Non-exponential tunneling in water near an electrode

A. Vaught; T. W. Jing; Stuart Lindsay

doi:10.1016/0009-2614(95)00223-Q

Non-exponential tunneling in water near an electrode

A. Vaught, T. W. Jing, Stuart Lindsay

CLAS-NS: Physics

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

We have measured the inverse decay length (κ) for tunneling in water between a Pt-Ir tip and an Au(111) surface. At 10⁹ Ω κ = 0.92 ± 0.16 Å^-1 (Au negative), almost independent of electrochemical potential. An unexpected drop is observed as the gap resistance is reduced below 10⁸ Ω. The tunnel gap at 10⁹ Ω is about 20 Å, 12 Å more than predicted by ab initio calculations. It is Ohmic for resistances between 10⁹ and 10⁶ Ω and voltages less than 0.1 V, implying that sharp resonances do not play a role.

Original language	English (US)
Pages (from-to)	306-310
Number of pages	5
Journal	Chemical Physics Letters
Volume	236
Issue number	3
DOIs	https://doi.org/10.1016/0009-2614(95)00223-Q
State	Published - Apr 13 1995

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Non-exponential tunneling in water near an electrode",

abstract = "We have measured the inverse decay length (κ) for tunneling in water between a Pt-Ir tip and an Au(111) surface. At 109 Ω κ = 0.92 ± 0.16 {\AA}-1 (Au negative), almost independent of electrochemical potential. An unexpected drop is observed as the gap resistance is reduced below 108 Ω. The tunnel gap at 109 Ω is about 20 {\AA}, 12 {\AA} more than predicted by ab initio calculations. It is Ohmic for resistances between 109 and 106 Ω and voltages less than 0.1 V, implying that sharp resonances do not play a role.",

author = "A. Vaught and Jing, {T. W.} and Stuart Lindsay",

year = "1995",

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doi = "10.1016/0009-2614(95)00223-Q",

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T1 - Non-exponential tunneling in water near an electrode

AU - Vaught, A.

AU - Jing, T. W.

AU - Lindsay, Stuart

PY - 1995/4/13

Y1 - 1995/4/13

N2 - We have measured the inverse decay length (κ) for tunneling in water between a Pt-Ir tip and an Au(111) surface. At 109 Ω κ = 0.92 ± 0.16 Å-1 (Au negative), almost independent of electrochemical potential. An unexpected drop is observed as the gap resistance is reduced below 108 Ω. The tunnel gap at 109 Ω is about 20 Å, 12 Å more than predicted by ab initio calculations. It is Ohmic for resistances between 109 and 106 Ω and voltages less than 0.1 V, implying that sharp resonances do not play a role.

AB - We have measured the inverse decay length (κ) for tunneling in water between a Pt-Ir tip and an Au(111) surface. At 109 Ω κ = 0.92 ± 0.16 Å-1 (Au negative), almost independent of electrochemical potential. An unexpected drop is observed as the gap resistance is reduced below 108 Ω. The tunnel gap at 109 Ω is about 20 Å, 12 Å more than predicted by ab initio calculations. It is Ohmic for resistances between 109 and 106 Ω and voltages less than 0.1 V, implying that sharp resonances do not play a role.

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EP - 310

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

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