Skip to main content

16 Result(s)

within B. C. Bunker Remove this filter

and

  1. No Access

    Article

    Ratchet patterns sort molecular shuttles

    Molecular shuttles based on microtubules propelled by motor proteins can be guided on surfaces by adsorbing motors in chemical patterns or by using open guiding channels. While chemical patterns can guide micr...

    H. Hess, J. Clemmens, C.M. Matzke, G.D. Bachand, B.C. Bunker, V. Vogel in Applied Physics A (2002)

  2. No Access

    Article

    The influence of coating structure on micromachine stiction

    Stiction and friction in micromachines is commonly inhibited through the use of silane coupling agents such as 1H-, 1H-, 2H-, 2H-perfluorodecyltrichlorosilane (FDTS). FDTS coatings have allowed micromachine pa...

    J.G. Kushmerick, M.G. Hankins, M.P. de Boer, P.J. Clews, R.W. Carpick… in Tribology Letters (2001)

  3. No Access

    Article

    Evaluation of Thermally Converted Silicotitanate Waste Forms

    Crystalline silicotitanate ion exchangers are highly selective for separating Cs from Narich waste streams. However, use of these ion exchangers for removal of Cs from radioactive tank waste will result in lar...

    Y. Su, M. L. Balmer, L. Wang, B. C. Bunker, M. Nyman… in MRS Online Proceedings Library (1999)

  4. No Access

    Article

    Colloidal Agglomerates in Tank Sludge and Their Impact on Waste Processing

    Disposal of millions of gallons of existing radioactive wastes in underground storage tanks is a major remediation activity for the United States Department of Energy. These wastes include a substantial volume...

    J. M. Tingey, B. C. Bunker, G. L. Graff, K. D. Keeper… in MRS Online Proceedings Library (1999)

  5. No Access

    Article

    Formal Charge Model for Predicting Structures, Acid-Base, and Ion Exchange Properties of Mixed Oxides

    The range of mixed-oxide materials used in ion exchange and catalytic materials is rapidly expanding from aluminosilicates such as zeolites and clays into materials whose structure and chemical properties are ...

    B. C. Bunker in MRS Online Proceedings Library (1996)

  6. No Access

    Article

    The Structure and Properties of Two New Silicotitanate Zeolites

    Two new zeolitic crystalline phases with stoichiometry, CSTiSi2O6.5 and CS2TiSi6O15, have been discovered. CSTiSi2O6.5 has a crystal structure isomorphous to the mineral pollucite, CsAlSi2O6, with Ti+4 replacing ...

    M. L. Balmer, Y. Su, I. E. Grey, A. Santoro, R. S. Roth… in MRS Online Proceedings Library (1996)

  7. No Access

    Article

    17O NMR Studies of Titanate Repolymerization in Water

    Local structures of high surface area sodium titanate materials have been examined as a function of pH using solid state 17O nuclear magnetic resonance (NMR) spectroscopy. Using 17O NMR, it is possible to determi...

    B. C. Bunker, C. H. F. Peden, R. J. Kirkpatrick… in MRS Online Proceedings Library (1996)

  8. No Access

    Article

    Surface Induced Calcium Phosphate Nucleation and Growth

    Calcium phosphate nucleation on colloidal oxide surfaces, such as TiO2, SiO2 and Al2O3, has been studied as a model system to understand the role of surface chemistry on crystal nucleation kinetics and phase form...

    L. Song, A. A. Campbell, X. S. Li, B. C. Bunker in MRS Online Proceedings Library (1995)

  9. No Access

    Article

    Microstructural evolution of Pb(Zr, Ti)O3 thin films prepared by hybrid metallo-organic decomposition

    We report on the microstructural analyses of chemically prepared Pb(Zr0.53Ti0.47)O3 (PZT 53/47) films. Although several techniques were used to analyze films, transmission electron microscopy (TEM) was emphasized...

    B. A. Tuttle, T. J. Headley, B. C. Bunker, R. W. Schwartz… in Journal of Materials Research (1992)

  10. No Access

    Article

    Chemical Preparation of Powders and Films for High Temperature Superconductors

    A precipitation process has been developed to prepare precursor powders which can be calcined and sintered to form high critical temperature superconductors such as YBa2Cu3O7−x. Precursor powders are prepared usi...

    B. C. Bunker, J. A. Voigt, D. L. Lamppa, D. H. Doughty… in MRS Online Proceedings Library (1988)

  11. No Access

    Article

    Raman and NMR Studies of Hydrous Sodium Titanates

    Raman and solid state 17O NMR spectroscopies have been used to determine the molecular structure of amorphous hydrous sodium titanate catalyst support materials prepared by hydrolysis of titanium isopropoxide. Th...

    B. C. Bunker, C. H. F. Peden, D. R. Tallant… in MRS Online Proceedings Library (1988)

  12. No Access

    Article

    Analytical Electron Microscopy of Leached Layers on Synthetic Basalt Glass

    Analytical electron microscopy was used to characterize leached layers formed on a synthetic basalt glass after 300 days in deionized water, sodium chloride solutions, or sodium chloride solutions containing m...

    T. Murakami, R. C. Ewing, B. C. Bunker in MRS Online Proceedings Library (1987)

  13. No Access

    Article

    A Hydroxycarbonate Route to Superconductor Precursor Powders

    A precipitation process is described for the preparation of powders that can be thermally decomposed to form high critical temperature superconductors such as YBa2Cu3O7. In the process, a cationic solution (a con...

    J. A. Voigt, B. C. Bunker, D. H. Doughty, D. L. Lamppa… in MRS Online Proceedings Library (1987)

  14. No Access

    Article

    Solution Chemistry of Silicate and Borate Materials

    Reactions which create and destroy Si-O-Si, Si-O-B, and B-O-B bonds occur in leached layers on borosilicate glasses during glass dissolution. Solid state NMR, Raman, and TEM techniques have been used to determ...

    B. C. Bunker in MRS Online Proceedings Library (1986)

  15. No Access

    Article

    Raman Spectra of Rings in Silicate Materials

    Raman spectroscopic studies on gel-derived silicates have confirmed that narrow bands near 607 cm-1 and 492 cm-1, first observed in the Raman spectrum of fused silica, are associated with three- and four-fold ...

    D. R. Tallant, B. C. Bunker, C. J. Brinker, C. A. Balfe in MRS Online Proceedings Library (1986)

  16. No Access

    Chapter

    Effect of Surface Corrosion on Glass Fracture

    The nature of aqueous corrosion reactions on glass surfaces varies with glass composition and environmental conditions. We have shown how the physical effects of the various surface reactions can be incorporat...

    B. C. Bunker, T. A. Michalske in Fracture Mechanics of Ceramics (1986)