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