Abstract
Patterning ordered nanoparticle arrays is crucial for the fascinating collective properties of nanoparticles. Block copolymer template provides us a platform for the simple and efficient assembly of nanoparticle arrays. In this work, cylinder-forming poly(styrene-block-2-vinylpyridine) thin film was firstly plasma-etched to expose poly(2-vinylpyridine) cylinders. Then the templates were cross-linked by small molecules so as to access gold nanoparticle arrays with both high density and excellent position selectivity. The cross-linking process significantly restrains the unfavorable surface reconstruction of the thin film. It is demonstrated that the quality of the nanoparticle array was affected by the degree of the cross-linking and the immersion time in nanoparticle solution. The highly ordered gold nanoparticle arrays are promising in several fields such as optics and surface enhanced Raman scattering (SERS).
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