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  Nanopropellers and their actuation in complex viscoelastic media

Schamel, D., Mark, A. G., Gibbs, J. G., Miksch, C., Morozov, K. I., Leshansky, A. M., et al. (2014). Nanopropellers and their actuation in complex viscoelastic media. ACS Nano, 8(9), 8794-8801. doi:10.1021/nn502360t.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-0772-D Version Permalink: https://hdl.handle.net/21.11116/0000-000E-4AE1-1
Genre: Journal Article

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 Creators:
Schamel, Debora, Author
Mark, Andrew G., Author
Gibbs, John G., Author
Miksch, Cornelia, Author
Morozov, Konstantin I., Author
Leshansky, Alexander M., Author
Fischer, Peer1, Author                 
Affiliations:
1Max Planck Institute for Medical Research, Max Planck Society, ou_1125545              

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Free keywords: Brownian motion; glancing angle deposition; magnetic actuation; micropropulsion; polymeric networks; vapor deposition; viscoelastic fluids
 Abstract: Tissue and biological fluids are complex viscoelastic media with a nanoporous macromolecular structure. Here, we demonstrate that helical nanopropellers can be controllably steered through such a biological gel. The screw-propellers have a filament diameter of about 70 nm and are smaller than previously reported nanopropellers as well as any swimming microorganism. We show that the nanoscrews will move through high-viscosity solutions with comparable velocities to that of larger micropropellers, even though they are so small that Brownian forces suppress their actuation in pure water. When actuated in viscoelastic hyaluronan gels, the nanopropellers appear to have a significant advantage, as they are of the same size range as the gel's mesh size. Whereas larger helices will show very low or negligible propulsion in hyaluronan solutions, the nanoscrews actually display significantly enhanced propulsion velocities that exceed the highest measured speeds in Newtonian fluids. The nanopropellers are not only promising for applications in the extracellular environment but small enough to be taken up by cells.

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Language(s): eng - English
 Dates: 2014-04-302014-06-092014-06-092014-09-23
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/nn502360t
BibTex Citekey: nn502360t
URI: https://pubmed.ncbi.nlm.nih.gov/24911046/
 Degree: -

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Title: ACS Nano
  Other : ACS Nano
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 8 (9) Sequence Number: - Start / End Page: 8794 - 8801 Identifier: ISSN: 1936-0851
CoNE: https://pure.mpg.de/cone/journals/resource/1936-0851