Abstract:
Disclosed are new methods of fabricating metal oxide thin films and nanomaterial- derived metal composite thin films via solution processes at low temperatures (
Abstract:
A process for producing bulk thermoelectric compositions containing nanoscale inclusions is described. The thermoelectric compositions have a higher figure of merit (ZT) than without the inclusions. The compositions are useful for power generation and in heat pumps for instance.
Abstract:
A family of isostructural compounds have been prepared having the general formula AnPBmBinQ2n+m (figure 1). These compounds (figure 1) possess a NaCl lattice type structure (figure 1) as low thermal conductivity and controlled electrical conductivity. Furthermore, the electrical properties can be controlled by varying the values for n and m. These isostructural compounds can be used for semiconductor applications such as detectors, lasers and photovoltaic cells. These compounds also have enhanced thermoelectric properties making them excellent semiconductor materials for fabrication of thermoelectric devices.
Abstract:
A process for producing bulk thermoelectric compositions containing nanoscale inclusions is described. The thermoelectric compositions have a higher figure of merit (ZT) than without the inclusions. The compositions are useful for power generation and in heat pumps for instance.
Abstract:
Phase-change compounds, and optical storage recording media, for recording and/or storage of data, comprising such compounds, according to the formula XSbySz; wherein X is selected from the group consisting of K, Rb, TI, Na, Li, Cs and mixtures thereof; and wherein y is about 1 or about 5, and z is about 1 or about B. Preferably, X is K, y is 5 and z is B. Also provided are optical recording media comprising a layer of the phase-change material and methods of creating a reversible phasechange by irradiating the material with a laser radiation.
Abstract:
Compounds, methods and devices for detecting incident radiation, such as incident x-rays or gamma-rays, are provided. The detection of incident radiation can be accomplished by employing inorganic compounds that include elements with high atomic numbers, that have band gaps of at least about 1.5 eV, and that have an electrical resistivity of at least 10 6 Ωcm as photoelectric materials in a radiation detector. The compounds include inorganic compounds comprising at least one element from periods five or six of the Periodic Table of the Elements.
Abstract:
Composites comprising a continuous matrix formed from compounds having a rock salt structure (represented by the structure "MQ") and inclusions comprising chalcogenide compounds having a rock salt structure (represented by the structure "AB") are provided. Composites having the structure MQ-ABC2, where MQ represents a matrix material and ABC2 represents inclusions comprising a chalcogenide dispersed in the matrix material are also provided.
Abstract:
Soluble chalcogenido clusters together with transition metal ions and main group elements are shown to provide gels having interconnected, open frameworks. Following supercritical drying with liquid carbon dioxide, the chalcogels may be converted to aerogels. The aerogels possess high internal surface areas with a broad pore size distribution that is dependent upon the precursors used and the aging conditions applied. Some of the gels are encompassed by formulas such as M 4 [M' 4 Q x ] n , M 4 [M' 2 Q y ] n , M 4[ M'Q x ] n , M 3 [M"Q x ] n , or Me 2 [M"'Q x ] n , where M is a divalent, trivalent, or tetravalent metal ion; M', M", and M"' are typically Ge, Sn, P, As, Sb, Mo, or W; and Q is typically S, Se, or Te. Methods of preparing the chalcogenido clusters are also provided.
Abstract:
Phase-change compounds, and optical storage recording media, for recording and/or storage of data, comprising such compounds, according to the formula XSb y S z ; wherein X is selected from the group consisting of K, Rb, TI, Na, Li, Cs and mixtures thereof; and wherein y is about 1 or about 5, and z is about 1 or about B. Preferably, X is K, y is 5 and z is B. Also provided are optical recording media comprising a layer of the phase-change material and methods of creating a reversible phasechange by irradiating the material with a laser radiation.