Surface-Based Lithium Ion Sensor: An Electrode Derivatized with a Self-Assembled Monolayer

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• 作者：Nantanit Wanichacheva ; Ernesto R. Soto ; Christopher R. Lambert ; W. Grant McGimpsey
• 刊名：Analytical Chemistry
• 出版年：2006
• 出版时间：October 15, 2006
• 年：2006
• 卷：78
• 期：20
• 页码：7132 - 7137
• 全文大小：154K
• 年卷期：v.78,no.20(October 15, 2006)
• ISSN：1520-6882

文摘

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 sessiledrop contact angle, ellipsometry, grazing angle FT-IRspectroscopy, and electrochemical techniques. The cationrecognition properties of the SAM were studied by cyclicvoltammetry and impedance spectroscopy. The films showmoderate selectivity for detection of Li⁺ ions in solutionover K⁺ and Na⁺, with selectivity values calculated to belog K_Li⁺,Na⁺ ~ -1.30 and log K_Li⁺,K⁺ ~ -0.92. To the bestof our knowledge, this is the first demonstration of alithium sensor fabricated using self-assembled monolayertechnology.