Electrochemical bubble generation via hydrazine oxidation for the in situ control of an electrodeposited conducting polymer micro/-nanostructure

We show the in situ electrochemical gas bubbles generation by discharging hydrazine in organic electrolytes as a template to manipulate the PPy nanostructure morphology

David Possetto; Luciana Fernández; Gabriela Marzari; Fernando Fungo

2021

Scholarcy highlights

  • Great research efforts are nowadays made to develop organic conducting polymers due to their great importance for numerous applications, such as biological or chemical sensors, energy conversion and storage, electronic and optoelectronic devices, solar cells, and lighting systems. This wide range of potential applications demands multifunctional materials with speci c physicochemical properties, which can be tailored owing to the in nite versatility of the organic chemistry. On the other hand, the working principles of many of those applications demand the use of polymer materials in solid-state as a thin lm. aside from the adequate physicochemical properties of organic conducting polymers, the material must be able to form lms with the correct thickness and morphology for a speci c application
  • We show the in situ electrochemical gas bubbles generation by discharging hydrazine in organic electrolytes as a template to manipulate the PPy nanostructure morphology
  • We demonstrate that through the control of the hydrazine concentration and electrochemical parameters, it is possible to get a precise tuning of the diameter and density of tubular or hollow structures on a PPy lm synthesized by a onestep electrochemical method
  • The obtained results suggest that the formation of hollow structures obtained by the pyrrole electropolymerization is a consequence of the in situ release of gas bubbles from the electrochemical oxidation of N2H4 at 0.30 V
  • The generated bubbles act as a template that forces the PPy deposition around the spherical bubble, and their size, shape, and density depend on the N2H4 concentration and the time applied to 0.30 V
  • It was proposed that N2H4 interacts as a reduction agent in the electropolymerization process. This novel approach can be implemented by numerous other systems of templatefree fabrication and it could have a high impact on a wide range of electrodeposited materials

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