title: Combined Blip and Staircase Response of Ascorbic Acid-Stabilized Copper Single Nanoparticle Collision by Electrocatalytic Glucose Oxidation.
abstract: The current response of the collision of ascorbic acid-stabilized copper (Cu) single nanoparticles (NPs) on a gold (Au) ultramicroelectrode (UME) surface was observed by using an electrocatalytic amplification method. Here, the glucose oxidation electrocatalyzed by oxidized Cu NPs was used as the indicating reaction. In this system, the NP collision signals were obtained simultaneously by both direct particle electrolysis and electrocatalytic amplification. For example, when the applied potential was high enough for Cu NP oxidation, a blip response combined with a staircase response was observed as a current signal. The blip part in the single Cu NP collision signal indicates the self-oxidation of a Cu NP, and the staircase part indicates the steady-state electrocatalytic reaction by oxidized Cu NP.
authors.affiliation: Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 143-701, Korea.
authors.forename: Yun Dong
authors.initials: YD
authors.lastname: Choi
authors.affiliation: Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 143-701, Korea.
authors.forename: Seung Yeon
authors.initials: SY
authors.lastname: Jung
authors.affiliation: Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 143-701, Korea.
authors.forename: Ki Jun
authors.initials: KJ
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 143-701, Korea. sjkwon@konkuk.ac.kr.
authors.forename: Seong Jung
authors.initials: SJ
authors.lastname: Kwon
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D055664:Electrochemical Techniques; D005947:Glucose / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D008839:Microelectrodes; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D013499:Surface Properties
chemical_list: D006046:Gold; D003300:Copper; D005947:Glucose; D001205:Ascorbic Acid
keywords: current response; electrocatalytic amplification; glucose oxidation; nanoparticles; ultramicroelectrode