I am curious that EDTA solution (dissolved in solvent) forms a bond with ZnO NPs (Zn+ due to Oxygen vacancy (defect) site)? If yes any references for it? Can electron transfer via this Zn-EDTA weak/complex bond in either direction?
Many nanoparticles are able to form complexes through remaining charged species in the surface. For example gold nanoparticles synthesized with citrate as reducing agent keep some citrate in the surface that interacts with remaining Au+3. (you could start looking for information in that part). Now the ZnO could still transfer charge even with the EDTA but at a different potential. but if you wanna know if the EDTA itself is conductive, perform cyclid voltammetry of a EDTA solution to study its redox characteristics
Dear Umseh,
this is a very interesting technical question of broad interest. There is clearly more than a weak interaction between EDTA and ZnO nanoparticles. In the literature you find various studies describing the use of EDA as capping agent for ZnO nanoparticles and how to influence the morphology of ZnO nanoparticles through adition of EDTA. For a good overview about this topic please read the following useful review article:
Review—Influence of Processing Parameters to Control Morphology and Optical Properties of Sol-Gel Synthesized ZnO Nanoparticles
Article Review—Influence of Processing Parameters to Control Morphol...
This review article has been published Open Access so that the full text is freely available (please see attached pdf file).
Good luck with your research and best wishes, Frank Edelmann
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