Water-Dissolvable Sodium Sulfate Nanowires as a Versatile Template for the Fabrication of Polyelectrolyte- and Metal-Based Nanotubes

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• 作者：Ying-Chih Pu ; Jih Ru Hwu ; Wu-Chou Su ; Dar-Bin Shieh ; Yonhua Tzeng ; Chen-Sheng Yeh
• 刊名：Journal of the American Chemical Society
• 出版年：2006
• 出版时间：September 6, 2006
• 年：2006
• 卷：128
• 期：35
• 页码：11606 - 11611
• 全文大小：550K
• 年卷期：v.128,no.35(September 6, 2006)
• ISSN：1520-5126

文摘

This study presents the synthesis of water-dissolvable sodium sulfate nanowires, where Na₂SO₄ nanowires were produced by an easy reflux process in an organic solvent, N,N-dimethylformamide(DMF) and formed from the coexistence of AgNO₃, SnCl₂, dodecylsodium sulfate (SDS), and cetyltrimethylammonium bromide (CTAB). Na₂SO₄ nanowires were derived from SDS, and the morphology controlof the Na₂SO₄ nanowires was established by the cooperative effects of Sn and NO₃^-, while CTAB servedas the template and led to homogeneous nanowires with a smooth surface. Since the as-synthesized sodiumsulfate nanowires are readily dissolved in water, these nanowires can be treated as soft templates for thefabrication of nanotubes by removing the Na₂SO₄ core. This process is therefore significantly better thanother reported methodologies to remove the templates under harsh condition. We have demonstrated thepreparation of biocompatible polyelectrolyte (PE) nanotubes using a layer-by-layer (LbL) method on theNa₂SO₄ nanowires and the formation of Au nanotubes by the self-assembly of Au nanoparticles. In bothnanotube synthesis processes, PEI (polyethylenimine), PAA (poly(acrylic acid)), and Au nanoparticles servedas the building blocks on the Na₂SO₄ templates, which were then rinsed with water to remove the coretemplates. This unique water-dissolvable template is anticipated to bring about versatile and flexibledownstream applications.