Agglomerates and aggregates: Number and size of primary particles from in-situ mass-mobility measurements

M. L. Eggersdorfer, A. J. Groehn, C. M. Sorensen, P. H. McMurry, S. E. Pratsinis

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

Abstract

Rapid characterization of gas-borne nanoparticles is important for monitoring aerosol synthesis as well as environmental particle concentrations. Here, the formation of aggregates by viscous flow sintering of amorphous materials (silica, polymers) and grain boundary diffusion sintering of crystalline ceramics (titania, alumina) or metals (Ni, Fe, Ag etc.) is investigated by multiparticle sintering simulations. A scaling law is discovered between average aggregate projected area and equivalent number of constituent primary particles during sintering. This is a relation essentially independent of time, material properties and sintering mechanisms. So the surface area mean primary particle diameter is determined by (on-line) differential mobility analyzer (DMA) and aerosol particle mass (APM) analyzer measurements and this power law for aggregates. This is in good agreement with the primary particle diameter obtained by nitrogen adsorption.

Original languageEnglish (US)
Title of host publicationTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
Pages1-4
Number of pages4
StatePublished - Aug 20 2012
EventNanotechnology 2012: Advanced Materials, CNTs, Particles, Films and Composites - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012 - Santa Clara, CA, United States
Duration: Jun 18 2012Jun 21 2012

Publication series

NameTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012

Other

OtherNanotechnology 2012: Advanced Materials, CNTs, Particles, Films and Composites - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
Country/TerritoryUnited States
CitySanta Clara, CA
Period6/18/126/21/12

Keywords

  • Aerosol particle mass measurement
  • Differential mobility analyzer
  • Particle diameter
  • Specific surface area

Fingerprint

Dive into the research topics of 'Agglomerates and aggregates: Number and size of primary particles from in-situ mass-mobility measurements'. Together they form a unique fingerprint.

Cite this