Active/Inactive Nanocomposites as Anodes for Li-Ion Batteries. -Composites consisting of active grains which can alloy with Li and inactive grains which cannot are made by mechanical alloying of elemental powders. The inactive grains act as matrix to hold the active grains as they repeatedly alloy with Li during the operation of a Li battery. A microscopic mixture of 25% Sn 2 Fe (active) and 75% SnFe 3 C (inactive) shows a volumetric capacity for Li which is twice that of the graphitic materials. The composite retains its capacity for many charge/discharge cycles and, therefore, materials like this may be the anodes of choice for the next generation of high-energy lithium batteries. -(MAO, O.; TURNER, R. L.; COURTNEY, I. A.; FREDERICKSEN, B. D.; BUCKETT, M. I.; KRAUSE, L. J.; DAHN, J. R.; Electrochem. Solid-State Lett. 2 (1999) 1, 3-5; Dep. Phys., Dalhousie Univ., Halifax, Nova Scotia B3H 3J5, Can.; EN)

Magnetic anisotropy and order structure of L10-FePt(001) single-crystal films grown epitaxially on (001) planes of MgO, SrTiO3, and MgAl2O4 substrates A hightemperature xraydiffraction study of epitaxial PbTiO3 thin films on MgO(100) grown by metalorganic chemicalvapor deposition Preparation and properties of (Pb,La)(Zr,Ti)O3 thin films by metalorganic chemical vapor deposition

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The submllled manuscrlpl hall been authored[ by a conlraclor of the U.S. Government| under contract No. W-31-109-ENG-38.| Accordingly,the U.S. Governmentrellllns a| nonexcluslve,royally-free license to publish| or reproduce the published form of thls| contribution, or allow others to do so, for| u.s. eovemme,pu_. l DISCLMMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

This article presents a methodical approach for generating, collecting, and analyzing nano-size (1-100 nm) aerosol from abraded dental composite materials. Existing aerosol sampling instruments were combined with a custom-made sampling chamber to create and sample a fresh, steady-state aerosol size distribution before significant Brownian coagulation. Morphological, size, and compositional information was obtained by Transmission Electron Microscopy (TEM). To create samples sizes suitable for TEM analysis, aerosol concentrations in the test chamber had to be much higher than one would typically expect in a dental office, and therefore, these results do not represent patient or dental personnel exposures. Results show that nano-size aerosol was produced by the dental drill alone, with and without cooling water drip, prior to abrasion of dental composite. During abrasion, aerosol generation seemed independent of the percent filler load of the restorative material and the operator who generated the test aerosol. TEM investigation showed that "chunks" of filler and resin were generated in the nano-size range; however, free nano-size filler particles were not observed. The majority of observed particles consisted of oil droplets, ash, and graphitic structures.