Shaomin Wu et al 2009 Nanotechnology 20 285312 doi:10.1088/0957-4484/20/28/285312
Shaomin Wu1, Li-Hsin Han2 and Shaochen Chen2
Show affiliationsWe demonstrate a new technique for selectively growing gold nanoparticles on a patterned three-dimensional (3D) polymer microstructure. The technique integrates 3D direct writing of heterogeneous microstructures with nanoparticle synthesis. A digital micromirror device is employed as a dynamic mask in the digital projection photopolymerization process to build the heterogeneous microstructure layer by layer. An amine-bearing polyelectrolyte, branched poly(ethylenimine), is selectively attached to the microstructure and acts as both a reducing and a protective agent in the nanoparticle synthesis. Scanning electron microscopy, energy dispersive x-ray spectroscopy and x-ray photoelectron spectroscopy are utilized to analyze the microstructure and the 3D selectivity of the nanoparticle growth.
81.07.Bc Nanocrystalline materials
82.80.Ej X-ray, Mössbauer, and other gamma-ray spectroscopic analysis methods
79.60.Jv Interfaces; heterostructures; nanostructures
Soft matter, liquids and polymers
Condensed matter: electrical, magnetic and optical
Surfaces, interfaces and thin films
Issue 28 (15 July 2009)
Received 22 February 2009, in final form 10 May 2009
Published 23 June 2009
Shaomin Wu et al 2009 Nanotechnology 20 285312
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