Kämäräinen T, Ago M, Seitsonen J, Raula J, Kauppinen EI, Ruokolainen J, Rojas OJ (2018)
Publication Type: Journal article
Publication year: 2018
Book Volume: 14
Pages Range: 3387-3396
Journal Issue: 17
DOI: 10.1039/c8sm00383a
Wrinkling of colloidal particles alter a wide variety of interfacial properties but quantitative topographical descriptions have been explored experimentally to a very limited extent. In this study, we present a harmonic analysis of surface wrinkles and folds on submicron colloidal particles, obtained using an aerosol flow route, with small radius (<300 nm) and high crust thickness-to-radius ratio (>0.1). The particle surface coordinates were mapped in their entirety using cryo-electron tomography and subsequently reconstructed using spherical harmonics, allowing a spectral topographical description of the instability patterns and the identification of their surface modes by lateral wavelength. Wrinkled and crumpled particles showed a similar surface roughness spectrum, wherein differences were found most noticeable in the large wavelength region. The analysis of preferred directions of harmonic frequencies indicated a possible axial or planar alignment attributed to the directionality of the surface corrugations. The employed characterization methodology can further the study of topographical influences on colloidal interactions.
APA:
Kämäräinen, T., Ago, M., Seitsonen, J., Raula, J., Kauppinen, E.I., Ruokolainen, J., & Rojas, O.J. (2018). Harmonic analysis of surface instability patterns on colloidal particles. Soft Matter, 14(17), 3387-3396. https://doi.org/10.1039/c8sm00383a
MLA:
Kämäräinen, Tero, et al. "Harmonic analysis of surface instability patterns on colloidal particles." Soft Matter 14.17 (2018): 3387-3396.
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