A self-terminated electrochemical fabrication of electrode pairs with angstrom-sized gaps

Xiang, Juan; Liu, Bin; Liu, Bo; Ren, Bin; Zhang, Tian

doi:10.1016/j.elecom.2006.02.002

Cited by 12 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the one hand, diffusion and adsorption of several molecules onto quantum wires are not easy to control with the present experiment. On the other hand, with an atomic level study, the atomic configuration changes of the quantum wire upon adsorption of sample molecules would not always be consistent with macro expectations that had also been found by other groups [17,18].…”

Section: Interactions Of Ascorbic Acid Molecules With Fe Quantum Wirecontrasting

confidence: 69%

Study of the surface structure of Fe quantum wire prepared by electrochemical method in solution

Yu¹,

Xia²,

Dong³

2020

ScienceAsia

View full text Add to dashboard Cite

The surface structural characteristics of Fe quantum wires prepared by two electrochemical methods in solution were studied by their conductance changes caused by the interactions between the quantum wires and specific molecules. Once ascorbic acid was added into the solution, the conductance of the Fe junction decreased to a lower value while for the dopamine adsorption, the conductance showed no obvious change. We proposed that there were some iron(II) ions on the surface of atomic-scale Fe junction, not iron(III) ions, and these iron(II) ions played a significant role for the conductance change. This mechanism was further enhanced by the following two experiments. When exposing the quantum wire to sodium borohydride, the conductance increased to a higher value, and the conductance increase was also observed with an electrochemical reduction process, which provided additional evidence for the proposed mechanism.

show abstract

Section: Interactions Of Ascorbic Acid Molecules With Fe Quantum Wirecontrasting

confidence: 69%

Study of the surface structure of Fe quantum wire prepared by electrochemical method in solution

Yu¹,

Xia²,

Dong³

2020

ScienceAsia

View full text Add to dashboard Cite

show abstract

“…This is followed by a slower, self-terminating chronopotentiometric step with tunnelling feedback control ( Fig. 2a) 22,32 . A constant preset current I set was applied between the nanoelectrodes, with one being a quasi-reference counter electrode (QRCE), and the other a working electrode (WE), on which the gold deposition occurred.…”

Section: Resultsmentioning

confidence: 99%

Combined quantum tunnelling and dielectrophoretic trapping for molecular analysis at ultra-low analyte concentrations

et al. 2021

View full text Add to dashboard Cite

Quantum tunnelling offers a unique opportunity to study nanoscale objects with atomic resolution using electrical readout. However, practical implementation is impeded by the lack of simple, stable probes, that are required for successful operation. Existing platforms offer low throughput and operate in a limited range of analyte concentrations, as there is no active control to transport molecules to the sensor. We report on a standalone tunnelling probe based on double-barrelled capillary nanoelectrodes that do not require a conductive substrate to operate unlike other techniques, such as scanning tunnelling microscopy. These probes can be used to efficiently operate in solution environments and detect single molecules, including mononucleotides, oligonucleotides, and proteins. The probes are simple to fabricate, exhibit remarkable stability, and can be combined with dielectrophoretic trapping, enabling active analyte transport to the tunnelling sensor. The latter allows for up to 5-orders of magnitude increase in event detection rates and sub-femtomolar sensitivity.

show abstract

“…This current control method has been used to fabricate electrode pairs with distinct angstromsized gaps. 19 To achieve a 1D model, we approximate the shape of the growing filament as a cylinder with a constant radius. In a microscopic picture, the filament will have some curvature, and deposition might take place at the very top as well as at the sides.…”

Section: Simulation Modelmentioning

confidence: 99%

Simulation of multilevel switching in electrochemical metallization memory cells

Menzel

Böttger

Waser

2012

Journal of Applied Physics

161

132

View full text Add to dashboard Cite

We report on a simulation model for bipolar resistive switching in cation-migration based memristive devices. The model is based on the electrochemical driven growth and dissolution of a metallic filament. The origin of multilevel switching is proposed to be direct tunneling between the growing filament and the counter electrode. An important result of our parameter simulation studies is that different materials show the same experimental multilevel behavior. Our model fully reproduces the experimental data and allows for an explanation of the transition from bipolar to nonpolar switching.

show abstract

A self-terminated electrochemical fabrication of electrode pairs with angstrom-sized gaps

Cited by 12 publications

References 17 publications

Study of the surface structure of Fe quantum wire prepared by electrochemical method in solution

Study of the surface structure of Fe quantum wire prepared by electrochemical method in solution

Combined quantum tunnelling and dielectrophoretic trapping for molecular analysis at ultra-low analyte concentrations

Simulation of multilevel switching in electrochemical metallization memory cells

Contact Info

Product

Resources

About