Ferrocene-1,1′-dithiol as molecular wire between Ag electrodes: The role of surface defects

Bredow, Thomas; Tegenkamp, Christoph; Pfnür, H.; Meyer, John‐Jules Ch.; Maslyuk, V. T.; Mertig, Ingrid

doi:10.1063/1.2827867

Cited by 12 publications

(12 citation statements)

References 31 publications

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“…[3] Thin films based on Fc derivatives have also been successfully demonstrated as part of transistors, [4] in redox batteries, [5] switchable surfaces, [6] rectification, [7] memory devices, [8] molecular switches, [9] and molecular wires. [10] The microscopic arrangement of the Fc derivatives in the corresponding film is very vital in controlling the charge transport and electronic properties. Therefore, understanding and controlling the microscopic structure or arrangements of the molecules in the film is very important.…”

Section: Introductionmentioning

confidence: 99%

“…Films of Fc derivatives are demonstrated as suitable materials for charge transport at interfaces, [2] and electrodes [3] . Thin films based on Fc derivatives have also been successfully demonstrated as part of transistors, [4] in redox batteries, [5] switchable surfaces, [6] rectification, [7] memory devices, [8] molecular switches, [9] and molecular wires [10] …”

Section: Introductionmentioning

confidence: 99%

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Solvent‐ and Temperature‐Dependent Assembly in Monolayer Films of a Ferrocene‐Naphthyridine Hybrid on HOPG

Malik

Saha

Patra

et al. 2021

Chemistry An Asian Journal

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The formation of a monolayer film of bis-naphthyridyl ferrocene on highly oriented pyrolytic graphite (HOPG) at ambient conditions is demonstrated. The films are prepared by drop casting from different solvents. The microscopic structure of the films is understood using atomic force microscopy (AFM) and scanning tunnelling microscopy (STM). The analysis reveals two different types of Phases (I and II) in the films and the relative percentage of these phases depends on the nature of the solvents used for the preparation and the thermodynamical condition. Solvents like methanol, acetonitrile and DMF exclusively select Phase-I, whereas acetone and ethanol show a mix of both phases at room temperature. The different phases are formed by different conformers of the molecule. We also show that the selectivity of one of the phases over the other is related to the difference in the energetics for the formation of these phases.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solvent‐ and Temperature‐Dependent Assembly in Monolayer Films of a Ferrocene‐Naphthyridine Hybrid on HOPG

Malik

Saha

Patra

et al. 2021

Chemistry An Asian Journal

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“…A molecular wire, containing ferrocene as the central functional molecular unit, has been reported to exhibit remarkably high conductance in comparison to an organic wire of similar length without ferrocene unit . Most recent research with ferrocene as functional unit has been done with thiols as end groups and noble metals as electrode materials, such as Ag or Au . The Au‐thiol bond is known to be strong and very robust, and several experiments have been carried out with this combination .…”

Section: Introductionmentioning

confidence: 99%

Charge Transport through Ferrocene 1,1′‐Diamine Single‐Molecule Junctions

Kanthasamy

Ring

Nettelroth

et al. 2016

Small

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The charge transport through ferrocene 1,1′‐diamine (FDA) molecules between gold electrodes is investigated using the mechanically controllable break junction technique combined with a theoretical framework of density functional theory simulations to understand the physics of these molecular junctions. The characteristic conductances of the molecule are measured at low bias as well as current–voltage (IV) characteristics. By fitting the IV characteristics to the single‐level model, the values for the position of the molecular level, mainly responsible for the transport, and its coupling to the leads, are obtained. The influence of the binding sites, molecular conformation, and electrode distance are systematically studied from a theoretical perspective. While a strong dependence of conductance on the adsorption geometry is found, the decrease of conductance as a function of electrode distance arises mainly from a decrease of coupling strength of the molecular electronic orbitals through a reduced overlap and, to a lesser extent, from a shift of their alignment with respect to the Fermi energy.

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“…Electroactive ligands (reducing/oxidizing species) like ferrocene ,,− and cobaltocene have been studied for applications that include photoexcited hole conductors and photoredox systems. In previous reports, ferrocene was anchored to the surface of the NCs through hydrocarbon spacers with alkyl chains length of 3–12 carbon units. , It was suggested by theory and simulations , and experimentally , that the hole transfer rate from the photoexcited NCs surface (donor) to the ferrocene moiety (acceptor) depends on the hydrocarbon spacer length. The donor–acceptor charge transfer rate constant decreases exponentially with increasing donor–acceptor bridge distance. ,, In addition, complete removal of organic ligands through ligand exchange processes is difficult.…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of CdSe Nanocrystals with Electroactive Ligands

et al. 2016

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We report the synthesis and characterization of cadmium selenide nanocrystals with electro-active ligands directly attached to the surface. The conventional surfactant-assisted synthesis yields nanocrystals with surfaces functionalized with insulating organic ligands. These insulating ligands act as a barrier for charge transport between nanocrystals. Electro-active (reducing/oxidizing) ligands like ferrocene and cobaltocene have potential for applications as photo-excited hole conductors and photoredox systems. Although ferrocene ligands anchored to the nanocrystal surface through insulating long-chain hydrocarbon spacers have previously been reported, this approach is limited because the charge transfer between nanocrystal and ferrocene is highly sensitive to their separation. We report here ferrocene directly bound to the inorganic core of the nanocrystal and as a result the distance between the nanocrystals and the electroactive moiety is minimized. Graphic: CdSe nanocrystals are prepared directly with their surfaces passivated by electro-active ligands like ferrocene phosphine and phosphinoxide derivatives.

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Ferrocene-1,1′-dithiol as molecular wire between Ag electrodes: The role of surface defects

Cited by 12 publications

References 31 publications

Solvent‐ and Temperature‐Dependent Assembly in Monolayer Films of a Ferrocene‐Naphthyridine Hybrid on HOPG

Solvent‐ and Temperature‐Dependent Assembly in Monolayer Films of a Ferrocene‐Naphthyridine Hybrid on HOPG

Charge Transport through Ferrocene 1,1′‐Diamine Single‐Molecule Junctions

Direct Synthesis of CdSe Nanocrystals with Electroactive Ligands

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