Advanced electroanalytical chemistry at nanoelectrodes

Ying, Yi‐Lun; Ding, Zhifeng; Zhan, Dongping; Long, Yi‐Tao

doi:10.1039/c7sc00433h

Cited by 117 publications

(77 citation statements)

References 122 publications

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“…[6] Many types of measurements obtain averaged properties primarily at the ensemble level;h owever, they do not enable the correlation of photoelectrochemical properties with the particular types of dyes or particles present. [8] Theelectrochemical study of stochastic single nanoparticle collisions has been successfully employed to investigate the electrocatalysis, blocking,a nd electrochemical stripping of individual nanoparticles. [8] Theelectrochemical study of stochastic single nanoparticle collisions has been successfully employed to investigate the electrocatalysis, blocking,a nd electrochemical stripping of individual nanoparticles.…”

Section: Single-nanoparticlephotoelectrochemistry At Ananoparticulatementioning

confidence: 99%

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode

Peng

et al. 2018

Angew Chem Int Ed

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An ultrasensitive photoelectrochemical method for achieving real-time detection of single nanoparticle collision events is presented. Using a micrometer-thick nanoparticulate TiO -filmed Au ultra-microelectrode (TiO @Au UME), a sub-millisecond photocurrent transient was observed for an individual N719-tagged TiO (N719@TiO ) nanoparticle and is due to the instantaneous collision process. Owing to a trap-limited electron diffusion process as the rate-limiting step, a random three-dimensional diffusion model was developed to simulate electron transport dynamics in TiO film. The combination of theoretical simulation and high-resolution photocurrent measurement allow electron-transfer information of a single N719@TiO nanoparticle to be quantified at single-molecule accuracy and the electron diffusivity and the electron-collection efficiency of TiO @Au UME to be estimated. This method provides a test for studies of photoinduced electron transfer at the single-nanoparticle level.

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Section: Single-nanoparticlephotoelectrochemistry At Ananoparticulatementioning

confidence: 99%

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode

Peng

et al. 2018

Angew Chem Int Ed

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“…The dynamics of these processes dictate the overall electrochemical response, including whether or not particles effectively catalyze desired reactions or undergo total anodic dissolution ,,. The ability to probe these dynamics is determined by the experimental response bandwidth and noise, which are defined by the electronics, stray capacitances, and application of filters ,…”

Section: Introductionmentioning

confidence: 99%

Effects of Instrumental Filters on Electrochemical Measurement of Single‐Nanoparticle Collision Dynamics

et al. 2018

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We discuss herein present-day instrumental limitations to the electrochemical measurement of fast processes occurring at the single-entity scale. We focus on the effect of filters on potentiostatic experiments in which the monitored current results from partial oxidations of an individual Ag nanoparticle undergoing repeated high-frequency collisions with an electrode. From analysis of the resulting peak-shaped current-time events, we conclude that the average timescale of a single Ag nanoparticle/electrode collision is too short to resolve at the temporal limitations of current instrumentation. These findings are consistent with previously reported random walk model that predicts nanoparticle/electrode interactions at nanosecond timescales.[a] Dr.

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“…[7] Single-nanoparticle electrochemistry is an intriguing technique for observing the electrochemical behaviors of individual nanoparticles because it enables the complete removal of ensemble-averaged measurements. [8] Theelectrochemical study of stochastic single nanoparticle collisions has been successfully employed to investigate the electrocatalysis, blocking,a nd electrochemical stripping of individual nanoparticles. [9] Recently,r esearchers adapted these stochastic collision measurements to detect photoelectrochemical behaviors of individual semiconducting nanoparticles and agglomerates,observing the stepwise signal with the timescale of second level.…”

Section: Single-nanoparticlephotoelectrochemistry At Ananoparticulatementioning

confidence: 99%

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode

Peng

et al. 2018

Angewandte Chemie

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An ultrasensitive photoelectrochemical method for achieving real-time detection of single nanoparticle collision events is presented. Using am icrometer-thick nanoparticulate TiO 2 -filmed Au ultra-microelectrode (TiO 2 @AuUME), asubmillisecond photocurrent transient was observed for an individual N719-tagged TiO 2 (N719@TiO 2 )n anoparticle and is due to the instantaneous collision process.O wing to at raplimited electron diffusion process as the rate-limiting step, arandom three-dimensional diffusion model was developed to simulate electron transport dynamics in TiO 2 film. The combination of theoretical simulation and high-resolution photocurrent measurement allowelectron-transfer information of asingle N719@TiO 2 nanoparticle to be quantified at singlemolecule accuracy and the electron diffusivity and the electroncollection efficiency of TiO 2 @AuU ME to be estimated. This method provides at est for studies of photoinduced electron transfer at the single-nanoparticle level.

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Advanced electroanalytical chemistry at nanoelectrodes

Abstract: In this perspective, we discuss the challenges, advances and opportunities in electroanalytical chemistry at nanoelectrodes, including nanoelectrode fabrication, real-time characterizations, and high-performance electrochemical instrumentation.

Cited by 117 publications

References 122 publications

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode

Effects of Instrumental Filters on Electrochemical Measurement of Single‐Nanoparticle Collision Dynamics

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode

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Advanced electroanalytical chemistry at nanoelectrodes

Abstract: In this perspective, we discuss the challenges, advances and opportunities in electroanalytical chemistry at nanoelectrodes, including nanoelectrode fabrication, real-time characterizations, and high-performance electrochemical instrumentation.

Cited by 117 publications

References 122 publications

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO2‐Filmed Ultramicroelectrode

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO2‐Filmed Ultramicroelectrode

Effects of Instrumental Filters on Electrochemical Measurement of Single‐Nanoparticle Collision Dynamics

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO2‐Filmed Ultramicroelectrode

Contact Info

Product

Resources

About

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode

Single‐Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO₂‐Filmed Ultramicroelectrode