Review: Recent applications of scanning electrochemical microscopy to the study of charge transfer kinetics

Lu, Xiaoquan; Wang, Qin; Liu, Xiuhui

doi:10.1016/j.aca.2007.08.021

Cited by 56 publications

(44 citation statements)

References 150 publications

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“…Enhanced sensitivity was obtained when these measurements were carried out in total internal reflection mode which allowed the direct optical measurements of the accumulation of base electrolytes at the ITIES upon externally applied potentials [168][169][170]. The application of scanning electrochemical microscopy (SECM) has been extended to studies of electron transfer across the ITIES [171][172][173]. The kinetics of electron transfer and ion transfer is determined directly by SECM.…”

Section: Other Techniquesmentioning

confidence: 99%

Simple Ion Transfer at Liquid|Liquid Interfaces

Vallejo

Ovejero

Fernández

et al. 2012

International Journal of Electrochemistry

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The main aspects related to the charge transfer reactions occurring at the interface between two immiscible electrolyte solutions (ITIES) are described. The particular topics to be discussed involve simple ion transfer. Focus is given on theoretical approaches, numerical simulations, and experimental methodologies. Concerning the theoretical procedures, different computational simulations related to simple ion transfer are reviewed. The main conclusions drawn from the most accepted models are described and analyzed in regard to their relevance for explaining different aspects of ion transfer. We describe numerical simulations implementing different approaches for solving the differential equations associated with the mass transport and charge transfer. These numerical simulations are correlated with selected experimental results; their usefulness in designing new experiments is summarized. Finally, many practical applications can be envisaged regarding the determination of physicochemical properties, electroanalysis, drug lipophilicity, and phase-transfer catalysis.

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Section: Other Techniquesmentioning

confidence: 99%

Simple Ion Transfer at Liquid|Liquid Interfaces

Vallejo

Ovejero

Fernández

et al. 2012

International Journal of Electrochemistry

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“…The SECM versatility allows electrochemical studies at almost any interface (i.e. liquid/solid, liquid/liquid and gas/solid interfaces) [25][26][27][28][29][30][31]. As a result, SECM has been applied in various fields such as biology to study the respiratory chain of Escherichia coli [32] or in forensic sciences to image human fingerprints [33,34].…”

Section: Introductionmentioning

confidence: 99%

Adsorbed protein detection by scanning electrochemical microscopy

Cortés‐Salazar

Busnel

2009

Journal of Electroanalytical Chemistry

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a b s t r a c tA scanning electrochemical microscopy (SECM) protein detection methodology has been developed based on the tagging of free cysteines and other nucleophiles in proteins and peptides by benzoquinone. The tagged proteins are detected by the mediated reduction of benzoquinone with a redox species produced electrochemically at the SECM tip. After careful optimization, a sensitivity in the low ng mm À2 range was reached for bovine serum albumin. One of the major advantages of the present technique is that the selectivity of the protein tagging can be tuned by changing the pH of the reaction media. Depending on the requirements, cysteine selective or general detection can therefore be achieved with a high sensitivity. As a proof of concept, this technique was applied to the detection of protein spots and to the imaging of human fingerprints and further compared to the actual SECM state-of-art approach.

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“…Essa espécie é gerada no decorrer dos experimentos pelo substrato ou pelo microeletrodo (Lu, Wang et al, 2007). Nos casos em que o microeletrodo é o "gerador", o substrato opera como "coletor" devido à grande diferença de área a eficiência de coleta é, via de regra, unitária desde que a espécie gerada seja estável.…”

Section: Figuraunclassified

“…O mapeamento da superfície é realizado mantendo-se fixa a posição do microeletrodo na direção z em região muito próxima à superfície do substrato imerso em um eletrólito contendo um mediador redox previamente adicionado ou que seja liberado pela superfície em estudo. Alterando-se a posição do microeletrodo nas direções x e y e monitorando-se a corrente obtida, pode-se obter informação sobre o fluxo ou liberação de material através do substrato, sobre a topografia do substrato como consequência da variação da distância entre o substrato e o microeletrodo, ou ainda construir um mapa da reatividade da superfície com os dados coletados (Bard e Mirkin, 2001;Lu, Wang et al, 2007;Baltes e Heinze, 2009;Okunola, Nagaiah et al, 2009).…”

Section: Obtenção De Imagens Utilizando Secmunclassified

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Uso da microscopia eletroquímica no estudo da dinâmica de processos eletródicos em superfícies funcionalizadas

Lima¹

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Review: Recent applications of scanning electrochemical microscopy to the study of charge transfer kinetics

Cited by 56 publications

References 150 publications

Simple Ion Transfer at Liquid|Liquid Interfaces

Simple Ion Transfer at Liquid|Liquid Interfaces

Adsorbed protein detection by scanning electrochemical microscopy

Uso da microscopia eletroquímica no estudo da dinâmica de processos eletródicos em superfícies funcionalizadas

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