Polypyrrole whelk-like arrays toward robust controlling manipulation of organic droplets underwater

Xianyong Lu, Zhuang Kong, Guozheng Xiao, Chao Teng, Yunan Li, Guangyuan Ren, Shuangbao Wang, Ying Zhu, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)


Whelk-like polypyrrole (PPy) arrays film is successfully prepared by electropolymerization of pyrrole in the presence of low-surface-energy tetraethylammonium perfluorooctanesulfonate (TEAPFOS) as dopant. The underwater wettability of PPy whelk-like arrays can be successfully tuned by electrical doping/dedoping of PFOS ions. Interestingly, CCl4 droplets with microliter-size as a representative sample are gathered together to form a larger droplet underwater at the potential of +0.8 V (vs Ag/AgCl), because PPy is in its PFOS-doped states. Note that CCl4 droplet can climb uphill successfully on the inclined whelk-like arrays PPy film under the applied potential of −1.0 V (vs Ag/AgCl), which may be attributed to wettability gradient derived from different oxidation states of PPy induced by electrochemical potential. These results may provide a simple strategy for on-demand manipulation of organic droplets underwater at low voltage.

Original languageEnglish
Article number1701938
Number of pages7
Issue number40
Publication statusPublished - 25 Oct 2017
Externally publishedYes


  • electrochemical responsive
  • organic droplet manipulation
  • underwater
  • whelk-like polypyrrole

Cite this