We studied the electronic structure of rare-earth ditelluride (ReTe2: Re = La, Pr, Sm, and Gd) using photoemission spectroscopy. From the x-ray photoelectron spectroscopy (XPS) study of the 3d core levels of rare-earth elements, we found that all the rare earth elements are trivalent. We have also made theoretical calculations using the Gunnarsson and Schönhammer approximation and multiplet cal...

The reactivity of Mn2O3 and late rare-earth sesquioxides in alkaline aqueous solution affords a highyield formation of rare-earth manganites, LnMnO3 (Ln 1⁄4 Ho–Lu and Y). The yield of the products depends significantly on the pH, which determines the solubility of the manganese cation, and reaction temperature, which regulates the decomposition of the insoluble rare-earth trihydroxide, Ln(OH)3,...

High-quality In0.53Ga0.47As epilayers have been grown on semi-insulating ~100! Fe-doped InP substrates. The growths were performed by liquid phase epitaxy ~LPE! using rare-earth-doped melts in a graphite boat. The rare-earth elements studied were Yb, Gd and Er which act as gettering agents of impurities. Hall measurements show an elevated electron mobility for rare-earth-treated samples over un...

The rare-earth elements are critical to many green energy technologies but are difficult to separate from one another because of their chemical similarity. We demonstrate an alternative, biogenic method based on the adsorption of lanthanide to the bacterium Roseobacter sp. AzwK-3b, immobilized on an assay filter, followed by subsequent desorption as a function of pH. The elution desorption data...

Luminescence is now extensively used in biology since it constitutes as a very sensitive way of investigations. Several applications of fluorescence concern immunoassays, DNA hybridization, protein interactions, cell imaging, Lab-on-chip etc.;; As non biological fluorescent probes, organic dye molecules and semiconductors quantum dots are the most popular. However, they suffer from drawbacks wh...

The development of ultraminiaturized identification tags has applications in fields ranging from advanced biotechnology to security. This paper describes micrometer-sized glass barcodes containing a pattern of different fluorescent materials that are easily identified by using a UV lamp and an optical microscope. A model DNA hybridization assay using these "microbarcodes" is described. Rare ear...

An optical fiber becomes active by doping its core with one or more atomic elements, usually (but not restricted to) rare-earths (RE’s), more specifically, the lanthanides that occupy the atomic numbers 57 to 71 of the periodic table. As it will be mentioned later in more detail, they use three electrons in bonding to the condensed materials such as crystals and glasses to become triply ionized...

Brittle and Ductile Deformational Structures in Tectonic Zones: The Research Trends in India N MANDAL1*, A CHATTOPADHAYAY2, H B SRIVASTAVA3, T K BISWAL4 and S BOSE5 1Department of Geological Sciences, Jadavpur University, Kolkata 700 032, India 2Department of Geology, University of Delhi, Delhi 110 007, India 3Department of Geology, Banaras Hindu University, Varanasi 221 005, India 4Department ...

Three decades have passed since the launch of the first international satellite sensor programme designed for monitoring Earth’s resources. Over this period, forest resources have come under increasing pressure, thus their management and use should be underpinned by information on their properties at a number of levels. This paper provides a comprehensive review of how satellite remote sensing ...

We report partial melting of an ultrahigh pressure eclogite in the Mesozoic Sulu orogen, China. Eclogitic migmatite shows successive stages of initial intragranular and grain boundary melt droplets, which grow into a three-dimensional interconnected intergranular network, then segregate and accumulate in pressure shadow areas and then merge to form melt channels and dikes that transport magma t...