High-resolution imaging of catalytic activity of a single graphene sheet using electrochemiluminescence microscopy

Abstract

Here, the electrocatalytic activity at a single graphene sheet is mapped using an electrochemiluminescence (ECL) microscopy with a nanometer resolution. The achievement of this high-spatial imaging relies on the varied...

Insights into enhanced electrochemiluminescence of a multiresonance thermally activated delayed fluorescence molecule

“…1,2 Intelligently combined with electrochemistry and chemiluminescence, ECL has wide application within the fields of sensing and imaging. [4][5][6][7][8] Numerous classes of ECL luminophores (ECLphores) have been reported and their ECL mechanisms studied, including phosphorescent metal complexes, [9][10][11] organic molecules [12][13][14] and nanomaterials. [15][16][17][18][19] For example, [Ru(bpy) 3 ] 2+ , the most widely employed ECLphore, is usually used as the gold standard to determine relative ECL efficiency.…”

A Guide Inside Electrochemiluminescent Microscopy Mechanisms for Analytical Performance Improvement

“…The ECL emission is localized, and after oxygen plasma irradiation, more defects are visible and the emission is enhanced. 56 Concerning materials and the role of oxygen, oxygen vacancies on the surface of rutile TiO 2 nanoparticles were used for immobilizing H 2 O 2 , which upon electrochemical conversion to O 2 * − and OH*, reacts with oxidized luminol to produce a continuous ECL light emission (steady-state luminescence). This emission is correlated with the concentration of hydrogen peroxide, leading to the local ECL visualization of hydrogen peroxide released by single cells.…”

Highly Sensitive Detection of the Insecticide Azamethiphos by Tris(2,2′-bipyridine)ruthenium(II) Electrogenerated Chemiluminescence

“…In line with this, the generated reactive intermediates undergo an electron transfer to generate an excited-state luminophore species, which, ultimately, emits light upon jumping to the ground state. ECL has the advantages of versatility, no external light sources, less background signal, a controllable potential, high sensitivity, and selectivity [ 25 , 26 , 27 , 28 ]. Importantly, the ECL of tris(2,2′-bipyridine)ruthenium(II) (Ru(bpy) 3 2+ ) has received much attention in immunoassays, clinical diagnoses, environmental analyses, and food monitoring, attributed to its good photochemical and electrochemical behaviors, excellent stability, and ECL emission in aqueous solutions.…”