Au colloid monolayers as templates for nanostructure assembly

Bonnie E. Baker, Michael J. Natan, Hong Zhu, Thomas P. Beebe

Research output: Contribution to journalArticlepeer-review


A new approach to nanostructure formation based on replication of an existing pattern of colloidal Au nanoparticles is described. The key steps in this strategy involve the coating of a well-defined Au colloid monolayer with an SiOx sol-gel, HF etching until colloidal particles are exposed, and removal of colloidal Au with aqua regia. This process was carried out on a two-dimensional array of 12nm diameter particles on an In-doped SnO2 (ITO) substrate, and monitored by UV-vis, electrochemistry, and atomic force microscopy (AFM). AFM data indicate the strategy is feasible, with clearly visible differences in surface morphology observed between bare ITO and colloidal Au-depleted, SiOx-coated ITO.

Original languageEnglish
Pages (from-to)147-154
Number of pages8
JournalSupramolecular Science
Issue number1-2
StatePublished - 1997
Externally publishedYes

Bibliographical note

Funding Information:
We acknowledgep artial support of this work from the Beckman Foundation and from the National Science Foundation (CHE-9256692)A. cknowledgemenits also made to the Electron Microscopy Facility for the Life Sciencesin the BiotechnologyI nstitutea t The Pennsylvania StateU niversity.W e thank Andy Hooper of the Allara group for XPS spectra.


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