Showing papers by "Miaofang Chi published in 2007"
TL;DR: In this paper, the authors report the successful growth of single phase, fully epitaxial thin films of the multifunctional material, Pb V O 3, using pulsed laser deposition.
Abstract: Multifunctional materials promise to provide the foundation for a new class of devices in which functional properties are coupled to one another Examples include magnetoelectric materials in which magnetic and ferroelectricproperties are coupled Here the authors report the successful growth of single phase, fully epitaxialthin films of the multifunctional material, Pb V O 3 , using pulsed laser deposition This growth offers an alternative means for the production of Pb V O 3 outside of high-temperature and high-pressure techniques through growth of epitaxialthin films on various substrates The structure of this highly distorted perovskite is examined using x-ray diffraction, Raman spectroscopy, and transmission electron microscopy
43 citations
01 Jan 2007
TL;DR: This article showed that most of the GEMS-like materials so far identified in Stardust aerogel were likely impact generated during collection, and the presence or absence of GEMS in the Wild-2 sample is important because it addresses the relationship between chondritic porous interplanetary dust particles and comets.
Abstract: It is expected that Comet Wild-2 dust should resemble anhydrous carbon-rich, chondritic porous (CP) interplanetary dust particles (IDPs) collected in the stratosphere because some CP IDPs are suspected to be from comets. The rarity of carbonaceous grains and presolar silicates, as well as the presence of high-temperature inner solar nebula minerals in the Wild-2 sample (e.g. osbornite and melilite), appear incompatible with most CP IDPs. However, it is premature to draw firm conclusions about the mineralogy of comet Wild-2 because only approx. 1% of the sample has been examined. The most abundant silicates in CP IDPs are GEMS (glass with embedded metal and sulfides). Nonsolar O isotopic compositions confirm that at least some GEMS in IDPs are presolar amorphous silicates. The presence or absence of GEMS in the Wild-2 sample is important because it addresses, (a) the relationship between CP IDPs and comets, and (b) the hypothesis that other GEMS in IDPs formed in the solar nebula. Here we show that most of the GEMSlike materials so far identified in Stardust aerogel were likely impact generated during collection. At the nanometer scale, they are compositionally and crystallographically distinct from GEMS in IDPs.
7 citations
TL;DR: Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 - August 9, 2007 as discussed by the authors. But this paper is not related to our work.
Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
3 citations
TL;DR: In this paper, the authors present an analysis of the relationship between the properties of materials and their properties in terms of their properties and properties in the context of materials science and technology at Lawrence Livermore National Laboratory.
Abstract: 1 Materials Science and Technology Division, Chemistry, Materials and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA 2 Department of Chemical Engineering and Materials Science, University of California, 1 Shields Avenue, Davis, CA 95616, USA. 3 Micro and Interfacial Science Dept, Sandia National Labs, Livermore, CA 94550, USA 4 Institute for Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550 , USA. 5 University of Antwerp, EMAT Research Group, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium 6 Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
2 citations