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1.
On Oxorhodates of Alkali Metals: β-LiRhO2 We prepared hitherto unknown β-LiRhO2 in form of black, cubic single crystals, O4–F4132, a = 841.27(6) pm, Z = 16. For a first time in case of such metal oxides we find one of the possible variants of order between the NaCl-type with random distribution and the complete ordered types like α-NaFeO2 as a single crystal (four-circle-diffractometer PW 1100, AgKα, 100 von 109 I0(hkl), R = 9.10%, Rw = 5.46%). The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, these via Mean Fictive Ionic Radii, MEFIR, were calculated and discussed. 相似文献
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A review of recent trends in the dispersion, purification, and assembly of colloidal nanoparticles highlights a number of growing analogies with ideas borrowed from polymer science. Beyond the similar scales of size, several key concepts lying at the foundation of polymer physics—such as polydispersity, fractionation, phase ordering, and viscoelasticity—are taking on new and unique significance in the contemporary realm of nanotechnology. Leveraging “soft matter” at the nanoscale to simplify materials processing and improve material performance is becoming a reality, with potentially profound implications for a number of emerging technologies. © 2013 Wiley Periodicals, Inc. J Polym Sci Part B: Polym. Phys. 2013 , 51, 1195–1208 相似文献
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Th. R. Cunningham R. J. Price St. G. Simpson W. C. Schumb P. Klinger O. Schliessmann D. R. Nijk H. Bart G. v. Hevesy R. Hobbie A. Asmanow P. H. M. P. Brinton R. B. Ellestad G. Scagliarini P. Pratesi I. M. Kolthoff J. J. Lingane J. Volmar Mathis J. Perrin E. Bayle R. Fabre H. George H. Gräven G. Canneri und L. Fernandes 《Fresenius' Journal of Analytical Chemistry》1934,99(3-4):113-129
Ohne Zusammenfassung 相似文献
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Chunlin Zhou Erik K. Hobbie B. J. Bauer Charles C. Han 《Journal of Polymer Science.Polymer Physics》1998,36(15):2745-2750
Deuterium-labeled polystyrene modified by random distributions of the comonomer p-(1,1,1,3,3,3-hexaflouro-2-hydroxyisopropyl)-α-methyl-styrene [DPS(OH)] has been blended with poly(butyl methacrylate) (PBMA) and studied with small-angle neutron scattering (SANS). Miscibility is induced via hydrogen bonding between the DPS(OH) hydroxyl group and PBMA carbonyl groups. The data suggest that the nature of the miscible-phase structure in these blends differs from that of the usual homopolymer blends at small scattering angles, which we attribute to the short-range site specific nature of the hydrogen bond interaction. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 2745–2750, 1998 相似文献
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Erik K. Hobbie 《Rheologica Acta》2010,49(4):323-334
The shear rheology of carbon nanotube suspensions is reviewed from the perspective of colloid and polymer science. In the
semi-dilute to concentrated regimes, the nature of the equilibrium or quiescent state is often dominated by nanotube entanglement
and strong attractive inter-particle interactions that favor the formation of a disordered network or gel. The strength of
this network with respect to the applied stress dictates the development of mesoscale structural anisotropy, first through
a global yield stress and then through a critical stress for homogenization. For concentrated suspensions, the nematic liquid-crystalline
order anticipated for high-aspect-ratio rigid rods has been observed in a few select scenarios. The opportunity for deeper
theoretical insight is emphasized and intuitive physical arguments are offered that might serve as a foundation for future
study. 相似文献
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Hobbie EK 《The Journal of chemical physics》2004,121(2):1029-1037
A semimacroscopic model of an optically anisotropic nanotube suspension is derived perturbatively from Maxwell's equations in a dielectric medium. We calculate leading-order expressions, valid in the dilute and semidilute limits, for the intrinsic and form contributions to the complex dielectric tensor in terms of the volume fraction, mean orientation, aspect ratio, optical anisotropy, and optical contrast of the nanotubes. The birefringence and dichroism are derived explicitly to leading order in fluctuations, and the connection with depolarized light scattering is established. The results are generalized to include tube deformation. 相似文献
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S. Li K. B. Migler E. K. Hobbie H. Kramer C. C. Han E. J. Amis 《Journal of Polymer Science.Polymer Physics》1997,35(17):2935-2943
A light-scattering photometer with optical microscope for in-line studies during polymer processing is described. The instrument utilizes a commercial twin-screw extruding device that feeds molten polymer into a narrow slit die equipped with sapphire optical windows. The flow rate through the die is controlled via the feed rate, screw rate, and a by-pass valve. The optics for light scattering and microscopy can be switched back and forth via simple translation of a rail-mounted optical platform without realignment, allowing efficient in situ morphological studies in both real and reciprocal space. Extruded polystyrene/polyethylene blends and melts are used to demonstrate the performance and versatility of the instrument. © 1997 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 35: 2935–2943, 1997 相似文献
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Marie‐Pierre Collin Sven N. Hobbie Erik C. Böttger Andrea Vasella 《Helvetica chimica acta》2008,91(10):1838-1848
In search for new antibiotics we replaced the amide moiety of lincomycin 1 by a 1,2,3‐triazole ring. The 1,2,3‐triazoles 10a – 10k were obtained as single regioisomers by ‘click reaction’ of azide 5 with the alkyne 9k , derived from propyl hygric acid, and the alkyl, aryl, or cycloalkyl alkynes ribosomes 9a – 9j . The new analogues proved inactive towards wild‐type and A2058G mutant. 相似文献