English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Manufacturing nanoparticles with orthogonally adjustable dispersibility in hydrocarbons, fluorocarbons, and water

MPS-Authors
There are no MPG-Authors available
External Resource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Zeininger, L., Stiegler, L., Portilla, L., Halik, M., & Hirsch, A. (2018). Manufacturing nanoparticles with orthogonally adjustable dispersibility in hydrocarbons, fluorocarbons, and water. ChemistryOpen, 7(4), 282-287. doi:10.1002/open.201800011.


Cite as: http://hdl.handle.net/21.11116/0000-0005-4609-3
Abstract
We describe a universal wet-chemical shell-by-shell coating procedure resulting in colloidal titanium dioxide (TiO2) and iron oxide (Fe3O4) nanoparticles with dynamically and reversibly tunable surface energies. A strong covalent surface functionalization is accomplished by using long-chained alkyl-, triethylenglycol-, and perfluoroalkylphosphonic acids, yielding highly stabilized core–shell nanoparticles with hydrophobic, hydrophilic, or superhydrophobic/fluorophilic surface characteristics. This covalent functionalization sequence is extended towards a second noncovalent attachment of tailor-made nonionic amphiphilic molecules to the pristine coated core–shell nanoparticles via solvophobic (i.e. either hydrophobic, lipophobic, or fluorophobic) interactions. Thereby, orthogonal tuning of the surface energies of nanoparticles via noncovalent interactions is accomplished. As a result, this versatile bilayer coating process enables reversible control over the colloidal stability of the metal oxide nanoparticles in fluorocarbons, hydrocarbons, and water. © 2017 The Authors. Published by Wiley-VCH Verlag GmbH Co. KGaA.