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Selective Dissolution of the Silver Component in Colloidal Au and Ag Multilayers: A Facile Way to Prepare Nanoporous Gold Film Materials

Selective Dissolution of the Silver Component in Colloidal Au and Ag Multilayers: A Facile Way to Prepare Nanoporous Gold Film Materials

Yingxi Lu, Qifeng Wang, Junqi Sun, Jiacong Shen

Langmuir. 2005 May 24;21(11):5179-84.

PMID: 15896068

Abstract:

Colloidal Au/Ag multilayer films were prepared by alternate assembly of Au nanoparticles with a size of 5 +/- 1.2 nm and Ag nanoparticles with a size of 10 +/- 2.4 nm by using 1,5-pentanedithiol as cross-linker. Nanoporous gold films with a ligament size of 26.7 +/- 4.6 nm were then prepared by selective dissolution of sacrificial templates of silver particles in colloidal Au/Ag multilayers. The complete dissolution of Ag particles in colloidal Au/Ag multilayers in a mixture solution of 3.0 mM HAuCl(4) and 3 M NaCl took place at room temperature without damage of the colloidal Au film. This method to prepare nanoporous gold films was further extended to the preparation of nanoporous gold nanotubes by depositing colloidal Au/Ag film on the inner wall of anodic aluminum oxides (AAO) followed by dissolution of colloidal Ag and removal of AAO templates.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP928983	1,5-Pentanedithiol		928-98-3	Price

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