Effect of different face centered cubic nanoparticle distributions on particle size and surface area determination: A theoretical study

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Giovanni Agostini - , University of Turin, European Synchrotron Radiation Facility (Autor:in)
  • Andrea Piovano - , ILL - Institut Laue-Langevin (Autor:in)
  • Luca Bertinetti - , Max Planck Institute of Colloids and Interfaces (Autor:in)
  • Riccardo Pellegrini - , Chimet (Autor:in)
  • Giuseppe Leofanti - (Autor:in)
  • Elena Groppo - , University of Turin (Autor:in)
  • Carlo Lamberti - , University of Turin, Southern Federal University (Autor:in)

Abstract

Nanoparticles research represents one of the most active fields in science due to the importance of nanosized materials in a wide variety of applications. Their characterization needs the comparison of data coming from different experimental techniques, but the peculiar properties of the nanosystem that each technique points out are not always properly taken into account and misleading results have been often reported. In this work, we generated transmission electron microscopy like (TEM-like) data to predict the extended X-ray absorption fine structure (EXAFS) and chemisorption-like typical outputs as the average coordination numbers up to fourth shell of the particles distribution and the surface area. The aim of the simulations is to explore the dependence of the calculated average coordination number (ACN) and average dispersion (AD) values from each parameter characterizing a particle size distribution (PSD), as the mean diameter, the width, the shape, and the profile, and shows that a range of distributions is compatible with given values of ACN and AD. In this way, we have established a general method to properly take into account the above-mentioned parameters and to allow for an accurate analysis and comparison of results. Furthermore, it will be shown that unfavorable distribution shape makes the comparison among techniques critical and potentially misleading if performed with an oversimplified model of the PSD such as those using the average diameter only.

Details

OriginalspracheEnglisch
Seiten (von - bis)4085-4094
Seitenumfang10
FachzeitschriftJournal of Physical Chemistry C, Nanomaterials and interfaces
Jahrgang118
Ausgabenummer8
PublikationsstatusVeröffentlicht - 27 Feb. 2014
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

ORCID /0000-0002-4666-9610/work/142238942