Combines Pulsed Electrodeposition or Pulsed Electropolymerization with Out-of-Phase Pulsed Sonication for Synthesis of Conductive Coatings to be used for Sensing and Biosensing
This bimodal pulsed sonoelectro-deposition or pulsed sonoelectro-polymerization device is a user-friendly apparatus for creating highly conductive transducing nanometal or polymer layers for use in sensing and biosensing. Pulsed electrodeposition is a technique that has recently gained much attention for the deposition of nanometals onto conductive surfaces or nanocarbon defect sites. Previous pulsed electrodeposition techniques suffer from complications associated with fractal diffusion inconsistencies and inconsistent features due to bubble formation, and uncontrolled “overgrowth” of dendritic structures. Researchers at the University of Florida have created a programmable device that allows users to form highly conductive metal or polymer coatings using a pulsed sonication-electrosynthesis approach. This apparatus produces fractal nanometal or polymer features with reduced amorphous structure and a relatively homogenous size distribution. The coatings have an extremely high electroactive surface area relative to other electroplating techniques, and a stability that is comparable or better. The disclosure shows detailed applications of the coating applied to metal and paper surfaces for development of biosensors to detect small molecules or bacteria.
Device allows users to form highly catalytic metal films using pulsed sonication-electrodeposition
- Designed with inexpensive materials, reducing manufacturing and maintenance costs
- Simple to use, discarding the need for specialty expertise
- Improved sensitivity of the biosensor, enabling increased productivity and more efficient operation
In pulsed electrodeposition, a high overvoltage is applied in the same way as traditional electroplating, but the driving potential is applied for shorter time periods, typically less than one second. During the relaxation period (the non-plating time period), a sonication wave is applied that promotes migration of dissolved metal ions to the surface where ion consumption is highest, resulting in a more uniform distribution of metal compared to standard potentiostatic or galvanostatic electrodeposition.