Hidden Involvement of Liquids and Gases in Electrostatic Charging
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Case Western Reserve University School of Graduate Studies / OhioLINK
2021
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=case162312024539738 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-case1623120245397382021-09-08T05:10:08Z Hidden Involvement of Liquids and Gases in Electrostatic Charging Heinert, Carter J. Chemical Engineering Engineering Electrical Engineering Electrostatics Kelvin Force Microscopy Evaporation Solvents Gas Phase Ions Charge Decay Many aspects of electrostatics remain poorly understood, especially in regards to how liquids and gases effect surface charge. We discovered a previously unknown phenomenon where a solvent evaporating off of a surface in an electric field leaves behind an electrostatic charge. Our experiments determined that this charge was first inducted into the liquid film before being trapped on the surface after the liquid evaporates. Using Kelvin Force Microscopy (KFM) and an interdigitated electrode (IDE), we were able to recreate the experiment on the microscopic scale. We were able to use the “evaporation charging” effect to create bipolar charge mosaics, where the surface charge varies by magnitude and polarity in a distance of microns. Additionally, we tested how gas phase ions can discharge a surface through the use of a levitating charged sample. By measuring the change in the sample’s electrostatic potential, we were able to determine the rate of charge decay due solely to gas phase ions. Using our experimental data, we developed a model that accounts for this decay by considering how the geometry of the charged surface creates an electric field in a volume of air that ions can be drawn from. The results of all of these experiments show that liquids and gases play a larger-than-expected role in electrostatics and the failure to fully comprehend their effects may account for why so many electrostatic experiments are difficult to reproduce. 2021-09-01 English text Case Western Reserve University School of Graduate Studies / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=case162312024539738 http://rave.ohiolink.edu/etdc/view?acc_num=case162312024539738 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Chemical Engineering Engineering Electrical Engineering Electrostatics Kelvin Force Microscopy Evaporation Solvents Gas Phase Ions Charge Decay |
| spellingShingle |
Chemical Engineering Engineering Electrical Engineering Electrostatics Kelvin Force Microscopy Evaporation Solvents Gas Phase Ions Charge Decay Heinert, Carter J. Hidden Involvement of Liquids and Gases in Electrostatic Charging |
| author |
Heinert, Carter J. |
| author_facet |
Heinert, Carter J. |
| author_sort |
Heinert, Carter J. |
| title |
Hidden Involvement of Liquids and Gases in Electrostatic Charging |
| title_short |
Hidden Involvement of Liquids and Gases in Electrostatic Charging |
| title_full |
Hidden Involvement of Liquids and Gases in Electrostatic Charging |
| title_fullStr |
Hidden Involvement of Liquids and Gases in Electrostatic Charging |
| title_full_unstemmed |
Hidden Involvement of Liquids and Gases in Electrostatic Charging |
| title_sort |
hidden involvement of liquids and gases in electrostatic charging |
| publisher |
Case Western Reserve University School of Graduate Studies / OhioLINK |
| publishDate |
2021 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=case162312024539738 |
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AT heinertcarterj hiddeninvolvementofliquidsandgasesinelectrostaticcharging |
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1719478604154273792 |