Microscale Golden Candock Leaves Self-Aggregated on a Polymer Surface: Raman Scattering Enhancement and Superhydrophobicity

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• 作者：Wei-Kang Wang ; Mei-Ling Zheng ; Wei-Qiang Chen ; Feng Jin ; Yao-Yu Cao ; Zhen-Sheng Zhao ; Xuan-Ming Duan
• 刊名：Langmuir
• 出版年：2011
• 出版时间：April 5, 2011
• 年：2011
• 卷：27
• 期：7
• 页码：3249-3253
• 全文大小：882K
• 年卷期：v.27,no.7(April 5, 2011)
• ISSN：1520-5827

文摘

Gold nanoparticles (AuNP鈥檚) prepared through a controllable synthesis and aggregation process are attractive for their unique properties that arise from their surface plasmon resonances (SPRs). However, aggregation-controlled AuNP鈥檚 on amorphous surfaces have not been well explored. In this study, we present a simple in situ synthesis method for preparing AuNP鈥檚 in which the AuNP鈥檚 self-aggregate into microscale Candock-leaf-like structures on a polyelectrolyte film (PEF) surface. In this approach, the PEF plays an important role in adsorbing and storing AuCl₄^{鈭?/sup> as well as in controlling the release speed of AuCl₄鈭?/sup> in the preparation process. The mechanism for forming these Candock-leaf-like structures has been illustrated by both the growth process of gold nanoparticles and the Ostwald ripenning of the aggregations. AuNP鈥檚 with a unique structure exhibited significantly enhanced surface Raman scattering and strong superhydrophobicity.}