4.8 Article

Dual Magnetobiochemical Logic Control of Electrochemical Processes Based on Local Interfacial pH Changes

Journal

ACS APPLIED MATERIALS & INTERFACES
Volume 1, Issue 6, Pages 1166-1168

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/am900185c

Keywords

switchable interface; local pH change; enzyme; modified electrode; magnetic nanoparticles; logic gate

Funding

  1. NSF [DMR-0706209]
  2. ONR [N00014-08-1-1202]
  3. SRC [2008-RJ-1839G]
  4. Clarkson University

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An electrode surface modified with a pH-sensitive polymeric brush was reversibly activated by local pH changes produced in situ by glucose oxidase associated with magnetic nanoparticles confined at the surface in the presence of an external magnet. The system mimics Boolean AND logic gate, with the magnetic and chemical input signals stimulating the electrochemical reactions at the switchable interface. Biomedical applications of the smart interface controlled by enzymatic reactions through local pH changes are anticipated in various implantable biomedical devices.

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