4.8 Article

Dynamic Coupling at the Ångstrom Scale

Journal

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 3, Pages 1113-1117

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201509237

Keywords

catalysis; diffusion; NMR spectroscopy; organometallic compounds; self-propulsion

Funding

  1. Penn State MRSEC
  2. Department of Energy, Office of Basic Energy Sciences

Ask authors/readers for more resources

While momentum transfer from active particles to their immediate surroundings has been studied for both synthetic and biological micron-scale systems, a similar phenomenon was presumed unlikely to exist at smaller length scales due to the dominance of viscosity in the ultralow Reynolds number regime. Using diffusion NMR spectroscopy, we studied the motion of two passive tracerstetramethylsilane and benzenedissolved in an organic solution of active Grubbs catalyst. Significant enhancements in diffusion were observed for both the tracers and the catalyst as a function of reaction rate. A similar behavior was also observed for the enzyme urease in aqueous solution. Surprisingly, momentum transfer at the molecular scale closely resembles that reported for microscale systems and appears to be independent of swimming mechanism. Our work provides new insight into the role of active particles on advection and mixing at the angstrom ngstrom scale.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available