Elucidating the Role of Molecule-Electrode Interfacial Defects in Charge Tunneling Characteristics of Large-area Junctions

Extra Form
author Hyo Jae Yoon
Homepage https://hyojaeyoon.wixsite.com/omml
journal J. Am. Chem. Soc., Just Accepted Manuscript DOI: 10.1021/jacs.8b08146


PrevPrev Article

NextNext Article


+ - Up Down Comment Print



공규돈.jpg                               Junji Jin.jpg

                                             Gyu Don Kong(박사과정)                       Junji Jin(석사과정) 



Interfacial chemistry at organic-inorganic contact critically determines function of a wide range of molecular and organic electronic devices and other systems. The chemistry is, however, difficult to understand due to the lack of easily accessible in-operando spectroscopic techniques that permit access to interfacial structure on a molecular scale. Herein we compare two analogous junctions formed with identical organic thin film and different liquid top-contacts (water droplet vs. eutectic gallium indium alloy) and elucidate the puzzling interfacial characteristics. Specifically, we fine-tune the surface topography of the organic surface using mixed self-assembled monolayers (SAMs): single component SAM composed of rectifier (2,2’-bipyridyl-terminated n-undecanethiolate; denoted as SC11BIPY) is systematically diluted with non-rectifying n-alkanethiolates of different lengths (denoted as SCn where n=8, 10, 12, 14, 16, 18). Characterization of the resulting mixed SAMs in wettability and tunneling currents with the two separate liquid top-contacts allow us to investigate the role of phase segregation and gauche defect in the SAM//liquid interfaces. The results reported here show the difference in length between SC11BIPY and SCn is translated into nanoscopic pits and gauche-conformer defects on the surface, and the difference in contact force—hydrostatic vs. user pressures—and hence conformity of contact accounts for the difference in wettability and rectification behaviors. Our work provides an insight into the role of molecule-electrode interfacial defects in performance of molecular-scale electronic devices.











1 2 3 4 5 6 7 8

Designed by sketchbooks.co.kr / sketchbook5 board skin

나눔글꼴 설치 안내

이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 Cancel

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5