Surfactant-Assisted Elimination of a High Energy Facet as a Means of Controlling the Shapes of TiO2 Nanocrystals

J. Am. Chem. Soc., 125 (51), 15981 -15985, 2003. 10.1021/ja0369515 S0002-7863(03)06951-8
Web Release Date: November 26, 2003

Surfactant-Assisted Elimination of a High Energy Facet as a Means of Controlling the Shapes of TiO₂ Nanocrystals

Young-wook Jun, Maria F. Casula, Jae-Hwan Sim, Sang Youl Kim,* Jinwoo Cheon,* and A. Paul Alivisatos*

Contribution from the Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, Korea Advanced Institute of Science and Technology (KAIST), Taejon 305-701, Korea, and Yonsei University, Seoul 120-749, Korea

sykim@kaist.ac.kr; jcheon@alchemy.yonsei.ac.kr; alivis@uclink4.berkeley.edu

Received June 27, 2003

Abstract:

The surfactant-mediated shape evolution of titanium dioxide anatase nanocrystals in nonaqueous media was studied. The shape evolves from bullet and diamond structures to rods and branched rods. The modulation of surface energies of the different crystallographic faces through the use of a surface selective surfactant is the key parameter for the shape control.

Download the full text: PDF | HTML