dc.contributor.author | Aboudzadeh, M. Ali | |
dc.contributor.author | Kruse, Joscha | |
dc.contributor.author | Sanromán Iglesias, María | |
dc.contributor.author | Cangialosi, Daniele | |
dc.contributor.author | Alegría Loinaz, Angel María | |
dc.contributor.author | Grzelczak, Marek | |
dc.contributor.author | Barroso Bujans, Fabienne | |
dc.date.accessioned | 2021-09-24T12:23:20Z | |
dc.date.available | 2021-09-24T12:23:20Z | |
dc.date.issued | 2021-09-07 | |
dc.identifier.citation | Soft Matter 17(33) : 7792-7801 (2021) | es_ES |
dc.identifier.issn | 1744-683X | |
dc.identifier.issn | 1744-6848 | |
dc.identifier.issn | 10.1039/d1sm00720c | |
dc.identifier.uri | http://hdl.handle.net/10810/53139 | |
dc.description.abstract | The colloidal stability of metal nanoparticles is tremendously dependent on the thermal behavior of polymer brushes. Neat polyethylene glycol (PEG) presents an unconventional upper critical solution temperature in ethanol, where phase segregation and crystallization coexist. This thermal behavior translated to a PEG brush has serious consequences on the colloidal stability in ethanol of gold nanoparticles (AuNPs) modified with PEG brushes upon cooling. We observed that AuNPs (13 nm diameter) stabilized with conventional linear PEG brushes (M-n = 6 and 11 kg mol(-1)) in ethanol suffer from reversible phase separation upon a temperature drop over the course of a few hours. However, the use of a polymer brush with cyclic topology as a stabilizer prevents sedimentation, ensuring the colloidal stability in ethanol at -25 degrees C for, at least, four months. We postulate that temperature-driven collapse of chain brushes promotes the interpenetration of linear chains, causing progressive AuNP sedimentation, a process that is unfavorable for cyclic polymer brushes whose topology prevents chain interpenetration. This study reinforces the notion about the importance of polymer topology on the colloidal stability of AuNPs. | es_ES |
dc.description.sponsorship | We thank J. I. Miranda for NMR experiments and both, J. I. Miranda and A. Moreno for helpful discussions. We also gratefully acknowledge support from the Spanish Ministry "Ministerio de Ciencia, Innovacion y Universidades" (PGC2018-094548-B-I00, MICINN/FEDER, UE, and PID2019-111772RB-I00), Basque Government (IT-1175-19 and PIBA 2018-34) and Diputacion Foral de Guipuzcoa (RED 2018).
Document | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | The Royal Society of Chemistry | es_ES |
dc.relation | info:eu-repo/grantAgreement/MCIU/PGC2018-094548-B-I00 | es_ES |
dc.relation | info:eu-repo/grantAgreement/MCIU/PID2019-111772RB-I00 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/3.0/es/ | * |
dc.subject | poly(ethylene oxide) | es_ES |
dc.subject | polymer brushes | es_ES |
dc.subject | phase-transfer | es_ES |
dc.subject | topology | es_ES |
dc.subject | solvent | es_ES |
dc.subject | impact | es_ES |
dc.title | Gold nanoparticles endowed with low-temperature colloidal stability by cyclic polyethylene glycol in ethanol | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | The Royal Society of Chemistry 2021. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. | es_ES |
dc.rights.holder | Atribución-NoComercial 3.0 España | * |
dc.relation.publisherversion | https://pubs.rsc.org/en/content/articlelanding/2021/SM/D1SM00720C | es_ES |
dc.departamentoes | Polímeros y Materiales Avanzados: Física, Química y Tecnología | es_ES |
dc.departamentoeu | Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia | es_ES |