Substrate Dependence in the Growth of Three-Dimensional Gold Nanoparticle Superlattices

Abstract

Three-dimensional superlattices consisting of gold nanoparticles were grown at air/suspension or suspension/solid interfaces. The growth of superlattices was found to be strongly dependent on substrate materials: Micrometer-sized superlattices were grown at air/suspension interfaces and upon silver substrates, whereas no growth was observed on silicon, silicon oxide or amorphous carbon substrates. To explain the observed substrate dependence, Lifshitz theory was used to calculate the Hamaker constants between gold nanoparticle assemblies and substrates through the suspension. Van der Waals interactions estimated from this calculation fully explain the experimental results.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2001
Accession Number
ADP012229

Entities

People

  • H. Yao
  • K. Kimura
  • N. Yamamoto
  • S. Sato

Organizations

  • University of Minnesota College of Science and Engineering

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aqueous Solutions
  • Assembly
  • Band Structures
  • Diameters
  • Dielectric Permittivity
  • Dielectrics
  • Electron Microscopes
  • Electrons
  • Hydrophilic Properties
  • Hydrophobic Properties
  • Materials
  • Metallic Nanoparticles
  • Nanocomposites
  • Nanoparticles
  • Scanning Electron Microscopes
  • Self Assembly
  • Three Dimensional

Readers

  • Fluid Dynamics.
  • Nanofabrication and Microfabrication.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Biotechnology