Martin Magnusson
deputy head of department
Gold nanoparticles : Production, reshaping, and thermal charging
Author
Summary, in English
Gold nanoparticles are of great interest for various nanoelectronic applications, e.g., for making single electron transistors or very fine leads to molecular size entities. For this and other applications, it is important that all particles have controllable size and shape. In this paper, we describe the production of size-selected gold aerosol particles in the 20 nm range made by evaporation in a high-temperature tube furnace and subsequent size selection. To obtain spherical particles, it was necessary to reshape the particles at high temperature, which was investigated for temperatures between 25°C and 1200°C. High-resolution transmission electron microscopy showed that the degree of crystallinity became higher for higher reshaping temperature. During reshaping at high temperature, an anomalous charging behavior was discovered, whereby negatively as well as positively charged particles became multiply negatively charged. Possible mechanisms for explaining this thermally activated phenomenon are discussed.
Department/s
- Solid State Physics
Publishing year
1999-01-01
Language
English
Pages
243-251
Publication/Series
Journal of Nanoparticle Research
Volume
1
Issue
2
Document type
Journal article
Publisher
Springer
Topic
- Materials Chemistry
Keywords
- Gold
- Nanoparticles
- Particle synthesis
- Size selection
- Thermal charging
Status
Published
Research group
- Inorganic Chemistry Group, Ebbe Nordlander
ISBN/ISSN/Other
- ISSN: 1388-0764