Adjusting the electronic properties and gas reactivity of epitaxial graphene by thin surface metallization
2014 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, Vol. 439, 105-108 p.Article in journal (Refereed) Published
Graphene-based chemical gas sensors normally show ultra-high sensitivity to certain gas molecules but at the same time suffer from poor selectivity and slow response and recovery Limes. Several approaches based on functionalization or modification of the graphene surface have been demonstrated as means to improve these issues, but most such measures result in poor reproducibility. In this study we investigate reproducible graphene surface modifications by sputter deposition of thin nanostructured Au or Pt layers. It is demonstrated that under the right metallization conditions the electronic properties of the surface remain those of graphene, while the surface chemistry is modified to improve sensitivity, selectivity and speed of response to nitrogen dioxide.
Place, publisher, year, edition, pages
Elsevier , 2014. Vol. 439, 105-108 p.
Epitaxial graphene on SiC; Surface modifications; Gas sensor
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-105566DOI: 10.1016/j.physb.2013.11.009ISI: 000331620700023OAI: oai:DiVA.org:liu-105566DiVA: diva2:708872