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Until now, research efforts focused on electrochemical conversion of carbon dioxide into stable carbon-based materials have been limited by poor understanding of catalytic effects occurring at surfaces. Here, we demonstrate the capability to simultaneously use atomic layer deposition (ALD), electrode composition control, and current density as a means to direct the formation of iron-based catalysts...
Here we demonstrate the growth of three-dimensional foams of defect-containing helical carbon nanofibers for application in efficient sodium ion battery anodes. Using pretreated Ni nanowire templates, over 3500% growth yield is observed for helical CNF foam materials, which can be directly incorporated into a sodium-ion battery anode. Our work demonstrates that the tortuous bends in helical CNFs provide...
We report results from characterization studies focused on a diverse selection of catalyst support materials in order to understand what makes a good catalyst support during carbon nanotube (CNT) carpet growth via water-assisted chemical vapor deposition. The growth and catalyst morphological changes occurring for thin Fe layers deposited on Al 2 O 3 , MgO, TiN, and ZrO 2 are...
We demonstrate the fabrication of solid-state dielectric energy storage materials from self-assembled, aligned single-walled carbon nanotube arrays (VA-SWNTs). The arrays are transferred as intact structures to a conductive substrate and the nanotubes are conformally coated with a thin metal-oxide dielectric and a conductive counter-electrode layer using atomic layer deposition. Experimental results...
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