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Bionanosphere lithography.

Biomolecular self-assembly is a powerful approach for novel, benign nanoscale processing. Nevertheless, the weak material properties of biomolecular assembly, including low thermal/chemical stability, limit its utilization in conjunction with conventional device fabrication processes. In this study by Kim et al., bionanosphere lithography is introduced as a novel biomoleuclar-assembly-based nanolithography technique that is compatible with conventional device fabrication. An aromatic peptide of N-(t-Boc)-terminated triphenylalanine, inspired from a structural motif for the [beta]-amyloid associated with Alzheimer's disease, is designed. This peptide adopts a conformation with three phenyl rings oriented outward, which mediate intermolecular [pi]-[pi] stacking interactions and eventually facilitate highly crystalline bionanosphere assembly with thermal and chemical stabilities. The self-assembled bionanospheres spontane ously close-pack into a hexagonal monolayer at the evaporating solvent edge, constituting evaporation-induced hierarchical self-assembly. Metal nanoparticle arrays or embossed Si nanoposts could be successfully created from the hexagonal bionanosphere array masks via conventional metal evaporation or etching.

S. O. Kim et al., Small

DOI: 10.1002/smll.200902050
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Title Annotation:Materials Views
Author:Ladden, S.
Publication:Plastics Engineering
Article Type:Brief article
Geographic Code:1USA
Date:May 1, 2010
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