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81.
Density functional theory-based simulations of scanning tunneling micrographs were used for comparison to published experimental images of reconstructed SrTiO3(001) surfaces. It was found that the addition of dissociatively adsorbed H2O to the presently accepted structural solution of the 2 × 1 reconstruction is more consistent with the experimental data. A proposed model for the c(4 × 4) reconstruction, based on the hydrated 2 × 1 structure, agrees well with experiment and is consistent with a formation process consisting of the simple dehydration of a wet 2 × 1 structure. 相似文献
82.
S Loser H Miyauchi JW Hennek J Smith C Huang A Facchetti TJ Marks 《Chemical communications (Cambridge, England)》2012,48(68):8511-8513
A solution-processed small molecule utilizing a novel 4,9-bis(2-ethylhexyloxy)naphtho[1,2-b:5,6-b']dithiophene "zig-zag" core (zNDT) exhibits high hole mobility, upshifted frontier MO energies, and enhanced photovoltaic cell short-circuit currents, fill-factors, and power conversion efficiencies (4.7%) versus the linear NDT isomer. 相似文献
83.
Becerra-Toledo AE Marshall MS Castell MR Marks LD 《The Journal of chemical physics》2012,136(21):214701
Density functional theory is used to simulate high-bias, constant-current scanning tunneling micrographs for direct comparison with experimental images. Coupled to previous spectroscopic data, these simulations are used to determine the atomic structure of Ti-rich nanostructures on strontium titanate (001) surfaces. These nanostructures have three consecutive TiO(x) surface layers and exploit the distinctive structural motif of the c(4 × 2) reconstruction as their main building block. A structural model of a characteristic triline defect is also proposed. 相似文献
84.
E. A. Marks E. I. Burmakin B. D. Antonov G. Sh. Shekhtman 《Russian Journal of Electrochemistry》2000,36(5):516-521
Solid solutions based on rubidium pyrophosphate are synthesized in the Rb4 -2xMxP2O7 systems (M = Ca, Sr, Ba, Pb). The temperature and concentration dependences of their rubidium-cation conductivity are investigated.
The X-ray data for the low and high-temperature forms of Rb4P2O7 and also for solid solutions based on it are reported. The effect exerted by modifying cation M2+ on electrical properties of synthesized solid solutions is considered 相似文献
85.
Christine Mousty Arielle Lepellec Serge Cosnier Andres Novoa Robert S. Marks 《Electrochemistry communications》2001,3(12):727-732
We describe herein, the creation of an organic phase enzyme electrode (OPEE) via avidin–biotin interactions built over an electrogenerated polymer. Multilayered polyphenol oxidase (PPO) assemblies were transferred into an organic solvent (chloroform) for the catechol detection at −0.2 V. In conjunction with an alginate gel, as a hydrophilic additive, the biosensor performance was widely enhanced. The effects of biotinylated polypyrrole film and alginate gel on the diffusion process through the biosensor coating are studied by rotating disk electrode experiments carried out in chloroform with hydroquinone as electroactive permeant. 相似文献
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88.
K. Hansen O. Dybing M. Jowett M. Marks und D. Lipkin 《Fresenius' Journal of Analytical Chemistry》1942,124(7-8):312-314
Ohne Zusammenfassung 相似文献
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