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Dadun > Depósito Académico > Facultad de Ciencias > Departamento de Física y Matemática Aplicada > DA - Ciencias - Física - Artículos de Revista >

Quantifying disorder in colloidal films spin-coated onto patterned substrates
Autor(es) : Raheema-Muhammad, A. (Aslam)
Ardanza-Trevijano, S. (Sergio)
Poduska, K.M. (Kristin M.)
Yethiraj, A. (Anand)
González-Viñas, W. (Wenceslao)
Palabras clave : Colloids
spin-coating
Order-disorder
Persistent homology
Minkowski metrics
Image analysis
Fecha incorporación: 2017
Editorial : American Physical Society
Versión del editor: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.95.032607
ISSN: 2470-0045
Patrocinadores: R.A. acknowledges training assistance in use of the Atomic Force Microscopy from Payam Bagheri and financial support from the “Asociación de Amigos de la Universidad de Navarra.” This work is partly supported by the Spanish Ministerio de Economı́a y Competitividad (Grants No. FIS2014-54101-P and No. MTM2016-79422-P), by FEDER funds, and by the Natural Sciences and Engineering Research Council of Canada.
Cita: Raheema A, Ardanza-Trevijano S, Poduska KM, Yethiraj A, González-Viñas W. Quantifying disorder in colloidal films spin-coated onto patterned substrates. Phys. Rev. E 2017;95(3):032607.
Resumen
Polycrystals of thin colloidal deposits, with thickness controlled by spin-coating speed, exhibit axial symmetry with local 4-fold and 6-fold symmetric structures, termed orientationally correlated polycrystals (OCPs). While spin-coating is a very facile technique for producing large-area colloidal deposits, the axial symmetry prevents us from achieving true long-range order. To obtain true long-range order, we break this axial symmetry by introducing a patterned surface topography and thus eliminate the OCP character. We then examine symmetry- independent methods to quantify order in these disordered colloidal deposits. We find that all the information in the bond-orientational order parameters is well captured by persistent homology analysis methods that only use the centers of the particles as input data. It is expected that these methods will prove useful in characterizing other disordered structures.
Enlace permanente: http://hdl.handle.net/10171/43219
Aparece en las colecciones: DA - Ciencias - Física - Artículos de Revista

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Fichero:  Aslam2017.pdf
Descripción:  Article
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Fichero:  Aslam2017.bib
Descripción:  Bibtex file
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