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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]

[img] 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.

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[img] Plain Text (Readme file)
2019-06-13 readme text for WRAP.txt - Published Version
Available under License Creative Commons Attribution 4.0.

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Official URL: http://wrap.warwick.ac.uk/118640

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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
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Faculty of Science, Engineering and Medicine > Science > Physics
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: University of Warwick, School of Engineering
Official Date: 13 May 2019
Dates:
DateEvent
13 May 2019Published
Status: Not Peer Reviewed
Publication Status: Published
Media of Output (format): .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.

RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/M024911/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/R511808/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/N509796/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/L015307/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/M022196/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
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  • Related item in WRAP
Contributors:
ContributionNameContributor ID
DepositorMurphy, John D.55925

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