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- W2895958154 abstract "This thesis presents the fabrication and characterization of Bi(1-x)Sb(x) nanowire assemblies with wellcontrolled and systematically adjusted wire diameter, composition, and vertical or tilted geometrical alignment. The nanowire assemblies were fabricated by means of ion-track technology combining chemical etching of ion-irradiated polymer membranes with electrodeposition of Bi and Sb into track-etched nanochannels. By systematic variation of the etching and deposition conditions, including pulsed potentialparameters and surfactant concentration in the electrolyte, the fabrication process was optimized yielding homogeneously grown, uniform nanowire assemblies and networks. The influence of the deposition parameters on morphology and crystalline structure of the resulting Bi, Sb and Bi(1-x)Sb(x) nanowires and networks was investigated by means of X-ray diffraction, high resolution transmission and scanningelectron microscopy. Seebeck coefficient and electrical resistance of the nanowire assemblies were investigatedin detail as a function of nanowire diameter and temperature. The results confirm the p- and n-typebehavior of the Sb and Bi nanowires and provide evidence of the influence of size effects on the thermoelectrictransport properties. In addition, a method to measure all relevant thermoelectrical cross-plane properties to deduce the thermoelectric efficiency of a given nanowire assembly was developed. This includes the measurement of the electrical and thermal conductivity as well as the Seebeck coefficient of a nanowire assembly. Finally, more complex nanowire systems were fabricated by combining ion-tracknanotechnology and microtechnology to prepare thermocouples formed by Sb and Bi nanowire arrays. These three-dimensional nanowire assemblies of parallel or interconnected nanowires with adjustable diameter and density, embedded in polymer templates, are of great interest for future implementation as e.g. flexible infrared sensors." @default.
- W2895958154 created "2018-10-26" @default.
- W2895958154 creator A5066071080 @default.
- W2895958154 date "2018-05-30" @default.
- W2895958154 modified "2023-09-23" @default.
- W2895958154 title "Bi and Sb Nanowire Assemblies for Thermoelectric Applications" @default.
- W2895958154 hasPublicationYear "2018" @default.
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