Improved inverted bubble method for measuring small contact angles at crystal-solution-vapor interfaces
Abstract
We propose and evaluate an improvement of the inverted bubble method, originally proposed by McLachlan and Cox [Rev. Sci. Instrum. 46, 80 (1975)], a technique for measuring small contact angles at crystal-solution-vapor interfaces on a gas bubble under a solid immersed in a test solution. A simple experimental setup is used to evaluate the proposed method. We conclude that the method is suitable for measuring small contact angles with a minimum detectable angle of about 3 degrees . Improvements in instrument design are proposed to lower the detection limit to 0.5 degrees or below.
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Aqueous H2SO4 droplets on alumina single crystals have contact angles of around 30°.
“Figure S3 in Supporting Information S1 shows that aqueous H 2 SO4 droplets on alumina single crystals have contact angles of around 30° (Corti & Krieger, 2007; McLachlan & Cox, 1975; Thomason & Peter, 2006).”
From Chemical Impact of Stratospheric Alumina Particle Injection for Solar Radiation Modification and Related Uncertainties (2023) · cites this paper as Corti & Krieger, 2007
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Vattioni, S., Luo, B., Feinberg, A., Stenke, A., Vockenhuber, C., Weber, R., Dykema, J. A., Krieger, U. K., Ammann, M., Keutsch, F., et al. (2023) · Geophysical Research Letters · doi:10.1029/2023gl105889 · Cited by 26 · see citing works
“Figure S3 in Supporting Information S1 shows that aqueous H 2 SO 4 droplets on alumina single crystals have contact angles of around 30° (Corti & Krieger, 2007; McLachlan & Cox, 1975; Thomason & Peter, 2006).”
BackgroundSelf-citation
- Authors
- Corti, T., & Krieger, U. K.
- Affiliations
- ETH Zurich (CH)
- Institute for Atmospheric and Climate Science (CH)
- ORCID
- Krieger, Ulrich K.
- Venue
- Applied Optics
- Publisher
- Optica Publishing Group
- Published
- 2007-08-09
- Volume
- 46
- Issue
- 23
- Pages
- 5835
- ISSN
- 0003-6935 (ISSN-L)
- 1539-4522
- OpenAlex
- W2051238779
- Cited by
- 16
- References
- 0
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 3 · 2023: 2 · 2022: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2014: 1
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Optics (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Surfaces, Coatings and Films › Surface Modification and Superhydrophobicity
- Physical Sciences › Environmental Science › Water Science and Technology › Minerals Flotation and Separation Techniques
- Physical Sciences › Engineering › Computational Mechanics › Fluid Dynamics and Heat Transfer
- Keywords
- contact angle measurement, gas bubbles, instrument design, detection limit
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