Characterization of four different bipolar charging devices for nanoparticle charge conditioning

Autor(en)

Peter Kallinger, Gerhard Steiner, Wladyslaw Szymanski

Abstrakt

Well-defined charge conditioning of nanoparticles is a prerequisite for a number of particle measuring techniques. We investigated two different soft X-ray devices (custom-built and TSI advanced aerosol neutralizer) an AC-corona discharge device (MSP electrical ionizer) and a radioactivity based Am-241 charger as a reference. Electrical mobility size distributions of positive and negative ions created in all devices were determined and their applicability for particle charging examined. The mobility spectra of the positive ions were found to be quite comparable for all chargers with a mean mobility of 1.50-1.60 cm(2) V-1 s(-1), whereas the spectra of the negative ions show differences in morphology leading to a broader range of mean mobilities (1.68-2.09 cm(2) V-1 s(-1)). However, results confirm that under the selected experimental conditions the charge equilibrium related to bipolar diffusion charging process was obtained in all charging devices.

Organisation(en)

Aerosolphysik und Umweltphysik

Journal

Journal of Nanoparticle Research: an interdisciplinary forum for nanoscale science and technology

Band

14

Anzahl der Seiten

8

ISSN

1388-0764

DOI

https://doi.org/10.1007/s11051-012-0944-z

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/615b7265-a0e8-4299-baad-83f4245551dc