Flux Synthesis of New Multinary Bismuth Chalcogenides and their Thermoelectric Properties

1998 ◽  
Vol 545 ◽  
Author(s):  
Duck-Young Chung ◽  
Kyoung-Shin Choi ◽  
Paul W. Brazis ◽  
Carl R. Kannewurf ◽  
Mercouri G. Kanatzidis
Keyword(s):  
Thermal Stability ◽  
Electrical Conductivity ◽  
Thermoelectric Properties ◽  
Solid Solutions ◽  
Three Dimensional ◽  
Melting Behavior ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Flux Synthesis ◽  
Bismuth Chalcogenides

AbstractWe present the synthesis and structure of the new chalcogenide compounds, Rb0.5Bi1.83Te3, APb2Bi3Te7 (A = Cs, Rb), K1.25Pb3.50Bi7.25Se15 and A1+xPb4−2xSb7+xSe15 (A = K, Rb). The layered structures of the first two telluride compounds are related to each other in a very interesting fashion. These compounds are n-type metallic conductors and solid solutions with Se and Sb have also been synthesized. K1.25Pb3.50Bi7.25Se15 and its Sb analogs have a complex three-dimensional structure composed of NaCl- and Bi2Te3-type building units. The thermal stability, melting behavior, electrical conductivity and thermopower of these compounds are reported.

scholarly journals Three-Dimensional Structure and Thermal Stability Studies of DNA Nanostructures by Energy Transfer Spectroscopy

ChemPhysChem ◽  
2010 ◽  
Vol 11 (10) ◽  
pp. 2081-2084 ◽  
Author(s):  
Jong Bum Lee ◽  
Adam S. Shai ◽  
Michael J. Campolongo ◽  
Nokyoung Park ◽  
Dan Luo
Keyword(s):  
Thermal Stability ◽  
Energy Transfer ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Dna Nanostructures ◽  
Stability Studies ◽  
Three Dimensional Structure

scholarly journals Crystal structure of the solid solution Ba8.35Pb0.65(B3O6)6

2017 ◽  
Vol 73 (3) ◽  
pp. 349-353 ◽  
Author(s):  
Wenwu Zhao
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
High Temperature ◽  
Single Crystals ◽  
Solid Solutions ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Barium Borate ◽  
Three Dimensional Structure ◽  
Spontaneous Nucleation

Single crystals of lead barium borate, Ba8.35Pb0.65(B3O6)6, octabarium lead(II) hexakis(triborate), have been obtained by spontaneous nucleation from a high-temperature melt. Its three-dimensional structure is constructed on the basis of a BaO9polyhedron, a (Pb/Ba)O6octahedron (occupancy ratio Pb:Ba = 0.216:0.784) and a condensed B3O6ring anion. In the crystal, the planar B3O6anions are stacked in an alternating fashion with Ba and (Pb/Ba) atoms along [001]. A comparison is made with the structures of related solid solutions in the system Ba/Pb/B/O.

The Three-dimensional structure of frozen-hydrated nudaurelia capensis β virus

1987 ◽  
Vol 45 ◽  
pp. 650-651
Author(s):  
N. H. Olson ◽  
T. S. Baker ◽  
Wu Bo Mu ◽  
J. E. Johnson ◽  
D. A. Hendry
Keyword(s):  
South African ◽  
Rna Virus ◽  
Carbon Film ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Electron Dose ◽  
Total Electron ◽  
Three Dimensional Structure ◽  
Negative Stain ◽  
Dimensional Reconstruction

Nudaurelia capensis β virus (NβV) is an RNA virus of the South African Pine Emperor moth, Nudaurelia cytherea capensis (Lepidoptera: Saturniidae). The NβV capsid is a T = 4 icosahedron that contains 60T = 240 subunits of the coat protein (Mr = 61,000). A three-dimensional reconstruction of the NβV capsid was previously computed from visions embedded in negative stain suspended over holes in a carbon film. We have re-examined the three-dimensional structure of NβV, using cryo-microscopy to examine the native, unstained structure of the virion and to provide a initial phasing model for high-resolution x-ray crystallographic studiesNβV was purified and prepared for cryo-microscopy as described. Micrographs were recorded ∼1 - 2 μm underfocus at a magnification of 49,000X with a total electron dose of about 1800 e-/nm2.

Three Dimensional structure and organization of diploid chromosomes by optical section microscopy

1987 ◽  
Vol 45 ◽  
pp. 633-635
Author(s):  
David A. Agard ◽  
Yasushi Hiraoka ◽  
John W. Sedat
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Developmental State ◽  
Mitotic Cell ◽  
Biological Properties ◽  
Dimensional Structure ◽  
Specific Gene ◽  
Three Dimensional Structure ◽  
Complementary Techniques ◽  
Dynamic Structures

In an effort to understand the complex relationship between structure and biological function within the nucleus, we have embarked on a program to examine the three-dimensional structure and organization of Drosophila melanogaster embryonic chromosomes. Our overall goal is to determine how DNA and proteins are organized into complex and highly dynamic structures (chromosomes) and how these chromosomes are arranged in three dimensional space within the cell nucleus. Futher, we hope to be able to correlate structual data with such fundamental biological properties as stage in the mitotic cell cycle, developmental state and transcription at specific gene loci.Towards this end, we have been developing methodologies for the three-dimensional analysis of non-crystalline biological specimens using optical and electron microscopy. We feel that the combination of these two complementary techniques allows an unprecedented look at the structural organization of cellular components ranging in size from 100A to 100 microns.

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