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Massively Parallel Nanostructure Assembly Strategies for Sensing and Information Technology. Phase 2

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Final rept. 26 May 2010-25 May 2013

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Nanoelectronic platforms, bio-detection strategies, and nanostructured materials are capable of addressing a wide range of challenges, including real-time threat monitoring. However, assembling nanomaterials into useful structures is an overarching challenge in the field. This work has focused on the synthesis of new functional materials and the development of high-throughput, facile methods to assemble nanomaterials into useful structures and was carried out as a collaboration between Prof. Chad A. Mirkin Northwestern Univ, USA and Prof. Seunghun Hong Seoul National Univ, Korea. Specifically, gapped nanowires GNW were identified as candidate materials for synthesis and assembly as they can have programmable nanoscopic dimensions in additional to microscopic leads that facilitate electrical contact and micromanipulation. Throughout the course of this grant, we reported major accomplishments both in the synthesis and assembly of such structures. Synthetically, we report three advances 1 the development of a method for incorporating semiconducting carbon nanotubes in the gap of segmented nanowires for high sensitivity chemical sensing, 2 the transfer of sub-10 nm nanogap patterns onto functional surfaces such as graphene, and 3 the utilization of biomaterials with GNWs for energy storage and motility assays. By way of progress in the third initiative, we have developed a facile strategy for fabricating and assembling multi-segmented nanowires functionalized with various substances such as carbon nanotubes, polypyrroles and motor proteins. Functionalizing carbon nanotube bridged wires with biological receptors allowed fabrication of biosensors that could detect DNA, biotin, and hexanal, an important proof-of-concept that leads one to believe that these structures may one day bear clinical importance. Also, we have developed fabrication methods for synthesizing nano-storage wires NSWs that one can use for the real-time release of biochemical molecules.

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  • Biochemistry
  • Electrical and Electronic Equipment

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