Solution pH regulating mass transport in highly ordered nanopore array electrode

•Nanopore electrode array of 20 nm diameter was prepared using AC deposition.•The nanopore electrode array exhibits microelectrode behavior.•The electrochemistry can be regulated by the surface charge of the nanopores via pH.

A new highly ordered Au nanopore array electrode with pore diameter as small as 20 nm is fabricated using a simple electrochemistry method. The nanopore electrode displays a solution pH regulated quasi-sigmoidal voltammogram for electrochemical probe due to electrostatic interactions.

Graphical abstractA new highly ordered Au nanopore array electrode with pore diameter as small as 20 nm is fabricated using a simple electrochemistry method. The nanopore electrode displays a quasi-sigmoidal voltammogram and exhibits anion electrostatic repulsion at pH > 7. This new nanopore array electrode may find potential applications in biosensing, mass transport, analysis and detection in confined environments.Figure optionsDownload full-size imageDownload as PowerPoint slide