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A Novel Physical Approach for Cationic-Thiolate Protected Fluorescent Gold Nanoparticles

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Title: A Novel Physical Approach for Cationic-Thiolate Protected Fluorescent Gold Nanoparticles
Authors: Ishida, Yohei Browse this author
Lee, Chaiyathat Browse this author
Yonezawa, Tetsu Browse this author →KAKEN DB
Issue Date: 21-Oct-2015
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 5
Start Page: 15372
Publisher DOI: 10.1038/srep15372
Abstract: Knowledge on the synthesis of cationically charged fluorescent gold nanoparticles (Au NPs) is limited because the electrostatic repulsion between cationic ligands on the surface of NP hinders the formation of small Au NPs (usually less than ca. 2 nm) during nucleation in solvents. We herein propose a novel methodology for a synthesis of water-dispersible, cationic-thiolate protected fluorescent Au NPs by the sputtering of Au into liquid matrix containing thiolate ligands. By controlling mercaptan concentration the size and photophysical characteristics of Au NPs were directly controlled, resulting in near IR fluorescence with a 0.9% of absolute quantum yield. Cationically charged fluorescent metal NPs are promising, especially in biological fields, and this work provides a novel methodology towards the synthesis of a new series of functional metal NPs.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 米澤 徹

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