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Cumulene Wires Display Increasing Conductance with Increasing Length

Journal Article · · Nano Letters
 [1];  [2];  [3];  [2];  [4];  [2];  [2];  [2]
  1. Columbia University, New York, NY (United States); Chinese Academy of Sciences (CAS), Beijing (China); Columbia University
  2. Columbia University, New York, NY (United States)
  3. Columbia University, New York, NY (United States); Shanghai University of Electric Power (China)
  4. Shanghai University of Electric Power (China)
One-dimensional sp-hybridized carbon wires, including cumulenes and polyynes, can be regarded as finite versions of carbynes. They are likely to be good candidates for molecular-scale conducting wires as they are predicted to have a high-conductance. In this study, we first characterize the single-molecule conductance of a series of cumulenes and polyynes with a backbone ranging in length from 4 to 8 carbon atoms, including [7]cumulene, the longest cumulenic carbon wire studied to date for molecular electronics. We observe different length dependence of conductance when comparing these two forms of carbon wires. Polyynes exhibit conductance decays with increasing molecular length, while cumulenes show a conductance increase with increasing molecular length. Their distinct conducting behaviors are attributed to their different bond length alternation, which is supported by theoretical calculations. Furthermore, this study confirms the long-standing theoretical predictions on sp-hybridized carbon wires and demonstrates that cumulenes can form highly conducting molecular wires.
Research Organization:
Columbia University, New York, NY (United States)
Sponsoring Organization:
National Science Foundation (NSF); Natural Science Foundation of Shanghai; USDOE
Grant/Contract Number:
SC0019440
OSTI ID:
2202959
Alternate ID(s):
OSTI ID: 1853249
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 11 Vol. 20; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (36)

A study on the structure and electrical properties of the fourth carbon allotrope: carbyne journal October 1997
Synthesis and Structure of Tetraarylcumulenes: Characterization of Bond-Length Alternation versus Molecule Length journal January 2013
Unusual Length Dependence of the Conductance in Cumulene Molecular Wires journal June 2019
Polyacetylene, VI. Mitteil.): Umwandlung von Polyinen in Kumulene journal September 1954
Polyynes vs. Cumulenes: Their Possible Use as Molecular Wires journal February 2005
Oriented carbyne layers journal January 1992
One-dimensional conjugated carbyne - synthesis and properties journal January 1987
Ab initio molecular simulations with numeric atom-centered orbitals journal November 2009
Efficient integration for all-electron electronic structure calculation using numeric basis functions journal December 2009
Odd [ n ]Cumulenes ( n = 3, 5, 7, 9): Synthesis, Characterization, and Reactivity journal May 2017
Solvent Dependence of the Single Molecule Conductance of Oligoyne-Based Molecular Wires journal December 2015
Reverse Bond-Length Alternation in Cumulenes: Candidates for Increasing Electronic Transmission with Length journal August 2018
Near Length-Independent Conductance in Polymethine Molecular Wires journal September 2018
Spin-Polarized Electron Transport Across Metal–Organic Molecules: A Density Functional Theory Approach journal May 2013
Ab Initio Calculation of Vibrational Absorption and Circular Dichroism Spectra Using Density Functional Force Fields journal November 1994
Single-Molecule Conductance of Functionalized Oligoynes: Length Dependence and Junction Evolution journal August 2013
Frustrated Rotations in Single-Molecule Junctions journal August 2009
Oligoyne Single Molecule Wires journal November 2009
Bond Length Alternation and Energy Band Gap of Polyyne journal July 2006
Environmental Control of Single-Molecule Junction Transport journal May 2011
Carbyne from First Principles: Chain of C Atoms, a Nanorod or a Nanorope journal October 2013
Dependence of single-molecule junction conductance on molecular conformation journal August 2006
Directing isomerization reactions of cumulenes with electric fields journal October 2019
Synthesis and properties of long [ n ]cumulenes ( n ≥ 5) journal January 2014
Quantum chemistry calculations for molecules coupled to reservoirs: Formalism, implementation, and application to benzenedithiol journal May 2007
Density‐functional thermochemistry. III. The role of exact exchange journal April 1993
DFT approach on stability and conductance of nine different polyyne and cumulene molecules journal April 2019
Non-trivial length dependence of the conductance and negative differential resistance in atomic molecular wires journal October 2008
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density journal January 1988
Zero-bias molecular electronics: Exchange-correlation corrections to Landauer's formula journal March 2006
Cumulene molecular wire conductance from first principles journal March 2010
Unusual Conductance of Polyyne-Based Molecular Wires journal March 2007
VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data journal October 2011
Carbyne with finite length: The one-dimensional sp carbon journal October 2015
Measurement of Single-Molecule Resistance by Repeated Formation of Molecular Junctions journal August 2003
Accurate spin-dependent electron liquid correlation energies for local spin density calculations: a critical analysis journal August 1980

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