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Dostęp zamkniętySignificant, reversible change in microgel size using electrochemically inducedvolume phase transition
| cris.lastimport.scopus | 2024-02-12T20:28:21Z |
| dc.abstract.en | We have successfully synthesized a novel microgel the volume of which could be reversibly changed byusing an electrochemical trigger. At appropriate potential and at human-body temperature the volumechange was unusually high – by more than one order of magnitude. The starting material was a thermore-sponsive microgel built from N-isopropylacrylamide, sodium acrylate and N,N-bisacryloylcystine as thecrosslinker. The gel has been modified with aminoferrocene through amid-bond formation. The influenceof oxidation state of the ferrocene groups in the microgel on volume phase transition temperature wasdetermined. The –S–S– groups from the N,N-bisacryloylcystine linker were employed in the chemisorp-tion of the microgel particles on the Au electrode surface and the formation of gel monolayers. It appearedthat the microgel layers could be either in the shrunken- or the swollen state depending on the oxidationnumber of the iron atoms in the ferrocene groups. The oxidation number could be changed electrochem-ically and the shrunken–swollen transformation could be repeated many times. The properties of theobtained materials were examined with dynamic light scattering technique, UV–vis spectroscopy, SEMand TEM microscopies and cyclic voltammetry. |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Stojek, Zbigniew |
| dc.contributor.author | Maćkiewicz, Marcin |
| dc.contributor.author | Karbarz, Marcin |
| dc.contributor.author | Romański, Jan |
| dc.contributor.author | Marcisz, Kamil |
| dc.date.accessioned | 2024-01-26T07:36:43Z |
| dc.date.available | 2024-01-26T07:36:43Z |
| dc.date.issued | 2018 |
| dc.description.finance | Nie dotyczy |
| dc.description.volume | 13 |
| dc.identifier.doi | 10.1016/J.APMT.2018.09.006 |
| dc.identifier.issn | 2352-9407 |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/119801 |
| dc.language | eng |
| dc.pbn.affiliation | chemical sciences |
| dc.relation.ispartof | Applied Materials Today |
| dc.relation.pages | 182-189 |
| dc.rights | ClosedAccess |
| dc.sciencecloud | nosend |
| dc.subject.en | Environmentally-sensitive microgels |
| dc.subject.en | Electrosensitivity |
| dc.subject.en | Shrunken–swollen transition |
| dc.title | Significant, reversible change in microgel size using electrochemically inducedvolume phase transition |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |