3D-TEM characterization of metal nanoparticle-disp ersed amorphous Si-O composite

Yumi H. Ikuhara, Kenta Yoshida, Tomohiro Saito, Seiji Takahashi, Tsukasa Hirayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Two dimensional (2D) and three dimensional (3D) microstructures of metal nanoparticledispersed amorphous silica (Si-O) prepared by chemical solution process were observed using high angle annular dark field STEM (HAADF-STEM). In this study, the nickel nanoparticles in Si-O matrix were precisely studied on the relationship between microstructure and hydrogen affinity of the particles at high temperature. Total surface area of the Ni nanoparticles in Si-O was evaluated from average particle size derived from the particle size distribution of 2D HAADF-STEM images of powders with different metal contents. Amount of reversively adsorbed hydrogen on the interface of the nanoparticles and Si-O matrix for the samples were calculated using these data. Evaluated amount of adsorbed hydrogen was linearly increased and corresponds with the experimentally obtained result when the nanoparticles ideally dispersed in Si-O matrix with lower Ni contents. From 3D HAADF-STEM images, agglomerated particles were located on the surface of the composites, which results in decreasing the amount of reversible adsorbed hydrogen. Thus, it is thought that the reversible adsorption site was located at the interface of the Si-O and Ni nanoparticles.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition MS and T'08
Pages1146-1152
Number of pages7
Publication statusPublished - 2008
Externally publishedYes
EventMaterials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, United States
Duration: 2008 Oct 52008 Oct 9

Publication series

NameMaterials Science and Technology Conference and Exhibition, MS and T'08
Volume2

Other

OtherMaterials Science and Technology Conference and Exhibition, MS and T'08
CountryUnited States
CityPittsburgh, PA
Period08/10/508/10/9

Keywords

  • Composite
  • Hydrogen
  • Nickel
  • Silica
  • TEM

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials

Fingerprint Dive into the research topics of '3D-TEM characterization of metal nanoparticle-disp ersed amorphous Si-O composite'. Together they form a unique fingerprint.

Cite this