Orientation of molecular interface dipole on metal surface investigated by noncontact atomic force microscopyReport as inadecuate

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Chinese Science Bulletin

, Volume 58, Issue 30, pp 3630–3635

First Online: 15 July 2013Received: 22 April 2013Accepted: 05 June 2013DOI: 10.1007-s11434-013-5977-x

Cite this article as: Yuan, B., Chen, P., Zhang, J. et al. Chin. Sci. Bull. 2013 58: 3630. doi:10.1007-s11434-013-5977-x


We investigated the orientations of interface dipole moments of individual non-planar titanyl phthalocyanine TiOPc molecules on Cu111 and Cu100 substrates using scanning tunneling microscope STM and noncontact atomic force microscope NC-AFM. The dipole moment orientations corresponding to two different configurations of individual TiOPc molecules were determined unambiguously. The correlation between the actual molecular structures and the corresponding STM topographies is proposed based on the sub-molecular resolution imaging and local contact potential difference LCPD measurements. Comparing with the pristine substrate, the LCPD shift due to the adsorption of non-planar molecule is dependent on the permanent molecular dipole, the charge transfer between the surface and the molecule, and the molecular configurations. This work would shed light on tailoring interfacial electronic properties and controlling local physical properties via polar molecule adsorption.

Keywordstitanyl phthalocyanine interface dipole non-contact atomic force microscopy scanning tunneling microscopy Kelvin probe force microscopy This article is published with open access at Springerlink.com

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Author: BingKai Yuan - PengCheng Chen - Jun Zhang - ZhiHai Cheng - XiaoHui Qiu - Chen Wang

Source: https://link.springer.com/

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