MOLECULAR RECOGNITION OF ALKALI-METAL CATIONS BY A NICKEL HEXACYANOFERRATE MONOLAYER ANCHORED TO SELF-ASSEMBLED MONOLAYERS OF 3,3'-THIODIPROPIONIC ACID ON GOLD
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BHARATHI, S
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CENT ELECTROCHEM RES INST,KARAIKKUDI 623006,TAMIL NADU,INDIACENT ELECTROCHEM RES INST,KARAIKKUDI 623006,TAMIL NADU,INDIA
BHARATHI, S
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YEGNARAMAN, V
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CENT ELECTROCHEM RES INST,KARAIKKUDI 623006,TAMIL NADU,INDIACENT ELECTROCHEM RES INST,KARAIKKUDI 623006,TAMIL NADU,INDIA
YEGNARAMAN, V
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RAO, GP
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CENT ELECTROCHEM RES INST,KARAIKKUDI 623006,TAMIL NADU,INDIACENT ELECTROCHEM RES INST,KARAIKKUDI 623006,TAMIL NADU,INDIA
RAO, GP
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]
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[1] CENT ELECTROCHEM RES INST,KARAIKKUDI 623006,TAMIL NADU,INDIA
A gold electrode surface has been modified with a monolayer of 3,3'-thiodipropionic acid (TPA) by self-assembly. The pH-sensitive TPA monolayer is further derivatized to form a monolayer of nickel hexacyanoferrate. This electrode shows molecular discrimination between potassium and sodium ions and exhibits a near-Nernstian response, with a slope of 55 mV/decade to potassium ions in the range from 10(-2) to 1 M.