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Nanofilaments: Interfacial, Interactions, Manipulation and Assembly

The objective is to develop the capacity to reproducibly grow and manipulate nanofilaments of different materials, and with specific, tailorable materials properties, for use in Navy materials, emitter, sensor and electronics applications. Sub-objectives include:

  1. Develop methods for chemical vapor deposition (CVD) growth of nanofilaments with specific morphological and electronic characteristics at a predetermined location on a well-defined surface;

  2. Develop techniques for selective placement of existing nanofilaments on well-defined surface sites;

  3. Elucidate the basic physics and chemistry of nanofilamentary structures so as to exploit them as potential components in 21st century materials and devices for Navy applications.

We will investigate the growth mechanisms and factors governing gas phase chemistry needed for large scale synthesis of optimal nanotube morphologies for fuel cells and hydrogen storage devices. The primary focus will be on nanotubes, but the chemical behavior of other carbon nanostructures will provide additional understanding of hydrogen storage. We will design and develop synthetic routes to preceramic transition-metal based polymers or compounds, which are liquid or low melting solids and contain carbon, silicon and/or boron. These systems will be converted to shaped, crosslinked polymeric materials. Ceramics with transition-metal nanoparticles embedded in the matrix will be obtained by pyrolyzing the polymeric material. The materials will be characterized to determine their properties. Selected thermosets and ceramics will be used for novel nanotube synthesis by electric arc and laser methods.

Contact the Principal Investigator, Pehr Pehrsson, for more information


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