Fabrication of Carbon, Gold, Platinum, Silver, and Mercury Ultramicroelectrodes with Controlled Geometry

Danis, Laurence; Polcari, David; Kwan, Annie; Gateman, Samantha Michelle; Mauzeroll, Janine

doi:10.1021/ac503767n

Cited by 76 publications

(91 citation statements)

References 25 publications

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“…All C-ME characterization and SECM were performed with an ElProScan 3 system (HEKA, Germany; bipotentiostat model PG340). The prepared SS substrate was probed using a 4.7 μm diameter C-ME, which was fabricated following an established protocol, 40 reproduced in the SI. SECM feedback mode measurements.…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

The role of titanium in the initiation of localized corrosion of stainless steel 444

et al. 2018

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Titanium has been added to ferritic stainless steels to combat the detrimental effects of intergranular corrosion. While this has proven to be a successful strategy, we have found that the resulting Ti-rich inclusions present on the surface play a significant role in the initiation of other forms of localized corrosion. Herein, we report the effect of these inclusions on the localized corrosion of a stainless steel using macro and micro electrochemical techniques. Through the use of scanning electrochemical microscopy, we observe the microgalvanic couple formed between the conductive inclusions and passivated metal matrix. The difference in local reactivity across the material's surface was quantified using a 3D finite element model specifically built to respect the geometry of the corrosion-initiating features. Combined with electron microscopy and micro elemental analysis, localization of other alloying elements has been reported to provide new insight on their significance in localized corrosion resistance.

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Section: Materials and Sample Preparationmentioning

confidence: 99%

The role of titanium in the initiation of localized corrosion of stainless steel 444

et al. 2018

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“…Microelectrodes were fabricated using soda-lime glass capillaries and assembled following a procedure reported in the literature. 35 Electrodes were polished using a variable speed polisher.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

High-Speed Scanning Electrochemical Microscopy Method for Substrate Kinetic Determination: Application to Live Cell Imaging in Human Cancer

2015

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Scanning electrochemical microscopy (SECM) is increasingly applied to study and image live cells. Quantitative analyses of biological systems, however, still remain challenging. In the presented study, single human adenocarcinoma cervical cancer cells are electrochemically investigated by means of SECM. The target cell's electrochemical response is observed over time under the influence of green tea catechins (GTC), which are suggested to offer chemopreventive and therapeutic effects on cancer. The electrochemical response of living target cells is measured experimentally and quantified in an apparent heterogeneous rate constant by using a numerical model, based on forced convection during high speed SECM imaging. The beneficial effect of GTC on cancer cells could be confirmed by SECM, and the presented study shows an alternative approach toward unraveling the mechanisms involved during inhibition of carcinogenesis.

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“…For SICM, the micropipette with 25 mm orifice was prepared by the following procedure ( Figure S1); where Ag microelectrode (25 mm diameter) was prepared in a conventional procedure. [40] Later the Ag was dissolved in concentrated HNO 3 solution. The micropipette was filled with electrolyte by back filling procedure.…”

Section: Methodsmentioning

confidence: 99%

Scanning Electrochemical Microscopy versus Scanning Ion Conductance Microscopy for Surface Patterning

Sarkar

Mandler

2017

ChemElectroChem

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Scanning electrochemical microscopy (SECM) offers an alternative approach for precise local electrodeposition of micro‐ and nanometer structures driven by electrochemistry. The tip generation and substrate collection mode of SECM has been applied to deposit sub‐micron palladium structures by using a Pd microelectrode. This was compared with a different approach based on scanning ion conductance microscopy (SICM). The latter was utilized also for the localized electrochemical deposition of Pd patterns using a pulled micropipette as a tip. The micropipette was filled with PdCl42− and biased versus a reference electrode placed in a NaCl solution. The application of a negative potential to the micropipette causes negatively charged ions, PdCl42−, to egress the pipette, which were electrochemically reduced on a conducting surface. The Pd patterns locally deposited by SECM and SICM were used for the local electroless deposition of Cu. Comparison between the two techniques shows that SICM is superior to SECM in terms of resolution and ease of tip preparation.

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Fabrication of Carbon, Gold, Platinum, Silver, and Mercury Ultramicroelectrodes with Controlled Geometry

Cited by 76 publications

References 25 publications

The role of titanium in the initiation of localized corrosion of stainless steel 444

The role of titanium in the initiation of localized corrosion of stainless steel 444

High-Speed Scanning Electrochemical Microscopy Method for Substrate Kinetic Determination: Application to Live Cell Imaging in Human Cancer

Scanning Electrochemical Microscopy versus Scanning Ion Conductance Microscopy for Surface Patterning

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