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Electrical Rectification by a Monolayer of Hexadecylquinolinium Tricyanoquinodimethanide Sandwiched between Gold Electrodes

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Abstract

Unimolecular rectification, previously reported between oxide-bearing electrodes, was detected between oxide-free Au electrodes for a Langmuir-Blodgett monolayer of the zwitterionic D+-p-A- molecule hexadecylquinolinium tricyanoquinodimethanide, C16H33Q-3CNQ. The top gold electrode was deposited from a Au vapor pre-cooled by multiple collisions with Ar atoms. The maximum rectification ratio is 27.5 at 2.2 Volts (the average rectification ratio is 7.55). The currents are as large as 9.04 × 104 electrons molecule-1 s-1. The result reinforces previous work with oxide-bearing Al electrodes, but the currents with Au electrodes are larger by three to five orders of magnitude.

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Authors and Affiliations

  1. Laboratory for Molecular Electronics, Chemistry Department, The University of Alabama, Tuscaloosa, AL, 35487-033, USA

    Robert M. Metzger

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  1. Robert M. Metzger
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Metzger, R.M. Electrical Rectification by a Monolayer of Hexadecylquinolinium Tricyanoquinodimethanide Sandwiched between Gold Electrodes. MRS Online Proceedings Library 636, 781981 (2000). https://doi.org/10.1557/PROC-636-D7.8.1/JJ9.8.1

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  • DOI: https://doi.org/10.1557/PROC-636-D7.8.1/JJ9.8.1

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