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Polymer Bulletin

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01-12-2018 | Original Paper

Preparation of Ag₂Se QDs with excellent aqueous dispersion stability by organic coating with aqueous ATRP

Authors: Yoshio Nakahara, Yuki Kunitsu, Nobuhiko Ozaki, Mutsuo Tanaka, Setsuko Yajima

Published in: Polymer Bulletin | Issue 9/2019

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Abstract

In this article, water-dispersible Ag₂Se quantum dots (QDs) were prepared by the facile and environmental-friendly method. In our approach, atom transfer radical polymerization (ATRP) was adopted in aqueous media to grow polymer chains from the surface of Ag₂Se QDs. The aqueous ATRP allows the very mild synthetic conditions. In the present work, the polymerization reaction of methoxy[oligo(ethylene glycol)] methacrylate (OEGMA) was carried out at room temperature under aqueous conditions after the incorporation of 2-bromopropionyl moiety as the ATRP initiator on the surface of Ag₂Se QDs by the ligand exchange method. OEGMA-coated Ag₂Se QDs were successfully obtained without significant morphological change. The aqueous dispersion stability of OEGMA-coated Ag₂Se QDs was compared with that of conventional water-dispersible Ag₂Se QDs prepared by the simple modification with 11-mercaptoundecanoic acid. As a result, OEGMA-coated Ag₂Se QDs showed the extremely high aqueous dispersion stability.

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Title: Preparation of Ag2Se QDs with excellent aqueous dispersion stability by organic coating with aqueous ATRP
Authors: Yoshio Nakahara
Yuki Kunitsu
Nobuhiko Ozaki
Mutsuo Tanaka
Setsuko Yajima
Publication date: 01-12-2018
Publisher: Springer Berlin Heidelberg
Published in: Polymer Bulletin / Issue 9/2019
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI: https://doi.org/10.1007/s00289-018-2627-0

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