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

Department of Chemistry

18 Citations (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.

Original language	English
Article number	30
Journal	Journal of the American Chemical Society
Volume	139
Pages (from-to)	10212-10215
Number of pages	4
ISSN	0002-7863
DOIs	https://doi.org/10.1021/jacs.7b05599
Publication status	Published - 2 Aug 2017

Access to Document

10.1021/jacs.7b05599

Cite this

@article{bfb1a3f674c84aa0935727a0b42ae6c2,

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",

year = "2017",

month = aug,

day = "2",

doi = "10.1021/jacs.7b05599",

language = "English",

volume = "139",

pages = "10212--10215",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "ACS Publications",

}

TY - JOUR

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

C2 - 28702995

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

Access to Document

Fingerprint

Cite this