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The Controlled Evolution of a Polymer Single Crystal

2005; American Association for the Advancement of Science; Volume: 307; Issue: 5716 Linguagem: Inglês

10.1126/science.1109487

1095-9203

Xiaogang Liu, Yi Zhang, D. K. Goswami, John Okasinski, Khalid Salaita, Peng Sun, Michael J. Bedzyk, Chad A. Mirkin,

Molecular Junctions and Nanostructures

We present a method for controlling the initiation and kinetics of polymer crystal growth using dip-pen nanolithography and an atomic force microscope tip coated with poly- dl -lysine hydrobromide. Triangular prisms of the polymer epitaxially grow on freshly cleaved mica substrates, and their in-plane and out-of-plane growth rates can be controlled by raster scanning the coated tip across the substrate. Atomic force microscope images were concomitantly recorded, providing a set of photographic images of the process as it spans the nanometer- to micrometer-length scales as a function of environmental conditions.