Carbonyliron tin complexes CpFe(CO)2-S n M e3 (1), a5-(CO)4Fe(SnMe3)2 (2), cis(CO)4Fe(SnMe2Cl)2 (3), [R2SnFe(CO)4]2 (4a, R = Me; 4b, R = Bu), {Me2Sn[Fe(CO)4]2}2Sn (5), Me2Sn[Fe(CO)4]2Sn[Fe(CO)4]2 (6) and Sn[Fe(CO)4]4 (7) were studied by ll9Sn NM R. It proved possible for the first time to observe coupling constants './(119Sn57Fe) in the range of 36 to 64 Hz. The large magnitude of geminal coupl...

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In this paper, titanium dioxide nano-particles were synthesized by sol-gel method in acidic atmosphere. The microstructure, morphology, optical band gap, and hydrophilicity of the sample were studied. Optical band gap of titanium dioxide was probed via Diffuse Reflectance Spectra (DRS) and contact angle (CA) was measured to investigate surface activity. XRD analysis was used to study crys...

The effects of a third element, namely silver, copper, zinc, or antimony, on the microstructure and mechanical properties of eutectic tin-bismuth (Sn–Bi) solder were investigated. The investigation showed that, except for zinc, the addition of a trace amount of the third element improves the ductility of the Sn–Bi solder owing to the formation of a fine, homogeneous ternary eutectic microstruct...

With the continuous scaling of resistive random access memory (RRAM) devices, in-depth understanding of the physical mechanism and the material issues, particularly by directly studying integrated cells, become more and more important to further improve the device performances. In this work, HfO2-based integrated 1-transistor-1-resistor (1T1R) RRAM devices were processed in a standard 0.25 μm c...

We demonstrate logic and static random access memory (SRAM) circuits using a 100 μm long and 100 nm thin single ZnO nanowire (NW), which acts as a channel of field-effect transistors (FETs) with Al2O3 dielectrics. NW FETs are thus arrayed in one dimension to consist of NOT, NAND, and NOR gate logic, and SRAM circuits. Two respective top-gate NW FETs with Au and indium-tin-oxide (ITO) were conne...

From shacks in the shantytowns of Lima, Peru, to tin-roofed mud huts in the slums of Gujarat, India, insecurity of tenure and uneven income streams force the poor to build their homes tentatively, one wall at a time. Yet the poor lack access to financial institutions and financial products tailored to the way they build.This, despite the fact that in so many developing cities around the world a...

In this work, iron-doped SnO2 powders were prepared by two methods: mechanical alloying and mechanochemical alloying with successive thermal treatment. The influence of different milling conditions such as ball to powder weight ratio, milling time, rotation velocity of supporting disc and the type of iron starting reactive and their Fe concentration on the structural and magnetic properties of ...

Acknowledgments First and foremost, I would like to thank my supervisor Volker Diekert for his continual motivation and support over all my years in his group. He recommended the topic of this thesis to me and provided valuable guidance and advice. Furthermore I would like to thank Ulrich Hertrampf and Pascal Weil. I also wish to express my gratitude to Holger Austinat, Martin Horsch, Mar-tin M...

SnO2 sensors are widely used for the detection of air contaminants such as CO. Nevertheless, their application encounters many problems, first of all the effect of interfering gases. The low selectivity is in fact a well-known problem of these sensors. Moreover, the high operating temperature of metal oxide sensors implies in general high power consumption. In this work we present a study aimed...