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Dendrimer Modified Thiolated Gold Surfaces as Sensor Devices for Halogenated Alkyl‐Carboxylic Acids in Aqueous Medium. A Promising New Type of Surfaces for Electroanalytical Applications
Author(s) -
LedesmaGarcía J.,
Manríquez J.,
GutiérrezGranados S.,
Godínez Luis A.
Publication year - 2003
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.200390083
Subject(s) - dendrimer , alkyl , aqueous solution , electrochemistry , carboxylic acid , electrode , chemistry , polymer , materials science , combinatorial chemistry , inorganic chemistry , nanotechnology , organic chemistry
Thiolated gold electrodes bearing either carboxylic or amino terminal groups were exposed to dilute PAMAM dendrimer aqueous solutions in which the ramified polymers have the complementary opposite charge. The novel interfaces that result from dendrimer electrostatic aggregation, were then probed as electrochemical sensors for three halogenated carboxylic acid compounds in aqueous solution. The results show an increased sensitivity for the electrochemical detection of the three acids using the modified surfaces as compared to bare gold electrodes. The use of this type of novel interfacial architecture, is presented as a potentially new and important approach for the development of electroanalytical sensors for the detection of organic contaminants in water.