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Nanosurfer Flash-mobs: Electric-Field-Choreographed Silver Migration on Graphene Oxide

Abstract

We present for the first time the ability to direct and control the migrating path of silver nanoparticle across graphene oxide (GO). With the help of a focused laser beam, we demonstrated choreographed nanoparticle assembly on the GO via directed electric-field. Silver migration and the resultant dendrite formation on GO was characterized through electrical testing coupled with Fluorescence Microscopy. The proposed mechanism for silver migration in the GO involves the interlayer water between GO sheets serving as the electrolyte for the electrochemical process. This interlayer water facilitates the disappearance of dendrites through oxidation and dissolution into the water. Furthermore, we demonstrate that the shape of Ag dendrite formation can be controlled a combination of applied electric field and patterned regions of reduced GO film created by focused laser beam. This paves the way to an alternative low-cost silver nanoparticle assembly method requiring only a low-powered laser and low voltage.

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Publication details

The article was received on 10 Mar 2019, accepted on 06 Apr 2019 and first published on 11 Apr 2019


Article type: Paper
DOI: 10.1039/C9NA00151D
Citation: Nanoscale Adv., 2019, Accepted Manuscript
  • Open access: Creative Commons BY license
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    Nanosurfer Flash-mobs: Electric-Field-Choreographed Silver Migration on Graphene Oxide

    J. Y. H. Leow, P. Y. X. Lim, S. X. Lim, J. Wu and C. H. Sow, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C9NA00151D

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