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Related Concept Videos

Secondary Active Transport01:55

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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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Preparation and 3D Tracking of Catalytic Swimming Devices
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Active Anion Delivery by Self-Propelled Microswimmers.

Seyyed Mohsen Beladi-Mousavi1,2, Jonas Klein2, Bahareh Khezri1

  • 1Center for the Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, Prague 166 28, Czech Republic.

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|February 12, 2020
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Summary

Autonomous microswimmers made from polymeric viologen (PV++) can collect and deliver anionic species. These micro-machines offer efficient, stable transport for environmental and biomedical applications.

Keywords:
anionsautonomous motioncargo deliveryenvironmental remediationmicromotorsviologen

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Environmental Science

Background:

  • Self-propelled micro- and nanomachines are crucial for advanced applications.
  • Cationic frameworks for collecting and delivering anionic species are needed for pollutant removal and drug delivery.
  • Autonomous carriers for active anion transport remain underdeveloped.

Purpose of the Study:

  • To develop autonomous microswimmers capable of selective anion collection and delivery.
  • To utilize a polymeric viologen (PV++) for creating these micro-carriers.
  • To investigate the efficiency, stability, and release mechanisms of the developed microswimmers.

Main Methods:

  • Fabrication of tubular autonomous microswimmers using polymeric viologen (PV++).
  • Anion exchange mechanism for cargo loading.
  • Evaluation of anion loading capacity, stability, and leakage.
  • Testing of electrochemical, photochemical, and metathesis reaction release mechanisms.

Main Results:

  • PV++ microswimmers demonstrated selective collection and delivery of anionic species.
  • High anion loading capacity (2.55 × 10^-13 mol anions per microswimmer) was achieved.
  • Exceptional stability with virtually no anion leakage over 4 months.
  • Efficient release mechanisms (up to 98%) were demonstrated.

Conclusions:

  • Polymeric viologen-based microswimmers represent a novel class of autonomous carriers for anions.
  • These micro-machines offer high loading capacity, stability, and controlled release.
  • They hold significant promise for next-generation biomedical and environmental remediation technologies.