Size induced structural changes in molybdenum oxide nanoparticles

Troels Lindahl Christiansen, Espen D. Bøjesen, Mikkel Juelsholt, Joanne Etheridge, Kirsten M.Ø. Jensen

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

Nanosizing of metal oxide particles is a common strategy for improving materials properties; however, small particles often take structures different from the bulk material. MoO2 nanoparticles show a structure that is distinct from the bulk distorted rutile structure and which has not yet been determined. Here, we present a model for nanostructured MoO2 obtained through detailed atomic pair distribution function analysis combined with high-resolution electron microscopy. Defects occur in the arrangement of [MoO6] octahedra, in both large (40-100 nm) nanoparticles, where the overall distorted rutile structure is preserved, and in small nanoparticles (<5 nm), where a new nanostructure is formed. The study provides a piece in the puzzle of understanding the structure/properties relationship of molybdenum oxides and further our understanding of the origin of structural changes taking place upon nanosizing in oxide materials.

Original languageEnglish
Pages (from-to)8725-8735
Number of pages11
JournalACS Nano
Volume13
Issue number8
DOIs
Publication statusPublished - 30 Jul 2019

Keywords

  • high resolution electron microscopy
  • molybdenum oxide
  • nanoparticles
  • nanostructures
  • pair distribution function analysis
  • structural characterization
  • total scattering

Cite this

Christiansen, T. L., Bøjesen, E. D., Juelsholt, M., Etheridge, J., & Jensen, K. M. Ø. (2019). Size induced structural changes in molybdenum oxide nanoparticles. ACS Nano, 13(8), 8725-8735. https://doi.org/10.1021/acsnano.9b01367