Issue 29, 2018

Dynamically imaging collision electrochemistry of single electrochemiluminescence nano-emitters

Abstract

The quest for new techniques to measure single nanomaterials is a great impetus to research efforts to understand individual behaviours. Here, we develop an electrochemiluminescence (ECL) microscopy for visualization of stochastic collision electrochemistry of single nano-emitters without the interference of current and optical background. This design uses a water-immersion objective to capture the ECL emission of nanoparticles near the specular electrode surface for enhancing light collection efficiency. The approach enables us to trace the collision trajectory of multiple nanoparticles and spatially distinguish simultaneous collisions. Results reveal that collision types, frequencies and ECL intensities significantly depend on surface natures, particle concentrations, and diffusion fluxes. By recording successive collisions, we develop a “relay probe” sensing platform for long-term research. This imaging technique displays great potential for applications in single-particle electrochemical and analytical research.

Graphical abstract: Dynamically imaging collision electrochemistry of single electrochemiluminescence nano-emitters

Supplementary files

Article information

Article type
Edge Article
Submitted
22 May 2018
Accepted
29 Jun 2018
First published
30 Jun 2018
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2018,9, 6167-6175

Dynamically imaging collision electrochemistry of single electrochemiluminescence nano-emitters

C. Ma, W. Wu, L. Li, S. Wu, J. Zhang, Z. Chen and J. Zhu, Chem. Sci., 2018, 9, 6167 DOI: 10.1039/C8SC02251H

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