Combining Electrodeposition and Optical Microscopy for Probing Size‐Dependent Single‐Nanoparticle Electrochemistry

Lemineur, Jean‐François; Noël, Jean‐Marc; Ausserré, Dominique; Combellas, Catherine; Kanoufi, Frédéric

doi:10.1002/ange.201807003

Cited by 18 publications

(62 citation statements)

References 35 publications

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“…The electrolyte solution was prepared with 0.1 mol/L phosphate buffer of pH 7.4 and supporting electrolyte of 0.05 mol/L KNO 3 . Tris(2,2'-bipyridyl) ruthenium (II) chloride hexahydrate (Ru(bpy) 3 2 + ) purchased from Aldrich was made into a 1.0 × 10 À 3 mol/L stock solution with the electrolyte and stored in the light-protected bottle. The working solutions of Ru(bpy) 3 2 + were freshly prepared from the stock solution with the electrolyte.…”

Section: Chemicalsmentioning

confidence: 99%

“…The material properties determined by their size are indeed fascinating and form the basis of an emerging field of nanoscience. In addition, molecular level understanding of nanoparticles through small size effect has facilitated the application of nanotechnology in life sciences [2,3]. As the most stable precious metal nanoparticle, gold nanoparticles (AuNPs) are widely applied in many fields because of its high electron density, dielectric property, catalysis and very good adsorption characteristics [4].…”

Section: Introductionmentioning

confidence: 99%

“…Due to its particularity, ECL has been widely applied to biochemical analysis. Ruthenium complex (such as Ru(bpy) 3 2 + , where bpy = 2,2'-bipyridine) is a most common ECL reagent, which has been frequently used in the fields of DNA analysis [17], immunoassay [18] and drug analysis [19] because of its easy preparation, the developed technology and lower cost. In typical ECL, the co-reaction reagent is required, and commonly used reducing agents including tripropylamine (TPrA), amino acids, ascorbic acid or quantum dots, etc.…”

Section: Introductionmentioning

confidence: 99%

“…In typical ECL, the co-reaction reagent is required, and commonly used reducing agents including tripropylamine (TPrA), amino acids, ascorbic acid or quantum dots, etc. [20][21][22], they allow Ru(bpy) 3 3 + generated on the electrode to be reduced to produce an excited state Ru(bpy) 3 2 + *, causing the emission of light. AuNPs as a component of composite nanomaterials have been used for ECL analysis.…”

Section: Introductionmentioning

confidence: 99%

“…However, the direct ECL reaction between luminophores and AuNPs did not occur, although AuNPs have played an important role in these approaches. As a new co-reagent, small size AuNPs can react with Ru(bpy) 3 2 + form a new ECL system, which shows its new application potential [24]. In order to understand the characteristics of this ECL reaction and the need for further application, we are going to investigate the effect of AuNPs size on ECL and concentration response of various sizes of AuNPs in ECL reaction.…”

Section: Introductionmentioning

confidence: 99%

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Small Size Effect and Concentration Response of Gold Nanoparticles in Electrochemiluminescence Reaction

et al. 2019

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Recent reports have used gold nanoparticles (AuNPs) as a co‐reactant for the electrochemiluminescence (ECL) reaction of ruthenium complex. However, understanding the size effect of AuNPs on ECL reaction is very meaningful to explore its unknowns and develop its applications at the molecular level. In this paper, we examined the behavior of various small‐size AuNPs in ECL reaction, focusing on changes in ECL caused by AuNPs size and reasons for this change. Although the luminescence spectra and excitation potential have hardly changed in ECL reaction, the difference of ECL intensities induced by different sizes AuNPs is very obviously. Our experimental results revealed disparate behaviors depending on AuNPs size: the small‐sized AuNPs can lead to stronger ECL, and ECL intensities increase as the addition of AuNPs concentration in the wider range. This small size effect is related to an intermediate process of charge‐discharge in electric double layer formed by adsorbing ruthenium complex with AuNPs, and the surface and quantum size effect of AuNPs may affect this intermediate process. More importantly, AuNPs can act as a marker, has the same small size effect and concentration response, and bring about a promising platform for biochemical analysis.

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Section: Chemicalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Small Size Effect and Concentration Response of Gold Nanoparticles in Electrochemiluminescence Reaction

et al. 2019

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Electrochemistry and Optical Microscopy

Kanoufi

2021

Encyclopedia of Electrochemistry

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Electrochemistry exploits local current heterogeneities at various scales ranging from the micrometer to the nanometer. The last decade has witnessed unprecedented progress in the development of a wide range of electroanalytical techniques allowing to reveal and quantify such heterogeneity through multiscale and multifonctionnal operando probing of electrochemical processes. However most of these advanced electrochemical imaging techniques, employing scanning probes, suffer from either low imaging throughput or limited imaging size. In parallel, optical microscopies, which can image a wide field of view in a single snapshot, have made considerable progress in terms of sensitivity, resolution and implementation of detection modes. Optical microscopies are then mature enough to propose, with basic bench equipment, to probe in a non destructive way a wide range of optical (and therefore structural) properties of a material in situ, in real time: under operating conditions. They offer promising alternative strategies for quantitative high-resolution imaging of electrochemistry. The first sections recall the optical properties of materials and how they can be probed optically. They discuss fluorescence, Raman, surface plasmon resonance, scattering or refractive index. Then the different optical microscopes used to image electrochemical processes are examined along with some strategies to extract quantitative electrochemical information from optical images. Finally the last section reviews some examples of in situ imaging, at micro-to nanometer resolution, and quantification of electrochemical processes ranging from solution diffusion to the conversion of molecular interfaces or solids.]

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Directly Imaging Dynamic Electronic Coupling during Electrochemical Oxidation of Single Silver Nanoparticles

Jiang

et al. 2022

Angewandte Chemie

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The electronic coupling between a metal electrode and single nano-entities is of unfading significance which impacts the heterogeneous electron transfer. Herein, we demonstrated a simple optical technique for directly imaging the transient interfacial electronic coupling events during electrochemical oxidation of single Ag nanoparticles on Au electrode. The electronic coupling brings out a dramatic dip behavior of bright field imaging traces, and is conductive to cross the energy barrier of oxidation for single silver nanoparticles. This dip behavior is further verified by in situ vistransmission spectroscopy, and the heterogeneity of the AuÀ Ag electronic coupling down to single-nanoparticle level is uncovered by unifying the morphology and size of individual silver nanoparticles. These results suggest the interfacial electronic coupling facilitates electron transfer of single nanoparticles, and provide important insight into understanding detailed mechanism of nanoelectrochemistry.

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Combining Electrodeposition and Optical Microscopy for Probing Size‐Dependent Single‐Nanoparticle Electrochemistry

Abstract: Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Cited by 18 publications

References 35 publications

Small Size Effect and Concentration Response of Gold Nanoparticles in Electrochemiluminescence Reaction

Small Size Effect and Concentration Response of Gold Nanoparticles in Electrochemiluminescence Reaction

Electrochemistry and Optical Microscopy

Directly Imaging Dynamic Electronic Coupling during Electrochemical Oxidation of Single Silver Nanoparticles

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