title: Aptamer conformational switch as sensitive electrochemical biosensor for potassium ion recognition.
abstract: We report the first use of an electrochemical aptasensor for selective potassium recognition, based on a conformational change, affording an electric signal transduced electrochemically by square wave voltammetry or electrochemical impedance spectroscopy.
authors.affiliation: Nanobiotechnology and Bioanalysis Group, Department of Chemical Engineering, Universitat Rovira i Virgili, Tarragona 43007, Spain. abd.radi@urv.net
authors.forename: Abd-Elgawad
authors.initials: AE
authors.lastname: Radi
authors.forename: Ciara K
authors.initials: CK
authors.lastname: O'Sullivan
mesh_terms: D052157:Aptamers, Nucleotide / Q000737:chemistry*; D015374:Biosensing Techniques / Q000379:methods*; D017097:Electric Impedance; D004563:Electrochemistry; D007477:Ions / Q000032:analysis; D009690:Nucleic Acid Conformation; D011188:Potassium / Q000032:analysis*; D012680:Sensitivity and Specificity; D013499:Surface Properties
chemical_list: D052157:Aptamers, Nucleotide; D007477:Ions; D011188:Potassium