Ice Nucleation Activity of Graphene and Graphene Oxides

Research output: Contribution to journalArticleResearchpeer-review

Authors

  • Thomas Häusler
  • Paul Gebhardt
  • Daniel Iglesias
  • Silvia Marchesan
  • Dominik Eder
  • Hinrich Grothe

External Organisational units

  • Institute of Materials Science and Technology
  • University of Trieste

Abstract

Aerosols can act as cloud condensation nuclei and/or ice-nucleating particles (INPs), influencing cloud properties. In particular, INPs show a variety of different and complex mechanisms when interacting with water during the freezing process. To gain a fundamental understanding of the heterogeneous freezing mechanisms, studies with proxies for atmospheric INPs must be performed. Graphene and its derivatives offer suitable model systems for soot particles, which are ubiquitous aerosols in the atmosphere. In this work, we present an investigation of the ice nucleation activity (INA) of different types of graphene and graphene oxides. Immersion droplet freezing experiments as well as additional analytical analyses, such as X-ray photoelectron spectroscopy, Raman spectroscopy, and transmission electron microscopy, were performed. We show within a group of samples that a highly ordered graphene lattice (Raman G band intensity >50%) can support ice nucleation more effectively than a lowly ordered graphene lattice (Raman G band intensity

Details

Original languageEnglish
Pages (from-to)8182-8190
Number of pages9
JournalJournal of Physical Chemistry C
Volume122.2018
Issue number15
DOIs
Publication statusPublished - 1 Mar 2018
Externally publishedYes