Inelastic electron tunneling spectroscopy of difurylethene-based photochromic single-molecule junctions

Beilstein Journal of Nanotechnology

Youngsang Kim¹  Dmytro Sysoiev²  Thomas Huhn²  Fabian Pauly³  Elke Scheer³  Safa G. Bahoosh³ 

[1] Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;Department of Chemistry, University of Konstanz, 78457 Konstanz, Germany;Department of Physics, University of Konstanz, 78457 Konstanz, Germany;

关键词: inelastic electron tunneling spectroscopy;    molecular junction;    photochromic;    single molecule;   

DOI  :  10.3762/bjnano.8.261

来源: DOAJ

【 摘 要 】

Diarylethene-derived molecules alter their electronic structure upon transformation between the open and closed forms of the diarylethene core, when exposed to ultraviolet (UV) or visible light. This transformation results in a significant variation of electrical conductance and vibrational properties of corresponding molecular junctions. We report here a combined experimental and theoretical analysis of charge transport through diarylethene-derived single-molecule devices, which are created using the mechanically controlled break-junction technique. Inelastic electron tunneling (IET) spectroscopy measurements performed at 4.2 K are compared with first-principles calculations in the two distinct forms of diarylethenes connected to gold electrodes. The combined approach clearly demonstrates that the IET spectra of single-molecule junctions show specific vibrational features that can be used to identify different isomeric molecular states by transport experiments.

【 授权许可】

Unknown