Long-Term Colloidally Stable Aqueous Dispersions of ≤5 nm Spinel Ferrite Nanoparticles.
SAXS
colloidal stability
ferrites
nanoparticles
spinel phase
Journal
ChemistryOpen
ISSN: 2191-1363
Titre abrégé: ChemistryOpen
Pays: Germany
ID NLM: 101594811
Informations de publication
Date de publication:
11 2020
11 2020
Historique:
received:
23
10
2020
revised:
30
10
2020
entrez:
9
12
2020
pubmed:
10
12
2020
medline:
10
12
2020
Statut:
epublish
Résumé
Applications in biomedicine and ferrofluids, for instance, require long-term colloidally stable, concentrated aqueous dispersions of magnetic, biocompatible nanoparticles. Iron oxide and related spinel ferrite nanoparticles stabilized with organic molecules allow fine-tuning of magnetic properties via cation substitution and water-dispersibility. Here, we synthesize≤5 nm iron oxide and spinel ferrite nanoparticles, capped with citrate, betaine and phosphocholine, in a one-pot strategy. We present a robust approach combining elemental (CHN) and thermal gravimetric analysis (TGA) to quantify the ratio of residual solvent molecules and organic stabilizers on the particle surface, being of particular accuracy for ligands with heteroatoms compared to the solvent. SAXS experiments demonstrate the long-term colloidal stability of our aqueous iron oxide and spinel ferrite nanoparticle dispersions for at least 3 months. By the use of SAXS we approved directly the colloidal stability of the nanoparticle dispersions for high concentrations up to 100 g L
Identifiants
pubmed: 33294306
doi: 10.1002/open.202000313
pmc: PMC7692645
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Pagination
1214-1220Informations de copyright
© 2020 The Authors. Published by The Chemical Society of Japan & Wiley-VCH GmbH.
Déclaration de conflit d'intérêts
The authors declare no conflict of interest.
Références
Angew Chem Int Ed Engl. 2007;46(8):1222-44
pubmed: 17278160
ACS Nano. 2020 May 26;14(5):5480-5490
pubmed: 32343552
Inorg Chem. 2002 Nov 18;41(23):6137-46
pubmed: 12425644
Nanoscale. 2011 Jul;3(7):2819-43
pubmed: 21629911
Chem Rev. 2015 Oct 14;115(19):10637-89
pubmed: 26250431
ChemistryOpen. 2020 Nov 27;9(11):1214-1220
pubmed: 33294306
PLoS One. 2019 Jun 24;14(6):e0218789
pubmed: 31233549
J Am Chem Soc. 2019 Jun 12;141(23):9197-9201
pubmed: 31145608
Nanomedicine. 2016 Aug;12(6):1663-701
pubmed: 27013135
Nanoscale. 2018 Dec 7;10(45):21244-21253
pubmed: 30417908
Langmuir. 2011 Mar 15;27(6):2271-8
pubmed: 21284390
Phys Chem Chem Phys. 2008 Feb 21;10(7):1053-66
pubmed: 18259645
Langmuir. 2007 Mar 27;23(7):4026-8
pubmed: 17335257
Nano Lett. 2009 Dec;9(12):4042-8
pubmed: 19835370
J Colloid Interface Sci. 2003 Oct 1;266(1):215-8
pubmed: 12957602
Rev Sci Instrum. 2019 Apr;90(4):043905
pubmed: 31043011