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  Chemical nanomotors at the gram scale form a dense active optorheological medium

Choudhury, U., Singh, D. P., Qiu, T., & Fischer, P. (2019). Chemical nanomotors at the gram scale form a dense active optorheological medium. Advanced Materials, 31(12): 1807382, pp. 1-7. doi:10.1002/adma.201807382.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-2826-E Version Permalink: https://hdl.handle.net/21.11116/0000-000B-2827-D
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 Creators:
Choudhury, Udit, Author
Singh, Dhruv P., Author
Qiu, Tian, Author
Fischer, Peer1, Author           
Affiliations:
1Optical Nanoscopy, Max Planck Institute for Medical Research, Max Planck Society, ou_2364730              

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Free keywords: active materials, bulk scale active colloids, chemical nanomotors, light-driven colloids, optically tunable soft matter
 Abstract: The rheological properties of a colloidal suspension are a function of the concentration of the colloids and their interactions. While suspensions of passive colloids are well studied and have been shown to form crystals, gels, and glasses, examples of energy-consuming “active” colloidal suspensions are still largely unexplored. Active suspensions of biological matter, such as motile bacteria or dense mixtures of active actin–motor–protein mixtures have, respectively, reveals superfluid-like and gel-like states. Attractive inanimate systems for active matter are chemically self-propelled particles. It has so far been challenging to use these swimming particles at high enough densities to affect the bulk material properties of the suspension. Here, it is shown that light-triggered asymmetric titanium dioxide that self-propel, can be obtained in large quantities, and self-organize to make a gram-scale active medium. The suspension shows an activity-dependent tenfold reversible change in its bulk viscosity.

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Language(s): eng - English
 Dates: 2018-12-212018-11-142019-01-302019-03-22
 Publication Status: Issued
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/adma.201807382
BibTex Citekey: 2019Choudhury1
 Degree: -

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Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 31 (12) Sequence Number: 1807382 Start / End Page: 1 - 7 Identifier: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855