Electrostatic-assembly metallized nanoparticles network by DNA template.

Journal Article (Journal Article)

Eighteen-nanometer gold and 3.5-nm silver colloidal particles closely packed by cetyltrimethylammonium bromide (CTAB) to form its positively charged shell. The DNA network was formed on a mica substrate firstly. Later, CTAB-capped gold or silver colloidal solutions were cast onto DNA network surface. It was found that the gold or silver nanoparticles metallized networks were formed owing to the electrostatic-driven template assembling of positive charge of CTAB-capped gold and silver particles on the negatively charged phosphate groups of DNA molecules by the characterizations of AFM, XPS and UV-vis. This method may provide a novel and simple way to studying nanoparticles assembly conjugating DNA molecules and offer some potential promising applications in nanocatalysis, nanoelectronics, and nanosensor on the basis of the fabricated metal nanoparticles network.

Full Text

Duke Authors

Cited Authors

  • Wu, A; Cheng, W; Li, Z; Jiang, J; Wang, E

Published Date

  • January 15, 2006

Published In

Volume / Issue

  • 68 / 3

Start / End Page

  • 693 - 699

PubMed ID

  • 18970377

Electronic International Standard Serial Number (EISSN)

  • 1873-3573

Digital Object Identifier (DOI)

  • 10.1016/j.talanta.2005.05.024

Language

  • eng

Conference Location

  • Netherlands