상세정보
학술지
Rose Bengal Dye on Thiol-Terminated Bilayer for Molecular Devices
- 발행일
- 200704
- 출처
- Langmuir, v.23 no.9, pp.5195-5199
- ISSN
- 0743-7463
- 출판사
- American Chemical Society(ACS)
- 협약과제
- 06SB1400, 기능성 분자메모리 소재 개발 및 소자구현 연구, 이효영
- 초록
- Recently, it has become increasingly important to control molecular layers, especially with regard to the formation of bilayers, in order to avoid electrical shorts in molecular electronics. In this paper, we report on the characterization of an in situ thiol-terminated bilayer that is formed by hydrogen bonding between the amine group of an aminoalkanethiol monolayer on a gold surface and the free amine group of aminoalkanethiolates in a bulk solution. We also report on the use of a rose bengal (RB) monolayer on a thiol-terminated bilayer for the purpose of application in a molecular memory device. Using surface-sensitive techniques such as grazing angle Fourier transform infrared (FT-IR) spectroscopy, quartz crystal microbalance (QCM) measurement, ellipsometry, X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV), we characterized a thiol-terminated bilayer (TUA-AUT) and an RB functionalized monolayer on a bilayered surface (RB-TUA-AUT). For a control experiment, we prepared a single RB monolayer attached by an ethanethiol group to a gold surface. In order to assess the feasibility of the present approach with respect to application in molecular electronics, we tested the switching property of the self-assembled monolayers (SAMs) using conducting-probe atomic force microscopy (CP-AFM). The RB monolayer on the bilayered surface exhibited hysteresis, while a single RB monolayer gave an electrical short. © 2007 American Chemical Society.
- KSP 제안 키워드
- Amine group, Atomic force microscope(AFM), CP-AFM, Control experiment, Cyclic voltammetry, Fourier Transform Infrared Spectroscopy(FTIR), Fourier transform infrared (FT-IR) spectroscopy, Gold surface, Hydrogen Bonding, Molecular electronics, Rose Bengal dye