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Keywords:

  • biomedical applications;
  • drawing lithography;
  • drug delivery;
  • microneedles
Thumbnail image of graphical abstract

Ultrahigh-aspect-ratio microneedles can be fabricated via “drawing lithography”, a novel technique in which a thermosetting polymer is directly drawn from a two-dimensional solid surface without the need for a mask and light irradiation. Kwang Lee and co-workers demonstrate this technique on p. 483. The inside cover shows a scanning electron microscopy (SEM) image of three-dimensional structures with ultrahigh aspect ratios, potentially suitable as drug-delivery devices that could replace hypodermic syringes.