Sulfur-containing species sensor

Stabilization of a lipid membrane onto a solid support by covalent attachment also provides the physical stability necessary for the development of practical sensors. An oriented membrane can be prepared by allowing self-assembly of individual amphiphilic molecules onto a solid surface through either the reaction of terminal silane moieties with a hydroxylated surface to form a silyl ether [33,34], or by the reaction of sulfur-terminated compounds (alkylthiols or disulfides) with gold surfaces [35,36]. A variety of species, both with and without polar head groups, have been deposited onto surfaces such as glass, quartz, silicon, and gold [37-39]. These include phospholipids, fatty acids, and fatty amines which were synthetically altered so as to contain either a silyl chloride or a thiol moiety at the terminus of the acyl chain [40]. Both monolayers... 

A Nafion film-coated micro-electrode is very advantageous for in vivo detection of neurotransmitter-related species such as dopamine and catecholamine . The partition and diffusion of the substance in the coating film are generally important factors that influence the response characteristics of the coated electrode. A quinonoid polymer electrode, prepared by the electrochemical oxidation of mercaptohydro-quinone and modified with mercaptide, functioned as a selective ion sensor for heavy metal ions such as Ag", Hg , Cd , and Cu in solution A PVC membrane electrode containing macrocyclic polyethers with sulfur atoms (id) exhibited appreciable selectivity for Ca " " relative to Mg ", alkali metal ions and... 

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