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A deep look into the spray coating process in real-time-the crucial role of x-rays
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. Deutsches Elektronen-Synchrotron (DESY), Germany.
2016 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 28, no 40, 403003Article, review/survey (Refereed) Published
Abstract [en]

Tailoring functional thin films and coating by rapid solvent-based processes is the basis for the fabrication of large scale high-end applications in nanotechnology. Due to solvent loss of the solution or dispersion inherent in the installation of functional thin films and multilayers the spraying and drying processes are strongly governed by non-equilibrium kinetics, often passing through transient states, until the final structure is installed. Therefore, the challenge is to observe the structural build-up during these coating processes in a spatially and time-resolved manner on multiple time and length scales, from the nanostructure to macroscopic length scales. During installation, the interaction of solid-fluid interfaces and between the different layers, the flow and evaporation themselves determine the structure of the coating. Advanced x-ray scattering methods open a powerful pathway for observing the involved processes in situ, from the spray to the coating, and allow for gaining deep insight in the nanostructuring processes. This review first provides an overview over these rapidly evolving methods, with main focus on functional coatings, organic photovoltaics and organic electronics. Secondly the role and decisive advantage of x-rays is outlined. Thirdly, focusing on spray deposition as a rapidly emerging method, recent advances in investigations of spray deposition of functional materials and devices via advanced x-ray scattering methods are presented.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2016. Vol. 28, no 40, 403003
Keyword [en]
spray deposition, functional coatings, grazing incidence x-ray scattering, organic photovoltaics, organic electronics, in situ
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-193983DOI: 10.1088/0953-8984/28/40/403003ISI: 000383804500003PubMedID: 27537198ScopusID: 2-s2.0-84988328396OAI: diva2:1037160

QC 20161014

Available from: 2016-10-14 Created: 2016-10-14 Last updated: 2016-10-14Bibliographically approved

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