Nanoparticles are engineered for applications including dual sensors and targeted drug delivery. In order to access novel nanomaterials an understanding of nanoparticle manipulation must be obtained. Immobilized 2-D nanoparticle arrays provide a platform for nanoparticle engineering. In this project, ligand stabilized gold nanoparticles are synthesized and characterized with SAXS, TEM and XPS. Deposition of these nanoparticles creates controlled nanoparticle arrays. The arrays are modified by exposing and subsequently passivating the catalytically active core without comprising the size or dispersion of the nanoparticles. First, surface ligands are selectively removed. Nanoparticle catalytic activity is then re-protected through ligand shell restoration. Finally, the removed ligand shell can be back-filled with new functionality for extended application. Changes to these 2-D nanoparticle arrays are monitored using TEM and XPS, allowing investigation of spatial and chemical changes. These processes are foundational for synthesis of precise nanoparticle building blocks; further investigation will significantly improve advanced nanomaterial development.

Modification of 2D nanoparticle arrays

243rd National Meeting (2012)

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