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STM investigation of porphyrin isomers on metal substrates
T. Terui,T. Kamikado,Y. Okuno,H. Suzuki,S. Mashiko 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
We performed scanning tunneling microscopy (STM) experiments on mono- or sub-monolayer deposited porphyrin moleculeson metal substrates. We observed substitution-dependent structure changes of the molecules. Obtaining STM images of thestructure and arrangement of functional molecules would contribute valuable information towards creation of nano-molecular-devices. scanning probe microscopy (SPM) shows the greatest potential for reaching this goal, at present. STM is able to obtainimages with nano-meter resolution of molecules on metal surfaces. These high-resolution images reveal the molecular structure andarrangement of the molecules on the surface and contain information about the moleculesubstrate interaction and the moleculemolecule interaction. STM will be useful for the assembly of nano-devices made from molecules on a substrate.