Electrochemical Scanning Tunneling Microscopy (ECSTM) – From Theory to Future Applications

Yagati, Ajay Kumar; Min, Junhong; Choi, Jeong‐Woo

doi:10.5772/57236

Cited by 17 publications

(24 citation statements)

References 92 publications

(92 reference statements)

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“…4 Corrosion of metallic surfaces can be classied into two different forms: uniform or localised. 7 Uniform corrosion takes place over the entire surface and occurs when the surface is in contact with a solution in which it is active. 6,7 Localised corrosion occurs at specic sites on the metal surface.…”

Section: 45mentioning

confidence: 99%

“…7 Uniform corrosion takes place over the entire surface and occurs when the surface is in contact with a solution in which it is active. 6,7 Localised corrosion occurs at specic sites on the metal surface. 7 Forms of localised corrosion, such as pitting or intergranular attack (IGA) for example, are of particular concern as they can occur without any obvious outward signs of damage accumulation, whilst causing signicant deterioration of component structural strength.…”

Section: 45mentioning

confidence: 99%

“…13,17 Thus far, nucleation sites for localised corrosion events have not been conclusively identied, though they oen occur at discontinuities on the surface, such as at grain boundaries (GBs) or inclusions. 6,7,11,18 The nanoscale initiation sites and liquid environment of corrosion are ideal for investigation using atomic force microscopy (AFM), which is a scanning probe microscopy technique developed by Binnig, Quate, and Gerber in 1986. 19 AFM is capable of high-resolution imaging of surface structures and the measurement of mechanical properties at nanometre scales.…”

Section: -48-10mentioning

confidence: 99%

“…6,7 It is an electrochemical process in which a potential difference across the material/environment interface results in the ow of ions and electrons through an electrolyte. 6,7 The process of metallic corrosion is a conglomerate of anodic dissolution of the metal: Corrosion events are affected by a number of different factors, both internal (e.g. surface microstructural properties) and external (e.g.…”

Section: 45mentioning

confidence: 99%

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A study of dynamic nanoscale corrosion initiation events using HS-AFM

et al. 2018

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Atomic force microscopes (AFMs) are capable of high-resolution mapping of structures and the measurement of mechanical properties on nanometre scales within gaseous, liquid and vacuum environments. The contact mode high-speed AFM (HS-AFM) developed at Bristol Nano Dynamics Ltd. operates at speeds that are orders of magnitude faster than conventional AFMs, and is capable of capturing multiple frames per second. This allows for direct observation of dynamic events in real-time, with nanometre lateral resolution and subatomic height resolution. HS-AFM is a valuable tool for the imaging of nanoscale corrosion initiation events, such as metastable pitting, grain boundary (GB) dissolution and short crack formation during stress corrosion cracking (SCC). Within this study HS-AFM was combined with SEM and FIB milling to produce a multifaceted picture of localised corrosion events occurring on thermally sensitised AISI 304 stainless steel in an aqueous solution of 1% sodium chloride (NaCl).HS-AFM measurements were performed in situ by imaging within a custom built liquid cell with parallel electrochemical control. The high resolution of the HS-AFM allowed for measurements to be performed at individual reaction sites, i.e. at specific GB carbide surfaces. Topographic maps of the sample surface allowed for accurate measurements of the dimensions of pits formed. Using these measurements it was possible to calculate, and subsequently model, the volumes of metal reacting with respect to time, and so the current densities and ionic fluxes at work. In this manner, the local electrochemistry at nanoscale reaction sites may be reconstructed.

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Section: 45mentioning

confidence: 99%

Section: 45mentioning

confidence: 99%

Section: -48-10mentioning

confidence: 99%

Section: 45mentioning

confidence: 99%

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A study of dynamic nanoscale corrosion initiation events using HS-AFM

et al. 2018

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“…For underpinning background material, both experimental and theoretical, the reader is therefore referred to the existing extensive literature. See, for example, the following (non exclusive) references [1][2][3][4][5][6][7][8][9] on EC-STM and related techniques. However, it is appropriate first to give a summary of essential concepts.…”

Section: Introductionmentioning

confidence: 99%

High-resolution electrochemical STM of redox metalloproteins

Elliott

2017

Current Opinion in Electrochemistry

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Electrochemical studies of redox active metalloproteins have become an increasingly fruitful area of study in recent years, particularly with the single-molecule resolution capability of electrochemical scanning tunnelling microscopy (EC-STM) which provides both imaging and current-voltage spectroscopy under bipotentiostatic control. In this review, some of the most exciting advances in recent years are outlined, and directions for future research are considered.

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A Happy Get‐Together – Probing Electrochemical Interfaces by Non‐Linear Vibrational Spectroscopy

Dietzek‐Ivanšić

2022

Chemistry A European J

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Electrochemical interfaces are key structures in energy storage and catalysis. Hence, a molecular understanding of the active sites at these interfaces, their solvation, the structure of adsorbates, and the formation of solidelectrolyte interfaces are crucial for an in-depth mechanistic understanding of their function. Vibrational sum-frequency generation (VSFG) spectroscopy has emerged as an operando spectroscopic technique to monitor complex electrochemical interfaces due to its intrinsic interface sensitivity and chemical specificity. Thus, this review discusses the happy get-together between VSFG spectroscopy and electrochemical interfaces. Methodological approaches for answering core issues associated with the behavior of adsorbates on electrodes, the structure of solvent adlayers, the transient formation of reaction intermediates, and the emergence of solid electrolyte interphase in battery research are assessed to provide a critical inventory of highly promising avenues to bring optical spectroscopy to use in modern material research in energy conversion and storage.

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Electrochemical Scanning Tunneling Microscopy (ECSTM) – From Theory to Future Applications

Cited by 17 publications

References 92 publications

A study of dynamic nanoscale corrosion initiation events using HS-AFM

A study of dynamic nanoscale corrosion initiation events using HS-AFM

High-resolution electrochemical STM of redox metalloproteins

A Happy Get‐Together – Probing Electrochemical Interfaces by Non‐Linear Vibrational Spectroscopy

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