Insight into Nanoparticle Charging Mechanism in Nonpolar Solvents To Control the Formation of Pt Nanoparticle Monolayers by Electrophoretic Deposition

Ondřej Černohorský; Jan Grym; Roman Yatskiv; Viet Hung Pham; James H Dickerson

doi:10.1021/acsami.6b04746

Insight into Nanoparticle Charging Mechanism in Nonpolar Solvents To Control the Formation of Pt Nanoparticle Monolayers by Electrophoretic Deposition

ACS Appl Mater Interfaces. 2016 Aug 3;8(30):19680-90. doi: 10.1021/acsami.6b04746. Epub 2016 Jul 20.

Authors

Ondřej Černohorský¹, Jan Grym¹, Roman Yatskiv¹, Viet Hung Pham², James H Dickerson^{2

3}

Affiliations

¹ Institute of Photonics and Electronics, Czech Academy of Sciences , Chaberská 57, Prague, 18251, Czech Republic.
² Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States.
³ Department of Physics, Brown University , Providence, Rhode Island 02912, United States.

PMID: 27388040
DOI: 10.1021/acsami.6b04746

Abstract

We report on the formation of Pt nanoparticle monolayers by electrophoretic deposition from nonpolar solvents. First, the growth kinetics of Pt nanoparticles prepared by the reverse micelle technique are described in detail. Second, a model of nanoparticle charging in nonpolar media is discussed and methods to control the nanoparticle charging are proposed. Finally, essential parameters of the electrophoretic deposition process to control the deposition of nanoparticle monolayers are discussed and mechanisms of their formation are analyzed.

Keywords: 3D growth; AOT reverse micelles; Frank van der Merwe layer-by-layer growth; Pt nanoparticles; electrophoretic deposition; nanoparticle charging; nanoparticle monolayers; nonpolar suspensions.