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Atomic Force Microscopy Study of new Sensing Platforms: Cucurbit[ n ]uril ( n =6, 7) on Gold
Author(s) -
Blanco Elías,
Quintana Carmen,
Hernández Lucas,
Hernández Pedro
Publication year - 2013
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200379
Subject(s) - adsorption , hydroquinone , chemistry , aqueous solution , ion , electrode , sodium , atomic force microscopy , layer (electronics) , inorganic chemistry , nanotechnology , materials science , organic chemistry
This work presents the comparative study of the spontaneous adsorption of cucurbit[6]uril and cucurbit[7]uril on gold by means of atomic force microscopy. A faster cucurbit[6]uril adsorption was not achieved by the use of a cucurbit[6]uril solution with sodium salts to increment its solubility than by the treatment with a saturated one in water. However, sodium ions promoted the cucurbit[6]uril polymerization on the previously adsorbed layer. The electrode reaction of hydroquinone became irreversible when a cucurbit[6]uril modified gold electrode was used. Cucurbit[7]uril adsorption was faster than for the smaller homologue and multilayers were generated too with high adsorption times.