Zhou, Wei

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2002 - 20073
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  • Publication
    From Fundamental Understanding to Predicting New Nanomaterials for High-Capacity Hydrogen Storage
    (2007-03-09) Zhou, Wei; Simmons, Jason; Fischer, John E; Yildirim, Taner
    • H2-Storage Materials: Current Impasse • Promising Hybrid Materials • Direct Adsorption Measurements • Neutron Scattering Capabilities • First Principles Calculations • Use a combination of experimental and theoretical studies to understand the detailed guest-host interactions in novel storage materials • Armed with this, develop advanced guest-host materials that can meet the DOE hydrogen storage challenge
  • Publication
    Macroscopic Neat Single-Walled Carbon Nanotubes Fibers
    (2004-09-03) Ericson, Lars M; Fan, Hua; Zhou, Wei; Peng, Haiqing; Davis, Virginia A; Sulpizio, Joseph; Wang, Yuhuang; Guthy, Csaba; Booker, Richard; Vavro, Juraj; Parra-Vasquez, A. Nicholas G; Kim, Myung Jong; Ramesh, Sivarajan; Saini, Rajesh K; Kittrell, Carter; Lavin, Gerry; Schmidt, Howard; Adams, W. Wade; Billups, W. E; Pasquali, Matteo; Fischer, John E; Hwang, Wen-Fang; Hauge, Robert H; Smalley, Richard E
    The first-ever well-aligned continuous macroscopic neat single-walled carbon nanotube (SWNT) fibers were produced using conventional spinning techniques. Neat SWNT fibers, containing no surfactant or polymer, were made by spinning dispersions of SWNTs in 102% sulfuric acid into different coagulants. The critical role of sulfuric acid in dispersing and aligning SWNTs during fiber formation has been explored. Characterization shows alignment greater than any other macroscopic neat SWNT material reported to-date while providing insight into the fundamental hierarchy and nature of SWNT fiber formation. Electrical, thermal, and mechanical measurements indicate that neat SWNT fibers hold tremendous potential for future applications.
  • Publication
    Preferred orientation in fibers of HiPco single wall carbon nanotubes from diffuse x-ray scattering
    (2002-12-02) Zhou, Wei; Winey, Karen I; Fischer, John E; Ramesh, Sivarajan; Saini, Rajesh K.; Ericson, Lars M; Davis, Virginia A.; Pasquali, M.; Hauge, Robert H; Smalley, Richard E.
    Neat Fibers of HiPco single wall carbon nanotubes extruded from strong acid suspensions exhibit preferred orientation along fiber axes. We characterize the extrusion-induced alignment using x-ray fiber diagrams and polarized Raman scattering, using a model which allows for some fraction of the sample to remain completely unaligned. We show that both x-ray and Raman data are required for a complete texture analysis of SWNT fibers.