title: Surface-based lithium ion sensor: An electrode derivatized with a self-assembled monolayer.
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.
authors.affiliation: Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, Massachusetts 01609, USA.
authors.forename: Nantanit
authors.initials: N
authors.lastname: Wanichacheva
authors.forename: Ernesto R
authors.initials: ER
authors.lastname: Soto
authors.forename: Christopher R
authors.initials: CR
authors.lastname: Lambert
authors.forename: W Grant
authors.initials: WG
authors.lastname: McGimpsey