feedback mode. Since it could achieve simultaneous multitarget
imaging during one single imaging process, PC12 cells status was imaged
and identified through three different molecules (FcMeOH, Ru(NH3)6
3+, and oxygen). The FcMeOH image
eliminated the error from cell height, and the Ru(NH3)6
3+ image verified the change of membrane permeability.
Moreover, the oxygen image demonstrated the bioactivity of the cell
via its intensity of respiration. Combining information from these
three molecules, the cell status could be determined accurately and
also the error caused by time consumption with multiple scans in traditional
SECM was eliminated.
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