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J Am Chem Soc. 2003 Mar 5;125(9):2697-704.

Complex alpha-MoO(3) nanostructures with external bonding capacity for self-assembly.

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  • 1Department of Chemical and Environmental Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.


Through manipulating crystal growth directions, we devised a versatile synthetic method to fabricate complex alpha-MoO(3) nanostructures with external bonding capacity for self-organization. Using four-armed forklike alpha-MoO(3) as nanobuilding blocks, we assembled more complex crystal morphologies, such as centrally holed nanorods, tridents, and paintbrushes. With prolonged ultrasonic treatments, pristine forklike alpha-MoO(3) crystals can be turned into less armed nanostructures, giving away the secondary arms (width < 100 nm) at the same time. On the other hand, the resultant alpha-MoO(3) itself can act as a template to produce shaped TiO(2) and other nanocrystals. Square- and horseshoe-shaped nanocrystals of anatase TiO(2) are left undissolved after removing alpha-MoO(3) templates in basic medium.

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