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Portrait of Ville Maisi. Photo: Kennet Ruona

Ville Maisi

Assistant Professor, Coordinator Quantum Physics

Portrait of Ville Maisi. Photo: Kennet Ruona

Coulomb blockade from the shell of an InP-InAs core-shell nanowire with a triangular cross section


  • D. J.O. Göransson
  • M. Heurlin
  • B. Dalelkhan
  • S. Abay
  • M. E. Messing
  • V. F. Maisi
  • M. T. Borgström
  • H. Q. Xu

Summary, in English

We report on growth of InP-InAs core-shell nanowires and demonstration of the formation of single quantum structures, which show the Coulomb blockade effect, over entire lengths of the nanowires. The core-shell nanowires are grown by a selective area growth technique via metal-organic vapor phase epitaxy. The as-grown core-shell nanowires are found to be of wurtzite crystals. The InP cores have a hexagonal cross section, while the InAs shells are grown preferentially on specific { 1 1 ¯ 00} facets, leading to the formation of the core-shell nanowires with an overall triangular cross section. The grown core-shell nanowires are transferred onto a Si/SiO
substrate and then contacted by several narrow metal electrodes. Low-temperature transport measurements show the Coulomb-blockade effect. We analyze the measured gate capacitance and single electron charging energy of the devices and demonstrate that a quantum structure which shows the Coulomb blockade effect of a many-electron quantum dot is formed over the full length of a single core-shell nanowire and consists of the entire InAs shell in the nanowire.


  • NanoLund: Center for Nanoscience
  • Solid State Physics

Publishing year





Applied Physics Letters





Document type

Journal article


American Institute of Physics (AIP)


  • Nano Technology
  • Condensed Matter Physics




  • ISSN: 0003-6951