Reversibly Tuning Electrochemiluminescence with Stimulated Emission Route for Single-Cell Imaging

Overview

Journal Research (Wash D C)

Date 2025 Jan 30

PMID 39882543

Authors

Cheng Ma

Xiaodan Gou

Zejing Xing

Min-Xuan Wang

Wenlei Zhu

Qin Xu

Dechen Jiang

Jun-Jie Zhu

Affiliations

Soon will be listed here.

Abstract

Electrochemiluminescence (ECL) has established itself as an excellent transduction technique in biosensing and light-emitting device, while conventional ECL mechanism depending on spontaneous emission of luminophores lacks reversibility and tunable emission characters, limiting the universality of ECL technique in the fields of fundamental research and clinical applications. Here, we report the first observation of stimulated emission route in ECL and thus establish a reversible tuning ECL microscopy for single-cell imaging. This microscopy uses a focused red-shifted beam to transfer spontaneous ECL into stimulated ECL, which enables selective and reversible tuning of ECL emission from homogeneous solution, single particles, and single cells. After excluding other possible competitive routes, the stimulated ECL emission route is confirmed by a dual-objective system in which the suppressed spontaneous ECL is accompanied by the enhanced stimulated ECL. By incorporating a commercial donut-shaped beam, the sharpness of single-cell matrix adhesion is improved 2 to 3 times compared with the counterpart in confocal ECL mode. The successful establishment of this stimulated emission ECL will greatly advance the development of light-emitting device and super-resolution ECL microscopy.

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