Br-Assisted Ostwald Ripening of Au Nanoparticles under H2O2 Redox

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• 作者：Eunji Jang ; Eun-Kyung Lim ; Jihye Choi ; Joseph Park ; Yong-Jung Huh ; Jin-Suck Suh ; Yong-Min Huh ; Seungjoo Haam
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：January 1, 2012
• 年：2012
• 卷：12
• 期：1
• 页码：37-39
• 全文大小：232K
• 年卷期：v.12,no.1(January 1, 2012)
• ISSN：1528-7505

文摘

In nanomaterials synthesis, Ostwald ripening is a postsynthetic problem that is one obstacle for common utilization of nanomaterials. Herein, we report an unprecedented Ostwald ripening mechanism resulting from the simple combination of hydrogen peroxide (H₂O₂) and cetyltrimethylammonium bromide (CTAB)-stabilized gold nanoparticles (AuNPs) at room temperature. In this ripening process, H₂O₂ redox induces simultaneous dissolution and growth of AuNPs where bromide (Br^{鈥?/sup>) from CTAB helps to form AuBr₂鈥?/sup> in aqueous solution at room temperature. This understanding will provide basic strategies for advanced designs and development of various nanomaterials.}