基于表面的锂离子传感器：一种用自组装单分子层衍生化的电极。

Surface-based lithium ion sensor: An electrode derivatized with a self-assembled monolayer.

作者信息

Wanichacheva Nantanit, Soto Ernesto R, Lambert Christopher R, McGimpsey W Grant

机构信息

Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, Massachusetts 01609, USA.

出版信息

Anal Chem. 2006 Oct 15;78(20):7132-7. doi: 10.1021/ac0603429.

DOI:10.1021/ac0603429

PMID:17037912

Abstract

Self-assembled monolayers (SAMs) of 21-(16-mercaptohexadecan-1-oyl)-4,7,13,16-tetraoxa-1,10,21-triazabicyclo[8.8.5]tricosane-19,23-dione were prepared on gold. Characterization of the SAMs was carried out by sessile drop contact angle, ellipsometry, grazing angle FT-IR spectroscopy, and electrochemical techniques. The cation recognition properties of the SAM were studied by cyclic voltammetry and impedance spectroscopy. The films show moderate selectivity for detection of Li+ ions in solution over K+ and Na+, with selectivity values calculated to be log K(Li+,Na+) approximately -1.30 and log K(Li+,K+) approximately -0.92. To the best of our knowledge, this is the first demonstration of a lithium sensor fabricated using self-assembled monolayer technology.

摘要

在金表面制备了21-(16-巯基十六烷酰基)-4,7,13,16-四氧杂-1,10,21-三氮杂双环[8.8.5]二十三烷-19,23-二酮的自组装单分子层（SAMs）。通过静滴接触角、椭偏仪、掠角傅里叶变换红外光谱和电化学技术对SAMs进行了表征。通过循环伏安法和阻抗谱研究了SAM的阳离子识别特性。该薄膜对溶液中Li⁺离子的检测表现出对K⁺和Na⁺的适度选择性，计算得到的选择性值log K(Li⁺,Na⁺)约为 -1.30，log K(Li⁺,K⁺)约为 -0.92。据我们所知，这是首次展示使用自组装单分子层技术制造的锂传感器。