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Article
Platinum-group element geochemistry of the shoshonitic igneous suite of Vulcano (Aeolian Arc, Italy): implications for chalcophile element fertility of arc magmas
Platinum-group element (PGE) geochemistry of arc-related magmas can be used to constrain the timing of sulfide saturation, which plays a critical role in the chalcophile element fertility of evolving magmatic ...
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Article
The concurrent emergence and causes of double volcanic hotspot tracks on the Pacific plate
The emergence of geographically and geochemically distinct double volcanic chains on the Pacific plate coincides with a recent azimuthal change in the motion of the plate.
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Article
Lithospheric controls on magma composition along Earth’s longest continental hotspot track
A 2,000-kilometre-long volcanic hotspot track is identified in eastern Australia, along which magma composition and volcanic outcrop show a strong correlation with lithospheric thickness, providing an observat...
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Article
The largest Au deposits in the St Ives Goldfield (Yilgarn Craton, Western Australia) may be located in a major Neoarchean volcano-sedimentary depo-centre
The largest Neoarchean gold deposits in the world-class St Ives Goldfield, Western Australia, occur in an area known as the Argo–Junction region (e.g. Junction, Argo and Athena). Why this region is so well end...
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Chapter
Semiconductor Nanowires for Solar Cells
This chapter discusses studies of semiconducting nanowire arrays for solar cells. The concept of 3D nanowire architectures for photovoltaic light harvesting to effectively decouple light absorption and carrier...
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Article
Modeling of Channel Formation in Organic Field Effect Transistors
We report results of two-dimensional electrostatic modeling for (top-contact) organic field effect transistors, focusing on the formation of the conductive channel. The effect on channel formation of the choic...
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Article
Two-dimensional modeling of organic field effect transistors
We present device simulations for p-channel organic field effect transistors. The current conservation equation and Poisson’s equation are solved self-consistently in two dimensions in the drift-diffusion appr...
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Article
SHRIMP U-Pb zircon geochronology evidence for two stages gold mineralization at Kanowna Belle, Eastern Goldfields Province, Yilgarn Craton, Western Australia
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Article
Study of high-quality epitaxial YBCO thin films grown directly on Y-Cut LiNbO3
Pulsed laser deposition was used to deposit high-quality YBa2Cu3O7-δ (YBCO) thin films directly on y-cut LiNbO3 substrates. The as-deposited YBCO films had a high degree of in-plane orientation and showed superco...
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Article
Synthesis of low resistivity complex oxides on MgO using Pt as buffer layer
Highly crystalline SrRuO3 (SRO) and La0.5Sr0.5CoO3 (LSCO) thin films were deposited on (100) Pt/ MgO by pulsed laser deposition. The films were mainly (001) textured normal to the substrate surface with a high de...
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Article
Opto-Electronic Properties of μc-Si Grown from SiF4 and H2 by PECVD
Microcrystalline Si was grown from SiF4 and H2 by plasma-enhanced chemical vapor deposition. The films are almost completely crystalline with a crystallite size (determined from Raman spectra) of about 60 Å. The ...
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Article
Critical Review of Raman Spectroscopy as a Diagnostic Tool for Semiconductor Microcrystals
Raman scattering is becoming a widely used tool for the characterization of semiconductor microcrystals due to its sensitivity to crystal sizes below a few hundred angstroms. Through detailed analysis of the f...
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Article
a-Si and μc-Si Grown from SiF4 with High H2 Dilution in a DC Glow Discharge
a-Si and μc-Si were grown from SiF4 with H2 dilution in a DC glow discharge. The crystallinity of films deposited over a range of substrate temperatures and SiF4/H2 flow ratios was studied by Raman spectroscopy a...
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Article
The Effect of Hydrogen on the Structure and Electrical and Optical Properties of Silicon-Germanium Alloys
The transport properties of intrinsic micro-crystalline and amorphous SiGe films are investigated. In the amorphous system it is found that the electron lifetime is relatively independent of band gag while the...
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Article
Melting in an Archaean mantle plume: heads it's basalts, tails it's komatiites
THE lower part of most Archaean greenstone sequences is dominated by interlayered basaltic and komatiitic (ultrabasic) flows. These two magma types are petrologically and geochemically distinct, yet they displ...
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Article
The age and origin of younger granitic plutons of the Shaw Batholith in the Archaean Pilbara Block, Western Australia
The whole-rock Pb-Pb method has been used to date four of the younger, mainly adamellite, late-tectonic plutonic phases within the ca. 3.5 Ga Shaw Batholith of the Archaean east Pilbara Block. Three suites giv...
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Article
Picosecond Optical Determination of Carrier Lifetime in Polysilicon Films
The lifetime of optically injected carriers is determined in polySi/SiO2/Si structures grown by LPCVD at 625 °C. These samples are as-grown, have undergone H diffusion or have been implanted by phosphorous ions, ...
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Article
Microcrystallinity in α-Si,Ge:H,F Alloys
Microcrystalline inclusions in hydrogenated and fluorinated amorphous silicon-germanium alloys, α-Si,Ge:H,F, were studied. Microcrystals grown during RF or DC glow discharge deposition from SiF4, GeF4 and H2 cons...
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Article
The Structure of a-Si:H,F/a-Si,Ge:H,F Interfaces
We study the interface between un-alloyed a-Si:H,F and an a-Si0.4,Ge0.6:H,F alloy using superlattice structures. From infrared spectroscopy we estimate a width of 8 A for the excess hydrogen layer, and X-ray diff...
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Article
Properties of Thin Films after Focused Beam Processing
A Raman microprobe is used to detect the changes in crystallinity, stress and homogeneity on thin films of SOI irradiated by a single laser pulse. Maximum, isotropic, planar tensile stress increased from 5 × 109 ...
