Single-molecule circuits with well-defined molecular conductance

Nano Letters
Latha VenkataramanMichael L Steigerwald

Abstract

We measure the conductance of amine-terminated molecules by breaking Au point contacts in a molecular solution at room temperature. We find that the variability of the observed conductance for the diamine molecule-Au junctions is much less than the variability for diisonitrile- and dithiol-Au junctions. This narrow distribution enables unambiguous conductance measurements of single molecules. For an alkane diamine series with 2-8 carbon atoms in the hydrocarbon chain, our results show a systematic trend in the conductance from which we extract a tunneling decay constant of 0.91 +/- 0.03 per methylene group. We hypothesize that the diamine link binds preferentially to undercoordinated Au atoms in the junction. This is supported by density functional theory-based calculations that show the amine binding to a gold adatom with sufficient angular flexibility for easy junction formation but well-defined electronic coupling of the N lone pair to the Au. Therefore, the amine linkage leads to well-defined conductance measurements of a single molecule junction in a statistical study.

Citations

Nov 10, 2009·The Journal of Chemical Physics·D S Kosov
Jun 3, 2010·The Review of Scientific Instruments·K LämmleR Wiesendanger
Jan 10, 2013·The Journal of Chemical Physics·Chang Min Kim, John Bechhoefer
Jan 26, 2010·The Journal of Chemical Physics·Carmen HerrmannMark A Ratner
Jan 10, 2013·The Journal of Chemical Physics·Ante Bilić, Stefano Sanvito
Feb 2, 2011·The Journal of Chemical Physics·Alan A Dzhioev, D S Kosov
Oct 16, 2007·The Journal of Chemical Physics·Rui LiuHarold U Baranger
Feb 12, 2015·The Journal of Chemical Physics·Kanchan UlmanAnna Delin
Jul 2, 2010·The Journal of Chemical Physics·Hongmei LiuNing Li
Mar 20, 2012·The Journal of Chemical Physics·Meilin BaiShimin Hou
Jan 22, 2013·Annual Review of Physical Chemistry·Bala Krishna PathemPaul S Weiss
Sep 29, 2011·European Biophysics Journal : EBJ·Paweł SpólnikIrena Roterman
May 18, 2013·Nanoscale Research Letters·Carlos R ArroyoHerre Sj van der Zant
Mar 23, 2012·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Andres Castellanos-GomezGabino Rubio-Bollinger
Feb 10, 2016·Nano Letters·M A KarimiE Scheer
May 10, 2007·Journal of the American Chemical Society·Jordan R QuinnRonald Breslow
Jan 9, 2016·Scientific Reports·Peter NirmalrajHeike Riel
Dec 27, 2011·Bioelectrochemistry·Joanna Juhaniewicz, Slawomir Sek
Jul 17, 2015·Journal of the American Chemical Society·Michael S InkpenTim Albrecht
Sep 25, 2015·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Veronika ObersteinerEgbert Zojer
Mar 5, 2016·Accounts of Chemical Research·Mark S Hybertsen, Latha Venkataraman
Oct 22, 2008·Biophysical Chemistry·Ines Delfino, Salvatore Cannistraro
Dec 9, 2015·Journal of Chemical Theory and Computation·Wendu DingVictor S Batista
Mar 17, 2016·Chemical Reviews·Dong XiangXuefeng Guo
Mar 24, 2016·The Journal of Chemical Physics·Jacob LykkeboGemma C Solomon
Aug 20, 2015·Journal of the American Chemical Society·Sara SangtarashColin J Lambert
Dec 23, 2014·Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology·Jacob K RosensteinKenneth L Shepard
Jun 7, 2015·Annual Review of Analytical Chemistry·Richard J Nichols, Simon J Higgins
May 8, 2015·Chemical Reviews·Robert M Metzger

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