A5005758630- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Organic Electronics and Photovoltaics
- Geology and Paleoclimatology Research
- Organic Light-Emitting Diodes Research
- Conducting polymers and applications
- Geochemistry and Elemental Analysis
- Molecular Junctions and Nanostructures
- Silicon Nanostructures and Photoluminescence
- Thin-Film Transistor Technologies
- Geological formations and processes
- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies
- Semiconductor materials and devices
- Physics of Superconductivity and Magnetism
- Silicon and Solar Cell Technologies
- Geomagnetism and Paleomagnetism Studies
- Soil erosion and sediment transport
- Nanowire Synthesis and Applications
- ZnO doping and properties
- Laser Material Processing Techniques
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
Australian National University
2015-2024
Lancaster University
2018
Oak Ridge National Laboratory
2014-2017
Los Alamos National Laboratory
2003-2015
Pennsylvania State University
2015
Korea Institute of Ocean Science and Technology
2015
Oregon Health & Science University
2011-2013
Center for Integrated Nanotechnologies
2011-2012
Okayama University
2005-2008
Chinese Academy of Sciences
2008
We demonstrate tuning of Schottky energy barriers in organic electronic devices by utilizing chemically tailored electrodes. The barrier Ag on poly[2-methoxy, 5-(2\ensuremath{'}-ethyl-hexyloxy)- 1,4-phenylene was tuned over a range more than 1 eV using self-assembled monolayers (SAM's) to attach oriented dipole layers the prior device fabrication. Kelvin probe measurements were used determine effect SAM's surface potential. Ab initio Hartree-Fock calculations molecular moments successfully...
We report electroabsorption measurements of built-in electric fields and internal photoemission Schottky barriers to determine the charge transfer single-particle energy gaps conjugated polymer poly[2-methoxy, 5-(2\ensuremath{'}-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV). For MEH-PPV, with an exciton absorption peak 2.25 eV, or results yield a gap 2.45 eV at least 2.35 eV. Therefore binding is 0.2 bipolaron less than 0.1
We demonstrate control and improvement of charge injection in organic electronic devices by utilizing self-assembled monolayers (SAMs) to manipulate the Schottky energy barrier between a metal electrode material. Hole from Cu electrodes into electroluminescent conjugated polymer poly[2-methoxy,5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene] was varied using two conjugated-thiol based SAMs. The chemically modified were incorporated diode structures changes metal/polymer barriers current–voltage...
Uranium-lead ages from an ion probe were taken for zircons the ore-bearing Noril'sk I intrusion that is comagmatic with, and intrusive to, Siberian Traps. These values match, within experimental error of ±4 million years, dates extracted a tuff at Permian-Triassic (P-Tr) boundary. The results are consistent with hypothesis P-Tr extinction was caused by basaltic flood volcanism. It likely eruption these magmas accompanied injection large amounts sulfur dioxide into upper atmosphere, which may...
The sulfides of the Merensky Reef and UG–2 chromite seam Bushveld Complex H.P. Stillwater have concentrated platinum group elements (PGE) with remarkable efficiency. Attempts to model these exposed two major problems: (i) very high Nernst distribution coefficients (D) are required (ii) a mass balance problem. second problem, that balance, stems from first. If D value is high, must reach equilibrium large silicate melt in order take full advantage this value. In practice R, silicate/sulfide...
Water is essential for the formation of granite and granite, in turn, continents. Earth, only inner planet with abundant water, The Moon other planets have little or no water granites
We present a unified device model for single layer organic light emitting diodes (LEDs) which includes charge injection, transport, and space effects in the material. The can describe both injection limited current flow transition between them. specifically considered cases energy barrier to of electrons is much larger than that holes so dominate device. Charge into material occurs by thermionic emission tunneling. For Schottky barriers less about 0.3–0.4 eV, typical LED parameters, electric...
We report superconducting and mechanical properties of YBa2Cu3O7−δ (YBCO) thick films on Ni-based alloys with a textured yttria-stabilized zirconia (YSZ) buffer layer. The YBCO YSZ layers were deposited by pulsed laser deposition ion beam assisted deposition, respectively. It was found that the transport critical current density (Jc) correlates very well mosaic spread. Jc over 1×10 6 A/cm2 at 75 K ∼1×107 4 obtained in 1-μm films. Zero field 120 amps 2-μm-thick 1-cm-wide film. Angular...
We investigate the behavior of a spherical blob buoyant fluid as gravity forces it toward either rigid horizontal boundary or free surface. The diapir is assumed much less viscous than ambient fluid. This fundamental problem simplest unsteady model relevant to ascent hot plumes material Earth's surface base lithosphere and closely models heads starting plumes. As approaches boundary, collapses in vertical spreads horizontally while layer surrounding mantle slowly squeezed out from betweeen...
Mantle plumes and plate tectonics, the result of two distinct modes convection within Earth, operate largely independently. Although are secondary in terms heat transport, they have probably played an important role continental geology. A new plume starts with a large spherical head that can cause uplift flood basalt volcanism, may be responsible for regional-scale metamorphism or crustal melting varying amounts extension. Plume heads followed by narrow tails give rise to familiar hot-spot...
Research Article| December 01, 2005 Large Igneous Provinces and the Mantle Plume Hypothesis Ian H. Campbell 1Earth Chemistry School of Earth Sciences The Australian National University ACT 0200 Australia Institute for Study Earth's Interior, Okayama at Misasa, Tottori, 682-0193, Japan E-mail: Ian.Campbell@anu.edu.au Search other works by this author on: GSW Google Scholar Author Article Information Publisher: Mineralogical Society America First Online: 09 Mar 2017 Online ISSN: 1811-5217...