Bioinspired superhydrophobic surface constructed from hydrophilic building blocks: A case study of core-shell polypyrrole-coated copper nanoneedles

Yang Liu, Ben Wang, Yuanfeng Wang, Jiareng Chen, Bin Cui, Pengfei Yin, Jianming Chen, Xinyu Zhang, Li Zhang, John H. Xin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


Hydrophilic polypyrrole-coated copper nanoneedles (PPy-CuNDs) were synthesized and utilized to construct a superhydrophobic surface on a polyethylene terephthalate fabric (PET) by using the spray-coating technique. The morphology of the as-synthesized PPy-CuNDs can be facilely tuned by changing the concentration of the reducing agent: hydrazine monohydrate. The CuNDs with well-defined nanocrystalline structures and nanoscale thick, rough PPy coating layers were formed simultaneously in one pot. The PPy-CuNDs self-assembled into an entangled, stacking nanocarpet on the surface of the PET fabric, and they eventually formed a reentrant surface texture similar to that of chrysanthemum leaves. The PPy-CuND-PET surface initially showed good superhydrophobic properties, but a fast transition from the superhydrophobic state to the highly adhesive state was observed. The underlying mechanism of this transition and its potential applications were proposed in the context.

Original languageEnglish
Article number347
Issue number4
Publication statusPublished - 1 Apr 2020


  • Bioinspired
  • Copper
  • Hydrophilic
  • Nanoneedle
  • Polypyrrole
  • Superhydrophobic surface

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this