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Self-assembled peptide nanotubes for electronics and sensor devices

Bai, Hanying and Matsui, Hiroshi and De La Rica, Roberto (2009) Self-assembled peptide nanotubes for electronics and sensor devices. In: The 237th ACS National Meeting, 2009-03-22 - 2009-03-26.

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Abstract

Non-lithographic fabrications of devices such as electronics and sensor have been studied extensively by assembling nanometer-sized building blocks into the device configurations. While various nanowires and nanoparticles with superior physical properties have been synthesized as the building blocks, more reproducible methods to assemble them onto precise positions are desirable to construct nanodevices. We developed peptide nanotubes as multifunctional smart building blocks. We designed these nanotubes to incorporate biomolecular recognition components (antibody), and our strategy is to use those functionalized peptide nanotubes, which can recognize and selectively bind a well-defined region on antigen-patterned substrates, as building blocks to assemble nanoscale architectures at uniquely defined positions. In order for the application in electric device fabrications, after configuring device geometries with these nanotubes by the biomolecular recognition, we turned on the biomineralization function of peptides on the nanotube sidewall to develop various material coatings such as metals and semiconductors for electronics and sensor applications. It should be noted that the coating morphology such as particle-domain size and inter-particle distance on the nanotubes could be tuned by peptide sequences and conformations. Due to these peptides' catalytic function, some semiconductor coatings could be developed at room temperature on the nanotube.