MRS Proceedings

Table of Contents - Volume  1217  - Symposium Y – Catalytic Materials for Energy, Green Processes and Nanotechnology  

Articles

Assembly and Interfacial Effects in Hybrid Nanostructures of Zinc Oxide and Gold

2009 MRS Fall Meeting.

Daisuke Itoa1, Lallie C McKenziea1, Keiichiro Masukoa3 and James E Hutchisona4

a1 daisukeb.ito@jp.sony.com, University of Oregon, Nanoscience Open Research Initiative and Materials Science Institute, Eugene, Oregon, United States

a2 lmckenzi@uoregon.edu, University of Oregon, Nanoscience Open Research Initiative and Materials Science Institute, Eugene, Oregon, United States

a3 kmasuko@uoregon.edu, University of Oregon, Nanoscience Open Research Initiative and Materials Science Institute, Eugene, Oregon, United States

a4 hutch@uoregon.edu, University of Oregon, Nanoscience Open Research Initiative and Materials Science Institute, Eugene, Oregon, United States

Abstract

Gold nanoparticles were linked to ZnO films and nanowires using phosphonic and carboxylic acid ligands. TEM and STEM-HAADF characterization showed that gold nanoparticles modified with both types of ligands anchored on ZnO nanowire surfaces as well as on ZnO films. After removing the ligands from the interface between ZnO nanowires and supported gold nanoparticles, the electric conductivity in the presence of methanol vapor increased by 100 times as compared to the bare ZnO nanowire, which suggested enhanced-catalytic effects due to the hybrid structure. In addition, ZnO/Au nanomaterials were synthesized by linking ZnO nanoparticles and carboxylate-functionalized gold nanoparticles in solution. UV-vis characterization showed both the bandgap absorption from ZnO and the plasmon absorption from gold nanoparticles. Formation of hybrid nanosystems like these using organic ligands as linkers not only can lead to materials with enhanced properties but also minimize the waste of precious elements because the assembly process is an additive, rather than subtractive, process.

(Received November 19 2009)

(Accepted December 30 2009)

Key Words

  • colloid;
  • nanostructure;
  • self-assembly
0Comments
Related Content