Electron transport in self-assembled polymer molecular junctions
2006 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 96, no 2, 027801- p.Article in journal (Refereed) Published
A molecular junction of a poly(p-phenyleneethynylene)s derivative with thioacetate end groups (TA-PPE) was fabricated by self-assembling. Nanogap electrodes made by electroplating technique was used to couple thiol end groups of TA-PPE molecules. Room temperature current-voltage characteristics of the molecular junction exhibited highly periodic, repeatable, and identical stepwise features. First-principles calculations suggest that one possibility for the equidistant step is due to the opening of different conducting channels that corresponds to the unoccupied molecular orbitals of the polymer in the junction. It is interesting to see that an 18 nm long polymer is of quantized electronic structures and behaves like a quantum transport device.
Place, publisher, year, edition, pages
2006. Vol. 96, no 2, 027801- p.
Electrodes; Electroplating; Molecular dynamics; Nanostructured materials; Polymers; Self assembly; Current-voltage; Molecular junction; Quantized electronic structures; Thioacetate end groups (TA-PPE); Electron transport properties
Biochemistry and Molecular Biology
IdentifiersURN: urn:nbn:se:kth:diva-6986DOI: 10.1103/PhysRevLett.96.027801ISI: 000234758100098ScopusID: 2-s2.0-32644481386OAI: oai:DiVA.org:kth-6986DiVA: diva2:11853
QC 20100730. Titeln ändrad från "Coherent electron transport in self-assembled conjugated polymer molecular junctions".2007-04-172007-04-172010-12-03Bibliographically approved