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Phys Rev Lett. 2005 Jan 21;94(2):026803. Epub 2005 Jan 19.

Molecules on insulating films: scanning-tunneling microscopy imaging of individual molecular orbitals.

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IBM Research, Zurich Research Laboratory, CH-8803 Rüschlikon, Switzerland.


Ultrathin insulating NaCl films have been employed to decouple individual pentacene molecules electronically from the metallic substrate. This allows the inherent electronic structure of the free molecule to be preserved and studied by means of low-temperature scanning-tunneling microscopy. Thereby direct images of the unperturbed molecular orbitals of the individual pentacene molecules are obtained. Elastic scattering quantum chemistry calculations substantiate the experimental findings.

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