Extreme Conductance Suppression in Molecular Siloxanes

Haixing Li; Marc Hamilton Garner; Timothy A. Su; Anders Sjølund Jensen; Michael S.  Inkpen; Michael L. Steigerwald; Latha Venkataraman; Gemma C. Solomon; Colin Nuckolls

doi:10.1021/jacs.7b05599

Extreme Conductance Suppression in Molecular Siloxanes

Haixing Li, Marc Hamilton Garner, Timothy A. Su, Anders Sjølund Jensen, Michael S. Inkpen, Michael L. Steigerwald, Latha Venkataraman, Gemma C. Solomon, Colin Nuckolls

Kemisk Institut

18 Citationer (Scopus)

Abstract

Single-molecule conductance studies have traditionally focused on creating highly conducting molecular wires. However, progress in nanoscale electronics demands insulators just as it needs conductors. Here we describe the single-molecule length-dependent conductance properties of the classic silicon dioxide insulator. We synthesize molecular wires consisting of Si-O repeat units and measure their conductance through the scanning tunneling microscope-based break-junction method. These molecules yield conductance lower than alkanes of the same length and the largest length-dependent conductance decay of any molecular systems measured to date. We calculate single-molecule junction transmission and the complex band structure of the infinite 1D material for siloxane, in comparison with silane and alkane, and show that the large conductance decay is intrinsic to the nature of the Si-O bond. This work highlights the potential for siloxanes to function as molecular insulators in electronics.

Originalsprog	Engelsk
Artikelnummer	30
Tidsskrift	Journal of the American Chemical Society
Vol/bind	139
Sider (fra-til)	10212-10215
Antal sider	4
ISSN	0002-7863
DOI	https://doi.org/10.1021/jacs.7b05599
Status	Udgivet - 2 aug. 2017

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10.1021/jacs.7b05599

Citationsformater

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title = "Extreme Conductance Suppression in Molecular Siloxanes",

abstract = "Single-molecule conductance studies have traditionally focused on creating highly conducting molecular wires. However, progress in nanoscale electronics demands insulators just as it needs conductors. Here we describe the single-molecule length-dependent conductance properties of the classic silicon dioxide insulator. We synthesize molecular wires consisting of Si-O repeat units and measure their conductance through the scanning tunneling microscope-based break-junction method. These molecules yield conductance lower than alkanes of the same length and the largest length-dependent conductance decay of any molecular systems measured to date. We calculate single-molecule junction transmission and the complex band structure of the infinite 1D material for siloxane, in comparison with silane and alkane, and show that the large conductance decay is intrinsic to the nature of the Si-O bond. This work highlights the potential for siloxanes to function as molecular insulators in electronics.",

author = "Haixing Li and Garner, {Marc Hamilton} and Su, {Timothy A.} and Jensen, {Anders Sj{\o}lund} and Inkpen, {Michael S.} and Steigerwald, {Michael L.} and Latha Venkataraman and Solomon, {Gemma C.} and Colin Nuckolls",

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T1 - Extreme Conductance Suppression in Molecular Siloxanes

AU - Li, Haixing

AU - Garner, Marc Hamilton

AU - Su, Timothy A.

AU - Jensen, Anders Sjølund

AU - Inkpen, Michael S.

AU - Steigerwald, Michael L.

AU - Venkataraman, Latha

AU - Solomon, Gemma C.

AU - Nuckolls, Colin

PY - 2017/8/2

Y1 - 2017/8/2

N2 - Single-molecule conductance studies have traditionally focused on creating highly conducting molecular wires. However, progress in nanoscale electronics demands insulators just as it needs conductors. Here we describe the single-molecule length-dependent conductance properties of the classic silicon dioxide insulator. We synthesize molecular wires consisting of Si-O repeat units and measure their conductance through the scanning tunneling microscope-based break-junction method. These molecules yield conductance lower than alkanes of the same length and the largest length-dependent conductance decay of any molecular systems measured to date. We calculate single-molecule junction transmission and the complex band structure of the infinite 1D material for siloxane, in comparison with silane and alkane, and show that the large conductance decay is intrinsic to the nature of the Si-O bond. This work highlights the potential for siloxanes to function as molecular insulators in electronics.

AB - Single-molecule conductance studies have traditionally focused on creating highly conducting molecular wires. However, progress in nanoscale electronics demands insulators just as it needs conductors. Here we describe the single-molecule length-dependent conductance properties of the classic silicon dioxide insulator. We synthesize molecular wires consisting of Si-O repeat units and measure their conductance through the scanning tunneling microscope-based break-junction method. These molecules yield conductance lower than alkanes of the same length and the largest length-dependent conductance decay of any molecular systems measured to date. We calculate single-molecule junction transmission and the complex band structure of the infinite 1D material for siloxane, in comparison with silane and alkane, and show that the large conductance decay is intrinsic to the nature of the Si-O bond. This work highlights the potential for siloxanes to function as molecular insulators in electronics.

U2 - 10.1021/jacs.7b05599

DO - 10.1021/jacs.7b05599

M3 - Journal article

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SN - 0002-7863

VL - 139

SP - 10212

EP - 10215

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

M1 - 30

ER -

Extreme Conductance Suppression in Molecular Siloxanes

Abstract

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