Stimuli Responsive Materials: Biopsy with Thermally-Responsive Untethered Microtools

1. Evin Gultepe¹, 
2. Jatinder S. Randhawa¹,
3. Sachin Kadam¹, 
4. Sumitaka Yamanaka²,
5. Florin M. Selaru², 
6. Eun J. Shin², 
7. Anthony N. Kalloo², 
8. David H. Gracias^1,3

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The first biopsy with untethered, sub-millimeter scale grippers is described by David H. Gracias and co-workers on page 514. The cover shows the retrieval of cells from the bile duct of a live pig using thermally responsive tether-free m-grippers. The retrieved tissue was of a high enough quality and quantity to enable both histological and molecular biology analyses which forms the basis of diagnostics. Image created by Martin Rietveld.