Adjusting the electronic properties and gas reactivity of epitaxial graphene by thin surface metallization

作者：Eriksson Jens^*; Puglisi Donatella; Kang Yu Hsuan; Yakimova Rositza; Spetz Anita Lloyd

来源：Physica B: Condensed Matter , 2014, 439: 105-108.

DOI：10.1016/j.physb.2013.11.009

• Epitaxial graphene on SiC
• Surface modifications
• Gas sensor

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.

• 出版日期2014-4-15