The authors demonstrate a smart and versatile approach for preparing multi-spectral conjugated polymers from a commercial precursor MEH-PPV without tedious synthetic modification. Multi-color CPNs with small size have also been successfully prepared using a modified-reprecipitation procedure for live cell imaging.

Nanocrystals of several oligosilanes have been fabricated easily by using a reprecipitation method. The nanocrystals reveal an intense absorption band at the UVB region (280 to 320 nm) and a fluorescence band with large Stokes shift. These photophysical properties show that the nanocrystals exhibit an excitonic interaction of the H-aggregate type.

Zinc is currently extracted from sphalerite (ZnS) by either sintering-smelting or roasting-leaching. These high-temperature processes produce environmentally hazardous sulfur dioxide gas. Hence, sustainable zinc extraction calls for direct leaching at low temperatures. Here, we show that ferric methanesulfonate a high performing lixiviant this purpose. Using 0.8 M methanesulfonate, 99.3% Zn was...

The zircon record of complex high-grade gneiss terrains is key to interpreting their tectonothermal evolution. Typically, such studies focus on zircon-rich, felsic rocks, which commonly have a complicated (partial melting, inheritance, partial dissolution, and reprecipitation) record. Here we show that metamorphosed mafic rocks retained melts (i.e. in situ leucosomes) provide the evolution crus...

We report on the evolution of a hollow sphere secondary structure of spherical nanoparticles by a solubilization-reprecipitation mechanism based on the difference of solubility products (K(sp)) of two different precipitates. Carbon-coated nanoparticles of olivine structure LiFePO(4) served as the primary nano-blocks to build the secondary nano-architecture.

The potassium silicate (K-silicate) alteration zone is the main ore contributor in porphyry copper deposits worldwide. Knowledge of element behaviors and mineralization processes essential for an improved understanding mineralization, but they are still not well understood. In this study, we reacted synthetic Cl-rich fluids, containing K, Na, Cu, Mo, Zn, etc., with andesite a complex experiment...

I discuss the possibility that the quark-gluon plasma at strong coupling admits a description in terms of a black hole in asymptotically anti-de Sitter space. Prepared for the Proceedings of Recent Developments in Gravity – NEB XIII, Thessaloniki, Greece, June 2008. Research supported in part by the US Department of Energy under grant DE-FG05-91ER40627. E-mail: [email protected]

The Tsäkkok Lens of the Seve Nappe Complex in Scandinavian Caledonides comprises eclogite bodies hosted within metasedimentary rocks. These rocks are thought to be derived from outermost margin Baltica along periphery Iapetus Ocean, but detrital records sedimentary lacking.Many outcrops lens expose both well-foliated metapelitic and massive calc-silicates. contacts between these two lithologies...

Cadmium (Cd) isotopes have great potential for understanding Cd geochemical cycling in soil and aquatic systems. Iron (oxyhydr)oxides can sequester via adsorption isomorphous substitution, but how these interactions affect isotope fractionation remains unknown. Here, we show that preferentially enriches lighter on iron (oxyhydr)oxide surfaces through equilibrium fractionation, with a similar ma...