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Your search keyword '"Gateman, Samantha M."' showing total 11 results
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11 results on '"Gateman, Samantha M."'

1. Simple and Fast Fabrication Methodology for Platinum and Carbon Ultramicroelectrodes (UME) in Scanning Electrochemical Microscopy (SECM)

Author

Lord, Emma Mae, Joseph, Jiju, Gateman, Samantha M., and Ding, Zhifeng

Subjects
Ultramicroelectrodes, UME, Electrochemistry, Scanning Electrochemical Microscopy, SECM, Physical Chemistry, Analytical Chemistry
Abstract

Scanning electrochemical microscopy (SECM) is a highly versatile method for measuring and imaging a wide range of systems. When paired with an intricately made ultramicroelectrode (UME) probe, SECM becomes an even more powerful tool for imaging microscale features in a system. However, purchasing these UME’s comes at a high cost with less ability for modification. Having high quality UME’s expands the ability of SECM and enables precise measuring and imaging in a wide range of applications such as solar cells in Dr. Ding’s lab, and corroding metals in Dr. Gateman’s lab. To combat this issue of high cost and set specifications, a simple and fast methodology for preparing UME’s was developed.

Published
2022

2. Contact Angle & Electrochemical Measurements of Metallic Atmospheric Corrosion on Copper and Carbon Steel

Author

Bunting, Jacob J.M., Joseph, Jiju M., Nie, Heng-Yong, and Gateman, Samantha M.

Subjects
Electrochemistry, Materials Chemistry, Contact Angle, Other Chemistry, Surface Roughness, Physical Chemistry, Atmospheric Corrosion, Analytical Chemistry
Abstract

Understanding atmospheric corrosion has been incredibly challenging due to the complex interplay between surface microstructures, environmental variables, and electrochemical processes. The methodology presented is being developed to apply to atmospheric corrosion models of metals and other advanced materials by observing the change in contact angle in situ as a function of corrosion parameters. Performed contact angle measurements on two industrially relevant metals (copper and carbon steel) over a 1 min to 30-day time span to track the change in wettability due to the formation of an air-formed oxide layer (aged) as a function of surface roughness.

Published
2022

9. Nanoscale Measurements of Lithium-Ion-Battery Materials using Scanning Probe Techniques.

Author

Danis, Laurence, Gateman, Samantha M, Kuss, Christian, Schougaard, Steen B., and Mauzeroll, Janine

Subjects
LITHIUM-ion batteries, SCANNING probe microscopy, ELECTROACTIVE substances, ENERGY conversion, ENERGY dissipation
Abstract

State-of-the-art scanning probe microscopy (SPM) methods as applied to energy conversion and storage devices, specifically lithium-ion batteries, are reviewed with an emphasis on the electroactive elements. The unique ability of SPM-based methods to provide localized information has proven highly valuable for the in-depth understanding of the fundamental mechanisms, processes, and degradation of lithium-ion batteries (LIBs). As such, SPM analysis is poised to play a strong role in the competition for new higher performing LIBs, especially given the unprecedented choice and availability of SPM techniques tailored to provide physical and chemical information at the nanoscale. [ABSTRACT FROM AUTHOR]

Published
2017
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10. Back Cover: Nanoscale Measurements of Lithium-Ion-Battery Materials using Scanning Probe Techniques (ChemElectroChem 1/2017).

Author

Danis, Laurence, Gateman, Samantha M, Kuss, Christian, Schougaard, Steen B., and Mauzeroll, Janine

Subjects
LITHIUM-ion batteries, SCANNING probe microscopy
Abstract

The Back Cover picture represents a paper in which scanning probe microscopy methods applied to energy conversion and storage devices (specifically lithium‐ion batteries) are reviewed, with an emphasis on the electroactive elements. More information can be found in the Review by S. B. Schougaard, J. Mauzeroll, and co‐workers on page 6 in Issue 1, 2017 (DOI: 10.1002/celc.201600571). [ABSTRACT FROM AUTHOR]

Published
2017
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11. Polymers with intrinsic microporosity (PIMs) for targeted CO 2 reduction to ethylene.

Author

Perry SC, Gateman SM, Malpass-Evans R, McKeown N, Wegener M, Nazarovs P, Mauzeroll J, Wang L, and Ponce de León C

Subjects
Catalysis, Copper, Diffusion, Electrodes, Hydrophobic and Hydrophilic Interactions, Porosity, Carbon Dioxide chemistry, Ethylenes chemistry, Polymers chemistry
Abstract

CO 2 reduction offers an attractive alternative green synthetic route for ethylene, especially where CO 2 could be sourced from industrial exhausts and in combination with green power sources. However, practical applications are currently limited due to the unfortunately low selectivity of cathode materials towards ethylene. This work uses polymers with intrinsic microporosity (PIMs) to improve the performance of copper gas diffusion electrodes for CO 2 reduction to ethylene. We report an improved selectivity and activity towards ethylene with the addition of a thin PIMs layer, which is seen as improved Faradaic efficiency, increased stability and a shift in the reduction to lower overpotential. This improvement is highly dependent on the thickness of the added polymer layer, with too thick a layer having a detrimental impact on the hydrophobicity of the gas diffusion layer. With a compromise in loading, PIMs can be used to enhance the activity and selectivity of catalysts for targeted CO 2 reduction to ethylene., (Copyright © 2020 Elsevier Ltd. All rights reserved.)

Published
2020
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