We report on a new approach for controlling the electrical properties of graphene by the introduction of a highly ordered array of DNA-grafted gold nanoparticles. The arrangement of these nanoparticles was highly influenced by the surface wetting properties of graphene. With different graphene UV-irradiation times, the ordered domain size of nanoparticles increased, which, in turn, affected the electrical properties of graphene. Upon measuring the electrical properties using graphene field effect transistors, the ambipolar characteristics of graphene (Dirac point voltage of ~20 V) only appeared when a large area of graphene was covered by the monolayer of hexagonal, close-packed gold nanoparticles, resulting in the n-doping of graphene. It is conceivable that a new way of modulating graphene properties can provide beneficial information and can be used for relevant future applications.
Bibliographical noteFunding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (NRF-2014R1A1A2054027). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2016R1D1A1B03931903). This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (NRF-2015R1A2A2A04005445).
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ASJC Scopus subject areas
- General Chemistry
- Biomedical Engineering
- General Materials Science
- Condensed Matter Physics