• Jens Sejlund Jensen
  • Thomas Gam Mikkelstrup
4. term, Nanotechnology, Master (Master Programme)
This project examines the most common methods of growing carbon nanotubes, with focus on their use in photodetectors. It mainly deals with the chemical vapour deposition method of nanotube growth, but other methods are described as well. The theory behind the geometry and band structure of carbon nanotubes is discussed, along with the basic theory behind metal-semiconductor-metal photodiodes. The photocurrent mechanisms for carbon nanotubes is investigated. Furthermore the theory behind characterization of carbon nanotubes using Raman spectroscopy is also included.
Carbon nanotubes are grown through chemical vapour deposition and are then characterised using scanning electron microscopy, atomic force microscopy, absorbance spectroscopy and Raman spectroscopy. While nanotubes were produced during experiments, no samples were ever of high enough quality for use in photodetectors, so samples were produced with nanotubes bought from mkNANO instead. The bought nanotubes were exfoliated and deposited on various samples and electrical contacts were created with a direct-write UV-lithography system, followed by current-voltage characteristics and photocurrent measurements.
SpecialisationNanophysics and -materials
Publication date14 Jun 2016
Number of pages101
ID: 235326654