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Keywords:

  • electrochemistry;
  • nanowires;
  • photonics;
  • porous materials;
  • semiconductors
Thumbnail image of graphical abstract

The cover illustrates a forest of bicolor porous silicon nanowires with modulated porosity. M. Ferrari et al. report on page 2231 the synthesis of biodegradable porous silicon barcode nanowires with segment-specific morphological, mechanical, and photonic properties by metal-assisted etching. The presented phase diagrams of nanostructures contribute to clarify the competing roles of metal nanoparticles and ions in the formation of various silicon nanostructures, enabling application-specific design.