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Issue 102, 2016, Issue in Progress
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Highly stable electrical manipulation of reflective colors in colloidal crystals of sulfate iron oxide particles in organic media

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Abstract

Monodisperse Fe3O4 particles are prepared by solvothermal reaction, in which negatively charged sulfate groups are formed on the surface by adding potassium sulfate during the high-pressure reaction. Then, those particles are successfully dispersed in the polar solvent propylene carbonate and manipulated electrophoretically between transparent electrodes. By applying an external electric field, they showed structural colors which can be tuned precisely over the visible range depending on the strength of the electric field. Because sulfate groups on the particle surface are chemically stable or inert, those particles are highly stable against irreversible deposition on the electrode during electrophoretic operation. Therefore, we demonstrate highly stable color switches over at least hundreds of cyclic operations, which may be useful in real electronic paper display applications.

Graphical abstract: Highly stable electrical manipulation of reflective colors in colloidal crystals of sulfate iron oxide particles in organic media

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Publication details

The article was received on 19 Aug 2016, accepted on 14 Oct 2016 and first published on 14 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA20849E
Citation: RSC Adv., 2016,6, 100167-100173
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    Highly stable electrical manipulation of reflective colors in colloidal crystals of sulfate iron oxide particles in organic media

    H. Lee, S. Kim, H. Lee, K. H. Park, Y. Kim and G. Yi, RSC Adv., 2016, 6, 100167
    DOI: 10.1039/C6RA20849E

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