Localized Electrochemiluminescence from Nanoneedle Electrodes for Very-high-density Electrochemical Sensing

Jingjing Zhang, Junyu Zhou, Chunxiu Tian, Shan Yang, Dechen Jiang, Xixiang Zhang, Hong-Yuan Chen

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

In this paper, localized electrochemiluminescence (ECL) was visualized from nanoneedle electrodes that achieved very-high-density electrochemical sensing. The localized luminescence at the nanometer-sized tip observed was ascribed to enhanced mass transfer of the luminescence probe at the tip than on the planar surface surrounding the tip, which provided higher luminescence at the tip. The size of the luminescence spots was restricted to 15 μm permitting the electrochemical analysis with a density over 4 × 103 spots/mm2. The positive correlation between the luminescence intensity at the tips and the concentration of hydrogen peroxide supported the quantitative ECL analysis using nanoneedle electrodes. The further modification of glucose oxidase at the electrode surface conceptually demonstrated that the concentration of glucose ranging from 0.5 to 5 mM could be quantified using the luminescence at the tips, which could be further applied for the detection of multiple molecules in the complex biosystem. This successful localized ECL offers a specific strategy for the development of very-high-density electrochemical arrays without the complicated chip design.
Original languageEnglish (US)
Pages (from-to)11399-11404
Number of pages6
JournalAnalytical Chemistry
Volume89
Issue number21
DOIs
StatePublished - Oct 10 2017

Fingerprint

Dive into the research topics of 'Localized Electrochemiluminescence from Nanoneedle Electrodes for Very-high-density Electrochemical Sensing'. Together they form a unique fingerprint.

Cite this