Non-contact feedback for scanning capillary microscopy

Eng, Lukas M.; Wirth, Eileen; Suter, Thomas; Böhni, H.

doi:10.1016/s0013-4686(98)00043-7

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…An automated probe-positioning system was also attempted; in this system the substrate was mounted onto piezoelectric actuators and oscillated at the resonant frequency, with either a damping of the oscillation amplitude or a shift in the resonant frequency used to detect probe landing (33). To incorporate the possibility of moving the scanning droplet cell across the surface, a liquid droplet was used that was not confined by a gasket (34--36).…”

Section: Introductionmentioning

confidence: 99%

Scanning Electrochemical Cell Microscopy: A Versatile Technique for Nanoscale Electrochemistry and Functional Imaging

Ebejer

Güell²,

Lai³

et al. 2013

Annual Rev. Anal. Chem.

307

382

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■ Abstract Scanning electrochemical cell microscopy (SECCM) is a new pipette-based imaging techniquepurposely designed to allow simultaneous electrochemical, conductance, and topographical visualization of surfaces and interfaces. SECCM uses a tiny meniscus or droplet, confined between the probe and the surface, for high-resolution functional imaging and nanoscale electrochemical measurements. Here we introduce this technique and provide an overview of its principles, instrumentation, and theory. We discuss the power of SECCM in resolving complex structure-activity problems and provide considerable new information on electrode processes by referring to key example systems, including graphene, graphite, carbon nanotubes, nanoparticles, and conducting diamond. The many longstanding questions that SECCM has been able to answer during its short existence demonstrate its potential to become a major technique in electrochemistry and interfacial science.

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Section: Introductionmentioning

confidence: 99%

Scanning Electrochemical Cell Microscopy: A Versatile Technique for Nanoscale Electrochemistry and Functional Imaging

Ebejer

Güell²,

Lai³

et al. 2013

Annual Rev. Anal. Chem.

307

382

View full text Add to dashboard Cite

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“…Initially, the microcapillary technique only allowed individual measurements to be made at specific surface locations but was subsequently developed to facilitate surface imaging. To date, these experiments have tended to focus on surface electrochemical processes intrinsic to corrosion and passivation, , but there is clearly scope for investigating electrochemical processes involving solution redox couples, which is the focus of the studies herein.…”

mentioning

confidence: 99%

Scanning Micropipet Contact Method for High-Resolution Imaging of Electrode Surface Redox Activity

et al. 2009

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A scanning micropipet contact method (SMCM) is described which promises wide-ranging application in imaging and quantifying electrode activity at high spatial resolution. In SMCM, a moveable micropipet probe (diameter 300 nm to 1 microm) containing an electroactive species in electrolyte solution is brought to a sample electrode surface so that the liquid meniscus makes contact. The micropipet contains a reference-counter electrode, and the sample is connected as the working electrode to make a two-electrode voltammetric measurement. SMCM thus makes possible highly localized electrochemical experiments, and furthermore, heterogeneous electrode surfaces may be investigated without the substrate being completely immersed in solution. This opens up the possibility of making measurements on a wide range of electrode materials without having to encapsulate the electrode. Furthermore, the electrode/solution contact can be made rapidly and briefly, which is useful for situations where the electrode would be unstable for longer periods (e.g., due to corrosion or surface adsorption). For heterogeneously active surfaces the technique is particularly powerful as it allows defined areas to be targeted and individual sites to be probed. To exemplify the approach, the electroactivity of basal plane highly oriented pyrolytic graphite (HOPG) and two types of aluminum alloy were investigated. SMCM measurements indicate that basal plane HOPG shows much greater activity than present consensus. Measurements of chemically heterogeneous aluminum alloy surfaces with SMCM allow variations in redox activity to be mapped with high spatial resolution.

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“…In recent years, advancements in electrochemical techniques have provided new tools for studying local electrochemical processes on corroding surfaces and widened the range of corrosion investigations. 9,10 Such local techniques include microelectrodes, [11][12][13][14] localized electrochemical impedance spectroscopy ͑LEIS͒, [15][16][17][18] and surface scanning techniques like, to name a few, scanning vibrating electrode technique ͑SVET͒, 19 scanning reference electrode technique ͑SRET͒, [20][21][22] scanning tunneling microscopy ͑STM͒, [23][24][25] atomic force microscopy ͑AFM͒, [26][27][28][29][30] and scanning electrochemical microscopy ͑SECM͒. [31][32][33][34] The combination of these or other in situ local electrochemical techniques is a powerful tool, since it is possible to obtain complementary local information of ongoing corrosion processes.…”

mentioning

confidence: 99%

In Situ Local Dissolution of Duplex Stainless Steels in 1 M H[sub 2]SO[sub 4] + 1 M NaCl by Electrochemical Scanning Tunneling Microscopy

Femenia

Pan

Leygraf

2002

J. Electrochem. Soc.

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Local dissolution behavior of duplex stainless steel UNS S32304, UNS S31803, and UNS S32750 in 1MH2SO4+1MnormalNaCl was studied in situ by electrochemical scanning tunneling microscopy (STM). Submicrometer features could be resolved and events occurring at phase/grain boundary regions could be monitored in the solution. By STM imaging, severe local dissolution was observed on UNS S32304 in the form of both pitting-like dissolution occurring at the active potential region, and selective dissolution of ferrite phase that already started at the corrosion potential. On UNS S31803, no pitting-like corrosion was observed, but a small amount of selective dissolution occurred at anodic potentials in the active region. The phase boundary region seemed to be prone to local dissolution. No noticeable local dissolution was observed on UNS S32750 in this solution in active and passive potential regions. The results show that a sufficient amount of both Mo and N in duplex stainless steel resulted in more homogeneous dissolution of the two phases and strengthened phase boundaries, and thus decreased the risk for local dissolution. © 2002 The Electrochemical Society. All rights reserved.

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Non-contact feedback for scanning capillary microscopy

Cited by 11 publications

References 6 publications

Scanning Electrochemical Cell Microscopy: A Versatile Technique for Nanoscale Electrochemistry and Functional Imaging

Scanning Electrochemical Cell Microscopy: A Versatile Technique for Nanoscale Electrochemistry and Functional Imaging

Scanning Micropipet Contact Method for High-Resolution Imaging of Electrode Surface Redox Activity

In Situ Local Dissolution of Duplex Stainless Steels in 1 M H[sub 2]SO[sub 4] + 1 M NaCl by Electrochemical Scanning Tunneling Microscopy

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