Identification of vibrational signatures from short chains of interlinked molecule-nanoparticle junctions obtained by inelastic electron tunnelling spectroscopy
2013 (English)In: Nanoscale, ISSN 2040-3364, Vol. 5, no 11, 4673-4677 p.Article in journal (Refereed) Published
Short chains containing a series of metal-molecule-nanoparticle nanojunctions are a nano-material system with the potential to give electrical signatures close to those from single molecule experiments while enabling us to build portable devices on a chip. Inelastic electron tunnelling spectroscopy (IETS) measurements provide one of the most characteristic electrical signals of single and few molecules. In interlinked molecule-nanoparticle (NP) chains containing typically 5-7 molecules in a chain, the spectrum is expected to be a superposition of the vibrational signatures of individual molecules. We have established a stable and reproducible molecule-AuNP multi-junction by placing a few 1,8-octanedithiol (ODT) molecules onto a versatile and portable nanoparticle-nanoelectrode platform and measured for the first time vibrational molecular signatures at complex and coupled few-molecule-NP junctions. From quantum transport calculations, we model the IETS spectra and identify vibrational modes as well as the number of molecules contributing to the electron transport in the measured spectra.
Place, publisher, year, edition, pages
2013. Vol. 5, no 11, 4673-4677 p.
IdentifiersURN: urn:nbn:se:kth:diva-124065DOI: 10.1039/c3nr00505dISI: 000319008700011ScopusID: 2-s2.0-84878138732OAI: oai:DiVA.org:kth-124065DiVA: diva2:632991
FunderSwedish Research Council
QC 201306262013-06-262013-06-252013-06-26Bibliographically approved