K W Hipps - Temperature Independence of Orbital Mediated Tunneling in Cobalt(II) Phthalocyanine

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  Publication Details (including relevant citation   information):

  Gyarfas, Brett, Wiggins, Bryan, Hipps, K. W. The Journal of   Physical Chemistry C 2010 114 (31)   13349-13353

  Abstract: The effect of a large (∼200 K)   temperature change on orbital mediated electron tunneling spectra   is measured for the first time. Tunneling spectra obtained from   CoPc throughout the 300 to 100 K region show no definitive change   in integrated intensity. The integrated intensity of the Pc ring   LUMO normalized tunneling band, d ln(I)/d ln(V)−V, is 0.28 ± 0.04   V. The ring **** and cobalt metal centered orbitals are not   separately resolved and give a total integrated intensity of 0.24   ± 0.04 V. Significant temperature dependence was observed in the   I(V) curves of bare and CoPc covered Au(111) and is primarily   attributed to a change in the work function with temperature and   the associated change in tip−sample separation at fixed set   point.

  Address (URL): http://dx.doi.org/10.1021/jp105230u