Pulling and Stretching a Molecular Wire to Tune its Conductance
نویسندگان
چکیده
منابع مشابه
Pulling and Stretching a Molecular Wire to Tune its Conductance.
A scanning tunnelling microscope is used to pull a polythiophene wire from a Au(111) surface while measuring the current traversing the junction. Abrupt current increases measured during the lifting procedure are associated with the detachment of molecular subunits, in apparent contradiction with the expected exponential decrease of the conductance with wire length. Ab initio simulations reprod...
متن کاملAb Initio Electrical Conductance of a Molecular Wire
A method is developed for computing the direct current and alternating current conductance of molecular wires at small bias. The basic ingredients are: linear response theory, time-dependent density functional theory, imaginary potentials, and a jellium model for the metallic leads. The theory is capable of incorporating the effect of realistic charge distributions in the system and electron–el...
متن کاملConductance of a biomolecular wire.
Carotenoids (Car) act as "wires" that discharge unwanted electrons in the reaction center of higher plants. One step in this "side-path" electron conduction is thought to be mediated by Car oxidation. We have carried out direct measurements of the conductance of single-Car molecules under potential control in a membrane-mimicking environment, and we found that when Car are oxidized conductance ...
متن کاملConductance of a Molecular Wire Attached to Mesoscopic Leads: Contact Effects
We study linear electron transport through a molecular wire sandwiched between nanotube leads. We show that the presence of such electrodes strongly influences the calculated conductance. We find that depending on the quality and geometry of the contacts between the molecule and the tubular reservoirs, linear transport can be tuned between an effective Newns spectral behavior and a more structu...
متن کاملConductance in a periodically doped quantum wire
Abstract In this paper we will give a short rewiew about the conductance of a mesoscopic waveguide strip with a few impurities. Green-function method is used allowing to treat systems with low number of impurities, not only the completly clean case. Investigating a wire containing Diracdelta potentials (modelling the impurities) we found that increasing number of impurities can cause a transiti...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Physical Chemistry Letters
سال: 2015
ISSN: 1948-7185
DOI: 10.1021/acs.jpclett.5b01283