A continuous and reversible mechano-regulated surface potential using a stretchable plasmonic electrode

Manipulating the surface potential of electrode
materials is a critical
issue for improving the devices performance in the fields of nanophotonics,
semiconductor/organic
electronics, optoelectronics, and
electrochemistry. Here, we demonstrate a novel mechano-plasmonic
modulation of surface potential by tailoring the plasmon off-resonance of stretchable
plasmonic
electrode. The surface potential of the stretchable plasmonic electrode can
be continuously and reversibly modulated in the range of 80 mV with high stability
and reproducibility. The proposed plasmon off-resonance assisted electron flow model (POAEF model)
well explored the energy conversion of the plasmon off-resonance excitation
into electrochemical potential of plasmonic nanostructures. Significantly, the programmable
modulations of electrochemical reactions based on the stretchable plasmonic
electrode demonstrate that plasmon off-resonance excitation can be utilized to
modulate the surface potential and the electrochemical activity of
noble-metal nanostructures.