• SCIENTIFIC HIGHLIGHTS

Chemical control over the energy-level alignment in a two-terminal junction

Chemical control over the energy-level alignment in a two-terminal junction

Scientific Highlights Materials for information science and electronics 06 September 2016 4354 hits jags

Li YuanCarlos FrancoNúria CrivillersMarta Mas-TorrentLiang CaoC. S. Suchand SangeethConcepció RoviraJaume Veciana & Christian A. NijhuisNature Communications 7, Article number: 12066 (2016); doi:10.1038/ncomms12066

The energy-level alignment of molecular transistors can be controlled by external gating to move molecular orbitals with respect to the Fermi levels of the source and drain electrodes. Two-terminal molecular tunnelling junctions, however, lack a gate electrode and suffer from Fermi-level pinning, making it difficult to control the energy-level alignment of the system. Here we report an enhancement of 2 orders of magnitude of the tunnelling current in a two-terminal junction via chemical molecular orbital control, changing chemically the molecular component between a stable radical and its non-radical form without altering the supramolecular structure of the junction. Our findings demonstrate that the energy-level alignment in self-assembled monolayer-based junctions can be regulated by purely chemical modifications, which seems an attractive alternative to control the electrical properties of two-terminal junctions.

Related Topics: Materials for information science and electronics

Also on ICMAB...

  •  NANBIOSIS renews its accreditation as ICTS

    NANBIOSIS renews its accreditation as ICTS

    Information
    19 November 2018 77 hit(s)
    On Tuesday, 6 November, the "Consejo de Política Científica, Tecnológica y de Innovación" (CPTI) from the Spanish Ministry of Science, Innovation and Universities updated the new Map of the Singular S...
  • Congratulations to Dr. Francesc Bejarano, new ICMAB graduate!

    Congratulations to Dr. Francesc Bejarano, new ICMAB graduate!

    Information
    31 October 2018 212 hit(s)
    Congratulations to Dr. Francesc Bejarano from the the NANOMOL group for successfully defending hid PhD Thesis on molecular conductors and switches for electronics at ICMAB! Francesc defended his PhD T...
  • Congratulations to Dr. Antonio Campos, new ICMAB graduate!

    Congratulations to Dr. Antonio Campos, new ICMAB graduate!

    Information
    15 October 2018 247 hit(s)
    Congratulations to Dr. Antonio Campos from the the NANOMOL group for successfully defending hid PhD Thesis on organic field-effect transistors at ICMAB! Antonio defended his PhD Thesis, supervised by...

Search

Your experience on this site will be improved by allowing cookies Cookie Settings