Biomimetic Polypyrrole with Hierarchical Structures and Investigation of its Bio-Sensing Properties
Polypyrrole (PPy) with hierarchical structures inherited from butterfly wings were prepared by using a two-step templating process. Firstly, SiO2 replica was synthesized from butterfly wings by using a sonochemical method and then the obtained SiO2 replica was used as template for the fabrication of PPy with hierarchical structures by using an in situ polymerization method. The precise structues of PPy replica down to nanometer’s level were confirmed directly by FE-SEM, TEM images. The primary response of the replicas to dopamine (DA) as a biosensor was investigated by cyclic voltammetry, and it was found that the PPy replicas showed a much higher biological activity compared with that of common PPy powders, probably due to the hierarchical structures as well as controlled porosity inherited from butterfly wings.
Chunliang Zhang and Liangchi Zhang
S. M. Zhu et al., "Biomimetic Polypyrrole with Hierarchical Structures and Investigation of its Bio-Sensing Properties", Key Engineering Materials, Vols. 531-532, pp. 559-562, 2013