Aqueous transfer of colloidal metal oxide nanocrystals via base-driven ligand exchange†
Vikram S.
Lakhanpal, 
a
Benjamin Z.
Zydlewski,
b
Xing Yee
Gan,
a
Hugo
Celio,
c
Charles K.
Ofosu
b
and
Delia J.
Milliron
*ab
a
Benjamin Z.
Zydlewski,
b
Xing Yee
Gan,
a
Hugo
Celio,
c
Charles K.
Ofosu
b
and
Delia J.
Milliron
*ab
Abstract
A general method is developed for removal of native nonpolar oleate ligands from colloidal metal oxide nanocrystals of varying morphologies and compositions. Ligand stripping occurs by phase transfer into potassium hydroxide solution, yielding stable aqueous dispersions with little nanocrystal aggregation and without significant changes to the nanomaterials’ physical or chemical properties. This method enables facile fabrication of conductive films of ligand-free nanocrystals.
- This article is part of the themed collection: Celebrating 10 years of ChemComm Emerging Investigators
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