https://www.kcl.ac.uk/news/tens-millions-nanoneedles-could-replace-painful-cancer-biopsies
Tens of millions of nanoneedles could replace painful cancer biopsies | King's College London
A patch containing tens of millions of microscopic nanoneedles could soon replace traditional biopsies, scientists have found.
tens of millions
https://experts.illinois.edu/en/publications/epitaxial-growth-of-wosub3sub-nanoneedles-achieved-using-a-facile/
Epitaxial growth of WO3 nanoneedles achieved using a facile flame surface treatment process...