Phase Transfer of AMIET-functionalized Gold Nanoparticles from Aqueous to Organic Solvents

Autor:	Md. Abdullah Al Nahid, Michinori Karikomi, Eri Nasuno, Norihiro Kato, Takaaki Sato, Ken-ichi Iimura
Rok vydání:	2022
Předmět:	General Chemical Engineering Solvents Metal Nanoparticles Water Gold General Medicine General Chemistry Hydrophobic and Hydrophilic Interactions
Zdroj:	Journal of Oleo Science. 71:685-692
ISSN:	1347-3352 1345-8957
DOI:	10.5650/jos.ess21345
Popis:	This paper presents a feasible and reliable phase transfer protocol for polyoxyethylene alkyl amine surfactant (AMIET)-coated gold nanoparticles (AuNPs) in aqueous media to chloroform using a pH-triggered method, through the liquid-liquid interface. In the initial stage, the colloidal aqueous dispersion is destabilized by pH adjustment towards the isoelectric pH of the nanoparticle, which promotes the separation of the particles from water. We further explored a mechanistic view of this phase transfer phenomenon, considering the orientation of hydrophilic and hydrophobic moieties depending on the nature of the surrounding solvent. It was proposed that the AMIET molecules bound to the AuNPs undergo conformational changes through phase transfer. Ultraviolet visible absorption spectra before and after the phase transfer reveal that the original morphology and dispersion states of the particles were preserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8aac50f1c0bc6fed8a6ed382452ba00 https://doi.org/10.5650/jos.ess21345 Zobrazit plný text záznamu