Journalartikel

Jahr der Veröffentlichung: 2014

Seiten: 4877-

Zeitschrift: Nature Communications

Bandnummer: 5

Open Access Status: Hybrid

DOI Link: https://doi.org/10.1038/ncomms5877

Verlag: Nature Research

Abstract: 

The unimolecular rectifier is a fundamental building block of molecular
electronics. Rectification in single molecules can arise from electron
transfer between molecular orbitals displaying asymmetric spatial charge
distributions, akin to p–n junction diodes in semiconductors. Here we
report a novel all-hydrocarbon molecular rectifier consisting of a
diamantane–C₆₀ conjugate. By linking both sp³ (diamondoid) and sp²
(fullerene) carbon allotropes, this hybrid molecule opposingly pairs
negative and positive electron affinities. The single-molecule
conductances of self-assembled domains on Au(111), probed by
low-temperature scanning tunnelling microscopy and spectroscopy, reveal a
large rectifying response of the molecular constructs. This specific
electronic behaviour is postulated to originate from the electrostatic
repulsion of diamantane–C₆₀ molecules due to positively
charged terminal hydrogen atoms on the diamondoid interacting with the
top electrode (scanning tip) at various bias voltages. Density
functional theory computations scrutinize the electronic and vibrational
spectroscopic fingerprints of this unique molecular structure and
corroborate the unconventional rectification mechanism.

Harvard-Zitierstil: Randel, J., Niestemski, F., Botello-Mendez, A., Mar, W., Ndabashimiye, G., melinte, S., et al. (2014) Unconventional molecule-resolved current rectification in diamondoid–fullerene hybrids, Nature Communications, 5, p. 4877. https://doi.org/10.1038/ncomms5877

APA-Zitierstil: Randel, J., Niestemski, F., Botello-Mendez, A., Mar, W., Ndabashimiye, G., melinte, S., Dahl, J., Carlson, R., Butova, E., Fokin, A., Schreiner, P., Charlier, J., & Manoharan, H. (2014). Unconventional molecule-resolved current rectification in diamondoid–fullerene hybrids. Nature Communications. 5, 4877. https://doi.org/10.1038/ncomms5877