Local Molecular Desorption-induced Carrier Density Modulation in Graphene Measured Using Nitrogen Vacancy Centers in Nanodiamonds
Abstract
We investigate photoinduced carrier modulation in graphene field-effect transistors by measuring the local Oersted magnetic field using nitrogen vacancy centers in nanodiamonds. The observed change in the Oersted magnetic field during measurement is attributed to laser-induced molecular desorption, which creates a local carrier density gradient in the graphene channel. This result is consistent with the laser-induced variations in the electronic transport properties. The method employed in this study enables visualization of local molecular adsorption-desorption dynamics with higher spatial resolution than conventional optical techniques, which are limited by the diffraction limit of light.
Fields of Study & Subjects
Graphene research and applications
Diamond and Carbon-based Materials Research
Force Microscopy Techniques and Applications
Publication details
- Journal / source
- e-Journal of Surface Science and Nanotechnology
- Volume
- 24
- Issue
- 1
- Pages
- 7–12
- Publication date
- 6 February 2026
- Language
- EN