Catalytic Self‐Propulsion of Supramolecular Capsules Powered by Polyoxometalate Cargos

Mercato, Loretta L. del; Carraro, Mauro; Zizzari, Alessandra; Bianco, Monica; Miglietta, Ruggero; Arima, Valentina; Viola, Ilenia; Nobile, Concetta; Sorarù, Antonio; Vilona, Debora; Gigli, Giuseppe; Bonchio, Marcella; Rinaldi, R.

doi:10.1002/chem.201403171

Cited by 29 publications

(30 citation statements)

References 34 publications

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“…The high propulsion velocity and facile synthesis of heptamolybdate SOM hold considerable importance in the field of active matter and can be used in future for cargo transport 34 , catalysis 35 and drug release 36 . The motility in SOMs stems from the evolution of the SO 2 gases by the oxidation of dithionite to SO 2 with concomitant reduction of Mo 7 -SOMs to molybdenum blue type SOMs.…”

Section: Discussionmentioning

confidence: 99%

Autonomous movement induced in chemically powered active soft-oxometalates using dithionite as fuel

2016

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Synthesis of autonomously moving nano or micromotors is an immediate challenge in current nanoscience and nanotechnology. In this work we report a system based on soft-oxometalates (SOMs) which is very easy to synthesize and moves autonomously in response to chemical stimuli like that of a reducing agent-dithionite. The redox active Mo VI sites of SOMs are used for oxidizing dithionite to generate SO2 to propel the micromotors. We explain this motion qualitatively and also show how surface interaction, adsorption isotherm of the evolved gas influence power conversion efficiency of these micromotors.

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Section: Discussionmentioning

confidence: 99%

Autonomous movement induced in chemically powered active soft-oxometalates using dithionite as fuel

2016

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Section: Catalytic Materials For Mnmsmentioning

confidence: 99%

“…The hydrodynamic and electrostatic forces operating at short and long distances, respectively, contribute to the reorientations and assembly of the particles. Polyelectrolyte microcapsules loaded with ruthenium polyoxometalate (Ru 4 POM) complex present another strategy to synthesize self‐propelling micromotors . Figure C illustrates the composition of the polyelectrolyte multilayer capsule with loaded Ru 4 POM complexes, prepared by the layer‐by‐layer assembly.…”

Section: Catalytic Materials For Mnmsmentioning

confidence: 99%

Progress toward Catalytic Micro‐ and Nanomotors for Biomedical and Environmental Applications

2018

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Synthetic micro- and nanomotors (MNMs) are tiny objects that can autonomously move under the influence of an appropriate source of energy, such as a chemical fuel, magnetic field, ultrasound, or light. Chemically driven MNMs are composed of or contain certain reactive material(s) that convert chemical energy of a fuel into kinetic energy (motion) of the particles. Several different materials have been explored over the last decade for the preparation of a wide variety of MNMs. Here, the discovery of materials and approaches to enhance the efficiency of chemically driven MNMs are reviewed. Several prominent applications of the MNMs, especially in the fields of biomedicine and environmental science, are also discussed, as well as the limitations of existing materials and future research directions.

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“…A tetra‐substituted Ru IV polyoxometalate with the ability to catalytically decompose H 2 O 2 into water and oxygen has also been introduced into the PEM capsules to serve as the catalyst . The Ru IV polyoxometalate Na 10 [Ru 4 (H 2 O) 4 (μ‐O) 4 (μ‐OH) 2 (γ‐SiW 10 O 36 ) 2 ] is sandwiched into the multilayer walls of the LbL‐assembled microcapsules.…”

Section: Nanoarchitectonics For Mnmsmentioning

confidence: 99%

Self‐Propelled Micro‐/Nanomotors Based on Controlled Assembled Architectures

et al. 2015

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Synthetic micro-/nanomotors (MNMs) are capable of performing self-propelled motion in fluids through harvesting different types of energies into mechanical movement, with potential applications in biomedicine and other fields. To address the challenges in these applications, a promising strategy that combines controlled assembly (bottom-up approaches) with top-down approaches for engineering autonomous, multifunctionalized MNMs is under investigation, beginning in 2012. These MNMs, derived from layer-by-layer assembly or molecular self-assembly, display the advantages of: i) mass production, ii) response to the external stimuli, and iii) access to multifunctionality, biocompatibility, and biodegradability. The advance on how to integrate diverse functional components into different architectures based on controlled assemblies, to realize controlled fabrication, motion control (including the movement speed, direction, and state), and biomedical applications of MNMs, directed by the concept of nanoarchitectonics, are highlighted here. The remaining challenges and future research directions are also discussed.

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Catalytic Self‐Propulsion of Supramolecular Capsules Powered by Polyoxometalate Cargos

Cited by 29 publications

References 34 publications

Autonomous movement induced in chemically powered active soft-oxometalates using dithionite as fuel

Autonomous movement induced in chemically powered active soft-oxometalates using dithionite as fuel

Progress toward Catalytic Micro‐ and Nanomotors for Biomedical and Environmental Applications

Self‐Propelled Micro‐/Nanomotors Based on Controlled Assembled Architectures

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