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Theoretical and Experimental Design of Heavy Metal-Mopping Magnetic Nanoparticles

[Image: see text] Herein, we show a comprehensive experimental, theoretical, and computational study aimed at designing macromolecules able to adsorb a cargo at the nanoscale. Specifically, we focus on the adsorption properties of star diblock copolymers, i.e., macromolecules made by a number f of H...

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Autores principales: Roma, Elia, Corsi, Pietro, Willinger, Max, Leitner, Nikolaus Simon, Zirbs, Ronald, Reimhult, Erik, Capone, Barbara, Gasperi, Tecla
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8021223/
https://www.ncbi.nlm.nih.gov/pubmed/33389993
http://dx.doi.org/10.1021/acsami.0c17759
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author Roma, Elia
Corsi, Pietro
Willinger, Max
Leitner, Nikolaus Simon
Zirbs, Ronald
Reimhult, Erik
Capone, Barbara
Gasperi, Tecla
author_facet Roma, Elia
Corsi, Pietro
Willinger, Max
Leitner, Nikolaus Simon
Zirbs, Ronald
Reimhult, Erik
Capone, Barbara
Gasperi, Tecla
author_sort Roma, Elia
collection PubMed
description [Image: see text] Herein, we show a comprehensive experimental, theoretical, and computational study aimed at designing macromolecules able to adsorb a cargo at the nanoscale. Specifically, we focus on the adsorption properties of star diblock copolymers, i.e., macromolecules made by a number f of H-T diblock copolymer arms tethered on a central core; the H monomeric heads, which are closer to the tethering point, are attractive toward a specific target, while the T monomeric tails are neutral to the cargo. Experimentally, we exploited the adaptability of poly(2-oxazoline)s (POxs) to realize block copolymer-coated nanoparticles with a proper functionalization able to interact with heavy metals and show or exhibit a thermoresponsive behavior in aqueous solution. We here present the synthesis and analysis of the properties of a high molecular mass block copolymer featured by (i) a polar side chain, capable of exploiting electrostatic and hydrophilic interaction with a predetermined cargo, and (ii) a thermoresponsive scaffold, able to change the interaction with the media by tuning the temperature. Afterward, the obtained polymers were grafted onto iron oxide nanoparticles and the thermoresponsive properties were investigated. Through isothermal titration calorimetry, we then analyzed the adsorption properties of the synthesized superparamagnetic nanoparticles for heavy metal ions in aqueous solution. Additionally, we use a combination of scaling theories and simulations to link equilibrium properties of the system to a prediction of the loading properties as a function of size ratio and effective interactions between the considered species. The comparison between experimental results on adsorption and theoretical prediction validates the whole design process.
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spelling pubmed-80212232021-04-06 Theoretical and Experimental Design of Heavy Metal-Mopping Magnetic Nanoparticles Roma, Elia Corsi, Pietro Willinger, Max Leitner, Nikolaus Simon Zirbs, Ronald Reimhult, Erik Capone, Barbara Gasperi, Tecla ACS Appl Mater Interfaces [Image: see text] Herein, we show a comprehensive experimental, theoretical, and computational study aimed at designing macromolecules able to adsorb a cargo at the nanoscale. Specifically, we focus on the adsorption properties of star diblock copolymers, i.e., macromolecules made by a number f of H-T diblock copolymer arms tethered on a central core; the H monomeric heads, which are closer to the tethering point, are attractive toward a specific target, while the T monomeric tails are neutral to the cargo. Experimentally, we exploited the adaptability of poly(2-oxazoline)s (POxs) to realize block copolymer-coated nanoparticles with a proper functionalization able to interact with heavy metals and show or exhibit a thermoresponsive behavior in aqueous solution. We here present the synthesis and analysis of the properties of a high molecular mass block copolymer featured by (i) a polar side chain, capable of exploiting electrostatic and hydrophilic interaction with a predetermined cargo, and (ii) a thermoresponsive scaffold, able to change the interaction with the media by tuning the temperature. Afterward, the obtained polymers were grafted onto iron oxide nanoparticles and the thermoresponsive properties were investigated. Through isothermal titration calorimetry, we then analyzed the adsorption properties of the synthesized superparamagnetic nanoparticles for heavy metal ions in aqueous solution. Additionally, we use a combination of scaling theories and simulations to link equilibrium properties of the system to a prediction of the loading properties as a function of size ratio and effective interactions between the considered species. The comparison between experimental results on adsorption and theoretical prediction validates the whole design process. American Chemical Society 2021-01-03 2021-01-13 /pmc/articles/PMC8021223/ /pubmed/33389993 http://dx.doi.org/10.1021/acsami.0c17759 Text en © 2021 American Chemical Society Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Roma, Elia
Corsi, Pietro
Willinger, Max
Leitner, Nikolaus Simon
Zirbs, Ronald
Reimhult, Erik
Capone, Barbara
Gasperi, Tecla
Theoretical and Experimental Design of Heavy Metal-Mopping Magnetic Nanoparticles
title Theoretical and Experimental Design of Heavy Metal-Mopping Magnetic Nanoparticles
title_full Theoretical and Experimental Design of Heavy Metal-Mopping Magnetic Nanoparticles
title_fullStr Theoretical and Experimental Design of Heavy Metal-Mopping Magnetic Nanoparticles
title_full_unstemmed Theoretical and Experimental Design of Heavy Metal-Mopping Magnetic Nanoparticles
title_short Theoretical and Experimental Design of Heavy Metal-Mopping Magnetic Nanoparticles
title_sort theoretical and experimental design of heavy metal-mopping magnetic nanoparticles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8021223/
https://www.ncbi.nlm.nih.gov/pubmed/33389993
http://dx.doi.org/10.1021/acsami.0c17759
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