An In-Depth Study of Redox-Induced Conformational Changes in Charge Transport Characteristics of a Ferrocene-Alkanethiolate Molecular Electronic Junction: Temperature-Dependent Transition Voltage Spectroscopy Analysis

作者：Jeong Hyunhak; Jang Yeonsik; Kim Dongku; Hwang Wang Taek; Kim Jun Woo; Lee Takhee

来源：Journal of Physical Chemistry C, 2016, 120(6): 3564-3572.

DOI：10.1021/acs.jpcc.5b12440

We studied the temperature-dependent electrical properties of ferrocene-alkanethiolate molecular electronic junctions fabricated by a conventional solid-state device technique using a conducting polymer poly(3,4-ethylenedioxythiophene) stabilized with a poly(4-styrenesulfonic acid) (known as PEDOT:PSS) interlayer. We had previously observed unusual temperature-dependent electrical characteristics at a voltage polarity larger than +0.6 V and at temperatures higher than similar to 220 K (see Adv. Funct. Mater. 2014, 24, 2472). The origin of this distinctive behavior was ascribed to redox-induced conformational changes of the ferrocene-alkanethiolate molecules. We performed temperature dependent transition voltage spectroscopy analysis based on the multibarrier tunneling model to support the proposed redox-induced conformational changes observed in the ferrocene-alkanethiolate molecular junctions. The obtained results were consistent with the unusual thermal characteristics of.the ferrocene-alkanethiolate molecular junctions predicted by the proposed redox-induced conformational changes of the molecules.

• 出版日期2016-2-18