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Data for Exceptional surface passivation arising from bis(trifluoromethanesulfonyl)-based solutions
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Pointon, A. I., Grant , Nicholas E., Bonilla, R. S., Wheeler-Jones, Evé, Walker, Marc, Wilshaw, P. R., Dancer, Claire E. J. and Murphy, John D. (2019) Data for Exceptional surface passivation arising from bis(trifluoromethanesulfonyl)-based solutions. [Dataset]
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Microsoft Excel (Data underpinning Figs 1-5 in related publication)
2019-06-13 Dataset.xlsx - Published Version Available under License Creative Commons Attribution 4.0. Download (12Mb) |
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Plain Text (Readme file)
2019-06-13 readme text for WRAP.txt - Published Version Available under License Creative Commons Attribution 4.0. Download (615b) |
Abstract
The surface properties of many inorganic electronic materials (e.g. MoS2, WSe2, Si) can be substantially modified by treatment with the superacid bis(trifluoromethane)sulfonimide (TFSI). Here we find more generally that solutions based on molecules with trifluoromethanesulfonyl groups, including TFSI, give rise to excellent room temperature surface passivation, with the common factor being the presence of CF3SO2 groups and not the solution’s acidity. The mechanism of passivation comprises two effects: (i) chemical passivation; and (ii) field effect passivation from a negatively charged thin film likely to be physically adsorbed by the surface. Degradation of surface passivation is caused by de-adsorption of the thin film from the surface, and occurs slowly in air and rapidly upon vacuum exposure. The passivation’s air stability is enhanced by the presence of droplets at the surface which act to protect the properties of the film. The finding that non-acidic solutions can provide excellent electrical passivation at room temperature opens up the possibility of using them on materials more sensitive to an acidic environment.
| Item Type: | Dataset | ||||||||||||||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > Engineering Faculty of Science > Physics |
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| Type of Data: | Data underpinning figures in related publication | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Passive components, Passivity (Chemistry), Electronics -- Materials, Surfaces, Superacids, Luminescence | ||||||||||||||||||
| Publisher: | School of Engineering, University of Warwick | ||||||||||||||||||
| Official Date: | 13 May 2019 | ||||||||||||||||||
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| Media of Output: | .xlsx | ||||||||||||||||||
| Copyright Holders: | University of Warwick | ||||||||||||||||||
| Description: | The dataset (a single file in XLSX format) contains the data behind the figures in the paper. Captions to the figures are given in the paper. Abbreviations, variables and methods used are defined in the paper. |
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