Growth of ZnO nanostructures with controllable morphology using a facile green antisolvent method

Ji Yao Dong, Yung-Jung Hsu, David Shan Hill Wong*, Shih Yuan Lu

*Corresponding author for this work

Research output: Contribution to journalArticle

70 Scopus citations

Abstract

An environmentally friendly antisolvent approach, which involves only biocompatible chemicals and mild processing conditions, was developed to prepare various ZnO nanostructures including twin-cones and nanorods with controllable dimensions. The method was based on the dissolution of ZnO powders in a deep eutectic solvent (DES), followed by precipitation of ZnO nanostructures from the DES upon introduction of an antisolvent. It is the first example of the room temperature ionic liquid based antisolvent process for preparation of nanomaterials. Through suitably modulating the processing conditions, such as the ethanol content of the antisolvent and the injection time of the ZnO-containing DES, the morphology of the resulting ZnO nanostructures can be readily controlled. Anisotropic crystal growth was achieved without severe reaction conditions, such as high temperatures and high vacuums, or use of environmentally harmful chemicals, such as long carbon chain surfactants and capping reagents. The present method can be readily extended to produce versatile nanostructures of other functional materials.

Original languageEnglish
Pages (from-to)8867-8872
Number of pages6
JournalJournal of Physical Chemistry C
Volume114
Issue number19
DOIs
StatePublished - 20 May 2010

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