title: Improvement of Electrochemical Response of Cocaine Sensors Based on DNA Aptamer by Heat Treatment.
abstract: We report on a biosensor for cocaine based on the conformation change of DNA aptamer by capturing the cocaine molecules. The oxidation current of ferrocene conjugated on the terminal end of aptamer immobilized on an Au electrode increased with increasing cocaine concentration. The sensor response has been improved by a simple heat treatment after immobilization, since the aggregates of DNA aptamer generated during the immobilization step could be dissociated and rearranged on the electrode.
authors.affiliation: Advanced Research Division, Bio Research Department, Panasonic Corporation.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Arimoto
authors.forename: Ken
authors.initials: K
authors.lastname: Shimono
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yasukawa
authors.forename: Fumio
authors.initials: F
authors.lastname: Mizutani
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Yoshioka
mesh_terms: D052157:Aptamers, Nucleotide / Q000737:chemistry*; D015374:Biosensing Techniques; D003042:Cocaine / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D006358:Hot Temperature
chemical_list: D052157:Aptamers, Nucleotide; D003042:Cocaine