Journal
NANOTECHNOLOGY
Volume 20, Issue 28, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/28/285312
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Funding
- US National Science Foundation
- Office of Naval Research
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1109591, 1115903] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1106487] Funding Source: National Science Foundation
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We 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.
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