uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Precursor-Less Coating of Nanoparticles in the Gas Phase
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
Show others and affiliations
2015 (English)In: Materials, ISSN 1996-1944, Vol. 8, no 3, 1027-1042 p.Article in journal (Refereed) Published
Abstract [en]

This article introduces a continuous, gas-phase method for depositing thin metallic coatings onto (nano)particles using a type of physical vapor deposition (PVD) at ambient pressure and temperature. An aerosol of core particles is mixed with a metal vapor cloud formed by spark ablation by passing the aerosol through the spark zone using a hollow electrode configuration. The mixing process rapidly quenches the vapor, which condenses onto the core particles at a timescale of several tens of milliseconds in a manner that can be modeled as bimodal coagulation. Gold was deposited onto core nanoparticles consisting of silver or polystyrene latex, and silver was deposited onto gold nanoparticles. The coating morphology depends on the relative surface energies of the core and coating materials, similar to the growth mechanisms known for thin films: a coating made of a substance having a high surface energy typically results in a patchy coverage, while a coating material with a low surface energy will normally "wet" the surface of a core particle. The coated particles remain gas-borne, allowing further processing.

Place, publisher, year, edition, pages
2015. Vol. 8, no 3, 1027-1042 p.
National Category
Chemical Sciences
URN: urn:nbn:se:uu:diva-252026DOI: 10.3390/ma8031027ISI: 000351945400013OAI: oai:DiVA.org:uu-252026DiVA: diva2:809165
Available from: 2015-04-30 Created: 2015-04-28 Last updated: 2015-04-30Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Valvo, Mario
By organisation
Structural Chemistry
In the same journal
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 406 hits
ReferencesLink to record
Permanent link

Direct link