Přístupnostní navigace
E-application
Search Search Close
Publication result detail
MOHSEN BELADI, M.; KLEIN, J.; KHEZRI, B.; WALDER, L.; PUMERA, M.
Original Title
Active Anion Delivery by Self-Propelled Microswimmers
English Title
Type
WoS Article
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.
English abstract
Keywords
micromotors; viologen; anions; autonomous motion; cargo delivery; environmental remediation
Key words in English
Authors
RIV year
2021
Released
24.03.2020
Publisher
AMER CHEMICAL SOC
Location
WASHINGTON
ISBN
1936-0851
Periodical
ACS Nano
Volume
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" }