Publication detail

Active Anion Delivery by Self-Propelled Microswimmers

MOHSEN BELADI, M. KLEIN, J. KHEZRI, B. WALDER, L. PUMERA, M.

Original Title

Active Anion Delivery by Self-Propelled Microswimmers

Type

journal article in Web of Science

Language

English

Original Abstract

Self-propelled micro- and nanomachines are at the forefront of materials research, branching into applications in biomedical science and environmental remediation. Cationic frameworks enabling the collection and delivery of anionic species (A(-)) are highly required, due to the large variety of lifethreatening pollutants, such as radioactive technetium and carcinogenic chromium, and medicines, such as dexamethasone derivatives with negative charges. However, such autonomous moving carriers for active transport of the anions have been barely discussed. A polymeric viologen (PV++)-consisting of electroactive bicationic subunits-is utilized in a tubular autonomous microswimmer to selectively deliver A(-) of different sizes and charge densities. The cargo loading is based on a facile anion exchange mechanism. The packed crystal structure of PV++ allows removal of an exceptionally high quantity of anions per one microswimmer (2.55 X 10(-13) mol anions per microswimmer), a critical factor often neglected regarding the real-world application of microswimmers. Notably, there was virtually no leakage of anions during the delivery process or upon keeping the loaded microswimmers under ambient conditions for at least 4 months. Multiple release mechanisms, compatible with different environments, including electrochemical, photochemical, and a metathesis reaction, with high efficiencies up to 98% are introduced. Such functional autonomous micromachines provide great promise for the next generation of functional materials for biomedical and environmental applications.

Keywords

micromotors; viologen; anions; autonomous motion; cargo delivery; environmental remediation

Authors

MOHSEN BELADI, M.; KLEIN, J.; KHEZRI, B.; WALDER, L.; PUMERA, M.

Released

24. 3. 2020

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

1936-0851

Periodical

ACS Nano

Year of study

14

Number

3

State

United States of America

Pages from

3434

Pages to

3441

Pages count

8

URL

https://pubs.acs.org/doi/10.1021/acsnano.9b09525

BibTex

@article{BUT164100,
  author="Mousavi {Mohsen Beladi} and Jonas {Klein} and Bahareh {Khezri} and Lorenz {Walder} and Martin {Pumera}",
  title="Active Anion Delivery by Self-Propelled Microswimmers",
  journal="ACS Nano",
  year="2020",
  volume="14",
  number="3",
  pages="3434--3441",
  doi="10.1021/acsnano.9b09525",
  issn="1936-0851",
  url="https://pubs.acs.org/doi/10.1021/acsnano.9b09525"
}