Interfacial Synthesis of Dendritic Platinum Nanoshells Templated on Benzene Nanodroplets Stabilized in Water by a Photocatalytic Lipoporphyrin

详细信息    查看全文

• 作者：Haorong Wang ; Yujiang Song ; Craig J. Medforth ; and John A. Shelnutt
• 刊名：Journal of the American Chemical Society
• 出版年：2006
• 出版时间：July 26, 2006
• 年：2006
• 卷：128
• 期：29
• 页码：9284 - 9285
• 全文大小：226K
• 年卷期：v.128,no.29(July 26, 2006)
• ISSN：1520-5126

文摘

Nanoscale metal shells have many potential uses and in some applications offer significant advantages over nanoparticles. The synthesis of platinum nanoshells using stabilized nanodroplets of benzene in water as growth templates is described; the nanodroplets are stabilized by a surfactant-like tin(IV)-porphyrin complex localized at the benzene-water interface. The porphyrin also acts as a photocatalyst that reduces the platinum complex and deposits metal onto the nanodroplets to form dendritic metal nanoshells. Below the solubility limit of benzene in water, the lipoporphyrin-stabilized nanodroplets have a reproducible number, size distribution, and surface area, which allows the thickness of the platinum shell walls to be controlled by changing the amount of platinum complex. Nanoscale platinum shells with magnetic interiors can be made by dispersing Fe₃O₄ nanoparticles in the benzene nanodroplets.