In this thesis the growth of catalyst-free In(Ga)As nanowires on Si(111) by molecular beam epitaxy was investigated. In particular, two growth strategies were developed, i.e., a self-assembled (spatially unordered) nanowire growth on SiOx/Si(111) and site-selective growth (spatially ordered nanowires) on lithographically patterned SiO2/Si(111). The nanowire growth parameter window with respect to growth temperature and flux rates was investigated and the high temperature thermal stability of InAs nanowires analyzed. In addition, the dominant nanowire growth mechanism was elaborated. Moreover, the crystal structure of InAs nanowires was studied by transmission electron microscopy. For band gap tuning the incorporation of Ga during In(Ga)As nanowire growth was investigated and the composition homogeneity analyzed. Variable Ga contents between 0 % and 60 % in the nanowires were achieved with very high composition homogeneity.
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In this thesis the growth of catalyst-free In(Ga)As nanowires on Si(111) by molecular beam epitaxy was investigated. In particular, two growth strategies were developed, i.e., a self-assembled (spatially unordered) nanowire growth on SiOx/Si(111) and site-selective growth (spatially ordered nanowires) on lithographically patterned SiO2/Si(111). The nanowire growth parameter window with respect to growth temperature and flux rates was investigated and the high temperature thermal stability of InA...
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