Shukichi Tanaka et al 2004 Nanotechnology 15 S87 doi:10.1088/0957-4484/15/2/018
Shukichi Tanaka, Hitoshi Suzuki, Toshiya Kamikado and Shinro Mashiko
Show affiliationsTo control the interaction between tetrakis(3,5 di-t-butylphenyl)porphyrin (TBPP) molecules and substrates, 5-(4-methylthiophenyl)-10,15,20-tris(3,5-di-t-butylphenyl)porphyrin (MSTBPP) molecules were tailored; one of the four di-t-butylphenyl groups of TBPP molecules was replaced by a methylthiophenyl group. By means of non-contact atomic force microscopy (NC-AFM) operated in the force feedback control mode, the conformation of MSTBPP molecules deposited on an Au(111) substrate was investigated. It was found that the methylthiophenyl group introduced into the TBPP molecules enhanced the attractive interaction between the molecule and the substrate. This interaction seems to improve the spatial resolution of NC-AFM.
33.15.Bh General molecular conformation and symmetry; stereochemistry
Issue 2 (February 2004)
Received 26 August 2003, in final form 19 December 2003
Published 22 January 2004
Shukichi Tanaka et al 2004 Nanotechnology 15 S87
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