Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Knut Deppert

Knut Deppert

Professor

Knut Deppert

Nanoparticles: Characterization and exposure metrics

Author

  • Linus Ludvigsson

Summary, in English

Exposure to aerosol nanoparticles has always been present in the evolution of humans, and thus has the human body

developed ways of dealing with particles that enters the body. However with the emerging nanotech industry, new

types of nanoparticles are being produced and used. Many of these particles have properties never seen before and this

rise concern about how exposure to them might cause unwanted health effects. The research field of occupational

health tends to move slower than the field of materials research. This is apparent when it comes to nanomaterials. The

old exposure metrics based on mass is most likely not the best one to use for new materials such as carbon nanotubes

(CNTs). In most applications only a few percent would be expected to be nanomaterials and the mass based methods

often not that specific. Standards which rely on conventional optical microscopy have severe limits in resolution and

won't be of any use when trying to detect, for example, release of single strands of CNTs.

To get a better understanding of the possible adverse health effects of nanoparticle it is necessary to investigate a

simpler system to isolate the importance of different factors, such as surface area. Understanding of the fundamental

processes responsible of the outcome from aerosol processes generating these model particles need to be well

understood to get the full picture of the model particles.

In this thesis, work that aims to improve the understanding of exposure to nanomaterials is presented. Electron

microscopy has been used in a systematic manner to detect nanomaterial, and a novel way of quantifying the detected

material has been developed. Synergistic combinations of measurement methods from field measurements are shown,

and methods for characterization of model particles are presented.

Department/s

  • Solid State Physics
  • Nanometer structure consortium (nmC)-lup-obsolete
  • NanoLund

Publishing year

2014

Language

English

Document type

Licentiate thesis

Topic

  • Condensed Matter Physics

Keywords

  • SEM
  • TEM
  • Nanoparticles
  • Aerosols
  • occupational exposure
  • CNTs
  • Fysicumarkivet A:2014:Ludvigsson

Status

Published

Research group

  • Nanometer structure consortium (nmC)-lup-obsolete

Supervisor

  • Knut Deppert
  • Maria Messing
  • Joakim Pagels
  • Jenny Rissler

ISBN/ISSN/Other

  • ISBN: 978-91-7623-217-0 (Print)
  • ISBN: 978-91-7623-218-7 (PDF)