Micropatterning of Polymer-Embedded Metal Nanoparticles by an Ion Beam Contact Lithography
A convenient and effective method to pattern polymer-embedded metal nanoparticles by ion irradiation has been developed. The thin Pluronic films containing silver nitrate as a precursor of silver nanoparticles were irradiated through a pattern mask with accelerated proton (H+) ions. It was found from the UV-Vis measurement that the formation of silver nanoparticles in the Pluronic matrix was dependant on the amount of silver nitrate. The 50 μm line (pitch 150 μm) patterns of the Pluronic containing silver nanoparticles were obtained with the thin film irradiated to 1 × 1016 ions/cm2. The heat treatment effect on the morphology of the patterns was investigated by using a scanning electron microscope with an energy dispersive X-ray spectrometer. The results confirmed that the silver nanoparticles were successfully embedded in the Pluronic patterns and the patterns were changed into large silver particles by a heat treatment above 350 °C.
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Document Type: Research Article
Publication date: 2010-10-01
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